CN110833723A - Mineral filter material, preparation method thereof and filter element obtained by using mineral filter material - Google Patents
Mineral filter material, preparation method thereof and filter element obtained by using mineral filter material Download PDFInfo
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- CN110833723A CN110833723A CN201810934705.9A CN201810934705A CN110833723A CN 110833723 A CN110833723 A CN 110833723A CN 201810934705 A CN201810934705 A CN 201810934705A CN 110833723 A CN110833723 A CN 110833723A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
- B01D39/2082—Other inorganic materials, e.g. ceramics the material being filamentary or fibrous
- B01D39/2089—Other inorganic materials, e.g. ceramics the material being filamentary or fibrous otherwise bonded, e.g. by resins
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
Abstract
The invention discloses a mineral filter material, a preparation method thereof and an obtained filter element. The filter material comprises the following raw materials in parts by weight: 9-24 parts of secondary quartzite, 3-8 parts of feldspar quartz sandstone, 2-5 parts of rhodochrosite, 20-40 parts of zeolite, 10-30 parts of activated carbon particles, 5-20 parts of activated carbon fibers and 20-40 parts of a binder; the rhodochrosite is a mixture of iron rhodochrosite and zinc rhodochrosite in a weight ratio of 1-3:2, and the zeolite is a mixture of phillipsite and analcime in a weight ratio of 1-3: 1; the invention also provides a preparation method of the filter material and a filter element prepared by the filter material. The natural rock materials are reasonably matched to obtain the filter element which can stably release mineral substances beneficial to the growth and development of infants, the TDS of the water mineralized by the filter element is kept at 10-40mg/L, and the filter element is environment-friendly, has no secondary pollution and has no heavy metal exceeding standard.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a mineral filter material, a preparation method thereof and an obtained filter element.
Background
Water is a source of life, children are a source of hope, various physiological functions of infants are not developed to be mature, and most parents pay attention to diet and drinking water health. The drinking water safety of infants is seriously threatened due to the severe water pollution situation. On one hand, various pollutants such as heavy metals, antibiotics and the like in water seriously threaten the body health of infants, and the infants are more easily injured under the condition of the exposure of the pollutants with the same concentration; on the other hand, as the liver and kidney functions of the infants are not mature, the visceral organ burden of the infants is increased when the infants drink high-TDS water, and children experts in countries such as Bulgaria recommend that the TDS of the infant drinking water is lower than 100mg/L and that the TDS of the infant drinking water is low. The total dissolved solids of tap water in most areas of China are higher than 100mg/L, and even reach more than 400mg/L in many places. In this case, for most families, water treatment is carried out by a water purifier, particularly a reverse osmosis water purifier, and the water purifier provides the best choice for safe drinking of infants. The reverse osmosis technology can remove pollutants in water and simultaneously reduce TDS to a very low level; however, the reverse osmosis technology filters water too clean and brings new problems, and the loss of a large amount of mineral substances in the water brings new health risks.
Because the channel for acquiring mineral substances by infants is single, and mainly comprises breast milk, formula food and water, the water is also a main way for the infants to take mineral elements. WHO points out that the contribution of minerals in drinking water is indispensable to infants, both breast-fed and formula-fed. Over a long period of time, the effects of minerals in drinking water have been neglected. In recent years, a number of epidemiological surveys, animal experiments, and clinical trials have led scientists to recognize that mineral balance in drinking water is critical to health. Professor Kondratyuk has shown through animal experimental studies that minerals reduced in intake by drinking demineralized water cannot be automatically supplemented by diet, resulting in low electrolyte levels for a long time ago. It has been reported that infants and young children drink distilled water or pure water for a long time to cause metabolic acidosis.
There have also been some prior art attempts to remineralize the softened water to improve the mineral content of the softened water. Currently, there are three main types of filter element products used for mineralizing softened water: 1. soluble calcium salt, magnesium salt, potassium salt, sodium salt and cohesive soil are mixed and granulated, the mineralized balls of the process are main products on the market, but the prior stage dissolution is not controlled, particularly under the soaking condition, the mineralization degree is too high, the proportions of various mineral substances are not coordinated, and potential safety hazards exist; 2. the medical stone, the zeolite, the tourmaline and other rocks are ground and granulated, and the product of the process has almost no effect under the condition of water and has safety risks of heavy metal precipitation and the like; 3. the natural medical stone is directly filled, and because the speed of precipitating mineral substances from the natural medical stone in water is too slow, the effect of softening mineral substance components in water is not improved in a short time, and the safety risk of secondary pollution also exists.
Disclosure of Invention
The invention provides a mineral filter material, a preparation method thereof and an obtained filter element, and solves the problems that the filter element for mineralizing softened water in the prior art is low in mineral precipitation speed, inconsistent in proportion and easy to cause heavy metal poisoning.
The invention relates to a mineral filter material, which is mainly realized by the following technical scheme: the feed comprises the following raw materials in parts by weight: 9-24 parts of secondary quartzite, 3-8 parts of feldspar quartz sandstone, 2-5 parts of rhodochrosite, 20-40 parts of zeolite, 10-30 parts of activated carbon particles, 5-20 parts of activated carbon fibers and 20-40 parts of a binder; the rhodochrosite is a mixture of iron rhodochrosite and zinc rhodochrosite in a weight ratio of 1-3:2, and the zeolite is a mixture of phillipsite and analcime in a weight ratio of 1-3: 1.
The mother and infant water is 'natural mineral water for drinking' which reaches or is superior to the national standard, and is drinking water which is most suitable for pregnant and infant groups to supplement mineral substances and nutrient elements according to the standard of 'daily drinking water volume and nutrient demand volume' of pregnant and lying-in women and infants of Chinese nutrition society from the aspect of resource distribution and demand subdivision. According to the invention, secondary quartzite, feldspar quartz sandstone, iron-rhombohedral manganese ore, zinc-rhodochrosite, phillipsite and analcite are reasonably matched by utilizing a natural rock material to obtain a filter material capable of stably releasing minerals beneficial to the growth and development of infants, the filter material can also reduce the TDS of purified water, and after the purified water subjected to reverse osmosis desalination is remineralized by the filter material, the obtained water is more suitable for the infants to drink; the filter material is green and environment-friendly, no heavy metal is separated out in the mineralization process, no secondary pollution is caused, and the obtained mineralized water is free of exceeding the standard of the heavy metal.
As a preferred embodiment, the secondary quartzite has a particle size of 1-8 μm, an effective porosity of 20-25% and a specific surface area of 0.55-0.65m2(ii)/g; the particle size of the feldspar quartz sandstone is 1-8 mu m, the effective porosity is 70-80%, and the specific surface area is 4.00-5.00m2(ii) in terms of/g. The method controls the grain size and the effective porosity of the secondary quartzite and the feldspar quartzite to effectively improve the specific surface area of the secondary quartzite and the feldspar quartzite, and can promote the water-rock reaction, thereby quickly releasing mineral elements required by infants. The secondary quartzite is metamorphic rock, the feldspar quartzite is sedimentary rock, and the two kinds of rocks of different types are mixed for use, so that the natural characteristics of the two kinds of rocks are fully exerted.
As a preferred embodiment, the weight ratio of the secondary quartzite to the feldspar quartz sandstone is 2-4: 1. The secondary quartzite is preferably kaolinite tourmaline secondary quartzite which is mainly medium acid volcanic rock and is a highly silicified metamorphic rock formed by carrying out cross-substitution alteration in volcanic activity, the mineral component is mainly quartz, the content of silicon dioxide is more than 85 percent, and the content of kaolinite and tourmaline is 5-15 percent; the kaolinite tourmaline secondary quartzite is the subdivision of the secondary quartzite, associated kaolinite and tourmaline are formed ore, namely the secondary quartzite containing kaolinite tourmaline has larger specific surface area relative to quartz sand, the water-rock interaction is easier to promote, and trace elements such as Fe, Li and the like can be released. The feldspar quartz sandstone is preferably potassium feldspar quartz sandstone, is a subdivision of the feldspar quartz sandstone, is quartz sandstone containing potassium feldspar, and comprises the main mineral components of quartz, wherein the quartz content is less than 75%, and potassium feldspar, wherein the potassium feldspar content is more than 25%, the feldspar quartz sandstone is sandstone fracture, pore development, strong water permeability, large specific surface area, rich in trace element strontium, and can release minerals such as K, Si, Fe, Sr and the like through water-rock interaction.
In a preferred embodiment, the secondary quartzite and the feldspar quartzite are modified by the following steps: taking secondary quartzite and/or feldspar quartz sandstone, crushing, adding a citric acid aqueous solution, cleaning for 10-15h under the ultrasonic condition, cleaning by adopting deionized water, drying, roasting for 1-2h at the temperature of 350-450 ℃, cooling, grinding and screening. The secondary quartzite and feldspar and quartz sandstone are usually used for rough filtration in water treatment, and the main reason is that the main components of the two kinds of rocks are silicon dioxide, and the silicon dioxide is difficult to dissolve and achieve the mineralization effect under the interaction of water and rock; the secondary quartzite and the feldspar quartzite are used for mineralizing water after being modified, impurities are removed from the modified secondary quartzite and the feldspar quartzite, the specific surface area of particles is increased, the crystal defects and the development of corrosion cavities of the particles are aggravated by high-temperature roasting, the dissolution of silicon dioxide in the water is accelerated, and metasilicic acid is formed, so that mineral elements such as Fe, K, Li, Si, Sr and the like are supplemented for the mineralized water.
In a preferred embodiment, the particle sizes of the rhodochrosite, the zeolite, the activated carbon particles and the activated carbon fibers are all 80 to 200 mesh. The addition of the rhodochrosite can supplement two mineral substances of iron and zinc for mineralized water, so as to supplement two trace elements of iron and zinc necessary for the growth of infants; the zeolite can adsorb heavy metal elements in the softened water, and meanwhile, the heavy metal content of the zeolite is very low, so that the phenomenon that the content of the heavy metal in the mineralized water exceeds the standard is avoided; the activated carbon particles and the activated carbon fibers are matched for use, so that the strength of the filter material is improved, and the adsorption performance of the filter material is improved, thereby fully removing impurities in softened water.
In a preferred embodiment, the rhodochrosite is modified by the following method: pulverizing and mixing iron rhodochrosite and zinc rhodochrosite, soaking in sodium bicarbonate solution, activating for 1-3h, washing with deionized water under ultrasonic condition for 1-2h, drying at 70-90 deg.C in carbon dioxide atmosphere, cooling, grinding, and sieving. The rhodochrosite is formed by combining the iron rhodochrosite and the zinc rhodochrosite, the iron rhodochrosite and the zinc rhodochrosite can release more trace elements such as iron, zinc and the like after being modified, and the iron rhodochrosite and the zinc rhodochrosite react with baking soda by soaking in baking soda solution to achieve the purpose of activation, and meanwhile, the modified rhodochrosite has good adsorption performance on fluorine, arsenic, manganese and the like.
In a preferred embodiment, the zeolite is modified by a method comprising: taking phillipsite and analcime, crushing, mixing, introducing water vapor by taking inert gas as a carrier at 600 ℃ of 500 plus materials, heating for reaction for 3-5h, naturally cooling in the inert gas atmosphere, putting the cooled zeolite into 0.4-0.6mol/L salt solution according to the solid-liquid weight ratio of 1:4-6 for soaking, activating for 24-48h, then cleaning by using deionized water, drying, cooling, grinding, screening and carrying out microwave modification treatment for 10-20 h. The zeolite is aluminosilicate ore, and can release a large amount of aluminum elements in the dissolving process, and the zeolite consists of phillipsite and analcime, and can reduce the precipitation of the aluminum elements through aluminum fixation modification; the phillipsite is a rare mineral product, the heavy metal content is extremely low, the modified phillipsite can release mineral substances such as Ca, K and the like, and the analcime shows unique 'ionic sieve' characteristics after being modified, and can adsorb heavy metal in water.
The preparation method of the mineral filter material is mainly realized by the following technical scheme: the method comprises the following steps: 1) sequentially taking secondary quartzite, feldspar quartz sandstone, rhodochrosite and zeolite, and performing modification treatment to respectively obtain secondary quartzite particles, feldspar quartz sandstone particles, rhodochrosite particles and zeolite particles; 2) mixing and uniformly stirring activated carbon particles, activated carbon fibers, a binder, the secondary quartzite particles, the feldspar quartzite particles, the rhodochrosite particles and the zeolite particles obtained in the step 1) to obtain a mixture; 3) and (3) placing the mixture obtained in the step 2) into a hydraulic die, sintering at the temperature of 150 ℃ and 160 ℃ and under the pressure of 12-18MPa for 20-60min to obtain the filter material.
The natural rock material is modified to improve the performance of the natural rock material, is prepared into uniform particles, is better mixed with activated carbon particles, activated carbon fibers and a binder, and is modified, mixed and sintered to obtain a filter material which can stably release mineral substances beneficial to the growth and development of infants; typically, the binder is polyethylene.
The invention relates to a mineral filter element, which is mainly realized by the following technical scheme: the mineral filter material is characterized by comprising a shell, wherein the mineral filter material is arranged in the shell, and cushion pads and sealing gaskets are arranged at two ends of the shell. The softened water, also called pure water, is usually drinking water treated by reverse osmosis technology, and after the pure water is filtered by a filter element obtained by the filter material of the invention, the TDS of the water is kept at 10-40mg/L, thus obviously improving the content of trace elements necessary for the growth of infants. The filter element is green and environment-friendly, the trace elements are separated out quickly, no heavy metal is separated out in the mineralization process, secondary pollution to the mineralized water is avoided, and the obtained mineralized water does not exceed the standard of the heavy metal. The mineral filter element is particularly suitable for infant water purifiers, is a maternal and infant mineralization filter element based on natural rock materials, can stably release minerals beneficial to the growth and development of infants, and ensures that the quality of purified water subjected to reverse osmosis desalination is more suitable for the infants after being remineralized by the filter element.
The invention relates to a preparation method of a mineral filter element, which is mainly realized by the following technical scheme: the method comprises the following steps: a. preparing a filter material according to the preparation method of the mineral filter element of claim 8; b. taking a shell, filling the filter material obtained in the step a) into the shell, sequentially putting a buffer pad and a sealing pad at two ends of the shell, and fixing and melting in a rotating manner to obtain the filter element. The filter element is formed by placing the filter material in a plastic shell, placing a cushion pad and a sealing pad at two ends of the plastic shell and then fixing and melting the cushion pad and the sealing pad, and the shell is usually injection-molded by polylactic acid plastic, so that the filter element is light in weight and convenient to use. According to the preparation method of the filter element, the natural rock materials are modified, meanwhile, the mineral filter material is obtained after the rock materials are reasonably proportioned, mixed and sintered, and the filter material is filled in the shell, so that the filter element capable of stably releasing minerals beneficial to the growth and development of infants is obtained.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, secondary quartzite, feldspar quartz sandstone, iron-diamondite, zinc-diamondite, phillipsite and analcite are reasonably matched by utilizing a natural rock material to obtain a filter material which can stably release minerals beneficial to the growth and development of infants; the filter material can reduce the TDS of the purified water, after the purified water subjected to reverse osmosis desalination is remineralized by the filter material, the TDS of the mineralized water is kept at 10-40mg/L, the content of beneficial mineral substances in the mineralized water is improved, and the obtained water is more suitable for infants to drink, is particularly suitable for infant water purifiers, and is a mother and infant mineralized filter material based on natural rock materials; the filter material is green and environment-friendly, trace elements are quickly separated out in the mineralization process, no heavy metal is separated out, secondary pollution to the mineralized water is avoided, and the obtained mineralized water does not exceed the standard of the heavy metal. The preparation method of the filter material is simple, convenient to operate, free of special requirements for equipment, easy to realize industrialization, economical and practical, capable of preparing the filter element particularly suitable for the infant water purifier, and good in market prospect.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a mineral filter material which comprises the following raw materials in parts by weight: 9-24 parts of secondary quartzite, 3-8 parts of feldspar quartz sandstone, 2-5 parts of rhodochrosite, 20-40 parts of zeolite, 10-30 parts of activated carbon particles, 5-20 parts of activated carbon fibers and 20-40 parts of a binder; the rhodochrosite is a mixture of iron rhodochrosite and zinc rhodochrosite in a weight ratio of 1-3:2, and the zeolite is a mixture of phillipsite and analcime in a weight ratio of 1-3: 1.
Preferably, the particle size of the secondary quartzite is 1-8 mu m, the effective porosity is 20-25%, and the specific surface area is 0.55-0.65m2(ii)/g; the particle size of the feldspar quartz sandstone is 1-8 mu m, the effective porosity is 70-80%, and the specific surface area is 4.00-5.00m2/g。
Specifically, the weight ratio of the secondary quartzite to the feldspar quartz sandstone is 2-4: 1.
Further, the secondary quartzite and the feldspar quartz sandstone are both formed by modification, and the modification method of the secondary quartzite and the feldspar quartz sandstone comprises the following steps: taking secondary quartzite and/or feldspar quartz sandstone, crushing, adding a citric acid aqueous solution, cleaning for 10-15h under the ultrasonic condition, cleaning by adopting deionized water, drying, roasting for 1-2h at the temperature of 350-450 ℃, cooling, grinding and screening.
More specifically, the particle sizes of the rhodochrosite, the zeolite, the activated carbon particles and the activated carbon fibers are all 80-200 meshes.
Furthermore, the rhodochrosite is modified, and the modification method of the rhodochrosite comprises the following steps: pulverizing and mixing iron rhodochrosite and zinc rhodochrosite, soaking in sodium bicarbonate solution, activating for 1-3h, washing with deionized water under ultrasonic condition for 1-2h, drying at 70-90 deg.C in carbon dioxide atmosphere, cooling, grinding, and sieving.
More preferably, the zeolite is modified by a method comprising: taking phillipsite and analcime, crushing, mixing, introducing water vapor by taking inert gas as a carrier at 600 ℃ of 500 plus materials, heating for reaction for 3-5h, naturally cooling in the inert gas atmosphere, putting the cooled zeolite into 0.4-0.6mol/L salt solution according to the solid-liquid weight ratio of 1:4-6 for soaking, activating for 24-48h, then cleaning by using deionized water, drying, cooling, grinding, screening and carrying out microwave modification treatment for 10-20 h.
The preparation method of the mineral filter material comprises the following steps: 1) sequentially taking secondary quartzite, feldspar quartz sandstone, rhodochrosite and zeolite, and performing modification treatment to respectively obtain secondary quartzite particles, feldspar quartz sandstone particles, rhodochrosite particles and zeolite particles; 2) mixing and uniformly stirring activated carbon particles, activated carbon fibers, a binder, the secondary quartzite particles, the feldspar quartzite particles, the rhodochrosite particles and the zeolite particles obtained in the step 1) to obtain a mixture; 3) and (3) placing the mixture obtained in the step 2) into a hydraulic die, sintering at the temperature of 150 ℃ and 160 ℃ and under the pressure of 12-18MPa for 20-60min to obtain the filter material.
The mineral filter element comprises a shell, wherein any mineral filter material is arranged in the shell, and buffer pads and sealing gaskets are arranged at two ends of the shell.
The preparation method of the mineral filter element comprises the following steps: a. preparing a filter material according to the preparation method of the mineral filter element; b. taking a shell, filling the filter material obtained in the step a) into the shell, sequentially putting a buffer pad and a sealing pad at two ends of the shell, and fixing and melting in a rotating manner to obtain the filter element.
Example one
The preparation method of the mineral filter material comprises the following steps:
1) weighing the following raw materials in parts by weight: the secondary quartzite is 12g, the feldspar quartz sandstone is 4g, the rhodochrosite is 3g, the zeolite is 35g, the activated carbon particles are 25g, the activated carbon fibers are 10g, and the binder is 35 g; wherein the rhodochrosite is a mixture of iron rhodochrosite and zinc rhodochrosite in a weight ratio of 3:2, and the zeolite is a mixture of phillipsite and analcime in a weight ratio of 3: 1;
2) sequentially taking secondary quartzite, feldspar quartz sandstone, rhodochrosite and zeolite, and performing modification treatment to respectively obtain secondary quartzite particles, feldspar quartz sandstone particles, rhodochrosite particles and zeolite particles;
3) mixing and uniformly stirring activated carbon particles, activated carbon fibers, a binder, the secondary quartzite particles, the feldspar quartzite particles, the rhodochrosite particles and the zeolite particles obtained in the step 2) to obtain a mixture;
4) and (3) putting the mixture obtained in the step 3) into a hydraulic die, sintering at the temperature of 150 ℃ and the pressure of 12MPa for 20min to obtain the filter material.
The preparation method of the mineral filter element comprises the following steps: and (3) taking a shell, filling the filter material obtained by the method into the shell, sequentially putting a buffer pad and a sealing pad at two ends of the shell, and fixing and melting in a rotating manner to obtain the filter element.
Example two
The preparation method of the mineral filter material comprises the following steps:
1) weighing the following raw materials in parts by weight: 36g of kaolinite tourmaline secondary quartzite, 12g of feldspar quartz sandstone, 5g of rhodochrosite, 46g of zeolite, 20g of activated carbon particles, 30g of activated carbon fiber and 60g of binder; wherein the rhodochrosite is a mixture of iron rhodochrosite and zinc rhodochrosite in a weight ratio of 1:2, and the zeolite is a mixture of phillipsite and analcime in a weight ratio of 1: 1;
2) taking kaolinite tourmaline secondary quartzite and feldspar quartz sandstone, crushing, mixing, adding a citric acid aqueous solution with the mass concentration of 5%, washing for 12 hours under the ultrasonic condition, washing by using deionized water, drying, roasting for 1 hour at 400 ℃, cooling, grinding and screening to obtain secondary quartzite and feldspar quartz sandstone mixed particles;
3) taking and crushing the iron rhodochrosite and the zinc rhodochrosite, mixing, soaking in a sodium bicarbonate solution with the mass concentration of 20%, activating for 2 hours, washing for 1 hour by adopting deionized water under the ultrasonic condition, drying in a carbon dioxide atmosphere at the temperature of 80 ℃, cooling, grinding and screening to obtain rhodochrosite particles;
4) taking phillipsite and analcime, crushing, mixing, introducing water vapor at 500 ℃ by taking helium as a carrier, wherein the flow rate of the helium is 2mL/min, the flow rate ratio of the helium to the water vapor is 1:1, heating for reaction for 4 hours, naturally cooling in the helium atmosphere, soaking the cooled zeolite in 0.4mol/L salt solution according to the solid-liquid weight ratio of 1:5, activating for 24 hours, then washing with deionized water, drying, cooling, grinding, screening, and performing microwave modification treatment for 12 hours to obtain zeolite particles;
5) mixing and uniformly stirring activated carbon particles, activated carbon fibers, a binder, the secondary quartzite and feldspar and quartz sandstone mixed particles obtained in the step 2), the rhodochrosite particles obtained in the step 3) and the zeolite particles obtained in the step 4) to obtain a mixture;
6) and (3) putting the mixture obtained in the step 5) into a hydraulic die, sintering at the temperature of 150 ℃ and the pressure of 15MPa for 30min to obtain the filter material.
The preparation method of the mineral filter element comprises the following steps: and (3) taking a shell, filling the filter material obtained by the method into the shell, sequentially putting a buffer pad and a sealing pad at two ends of the shell, and fixing and melting in a rotating manner to obtain the filter element.
EXAMPLE III
The preparation method of the mineral filter material comprises the following steps:
1) weighing the following raw materials in parts by weight: 9g of secondary quartzite, 3g of feldspar quartz sandstone, 2g of rhodochrosite, 20g of zeolite, 10g of activated carbon particles, 5g of activated carbon fiber and 20g of binder; wherein the rhodochrosite is a mixture of iron rhodochrosite and zinc rhodochrosite in a weight ratio of 1:2, and the zeolite is a mixture of phillipsite and analcime in a weight ratio of 1: 1;
2) taking secondary quartzite and feldspar quartzite, crushing, mixing, adding a citric acid aqueous solution with the mass concentration of 30%, washing for 12 hours under the ultrasonic condition, washing by using deionized water, fully drying in an oven, roasting and modifying a dried sample at 400 ℃ for 1 hour, fully grinding after the sample is cooled, and sieving by using a 200-mesh sieve to obtain secondary quartzite and feldspar quartzite mixed particles;
3) taking and crushing the iron-rhodochrosite and the zinc-rhodochrosite, mixing, soaking in a sodium bicarbonate solution with the mass concentration of 20%, activating for 2 hours, washing for 1 hour by adopting deionized water under the ultrasonic condition, fully drying in a carbon dioxide atmosphere at the temperature of 80 ℃, fully grinding after a sample is cooled, and sieving by a 200-mesh sieve to obtain rhodochrosite particles;
4) taking phillipsite and analcime, crushing, mixing, putting into a high-temperature reaction furnace, introducing water vapor by taking helium as a carrier at 500 ℃, wherein the flow rate of the helium is 2mL/min, the flow rate ratio of the helium to the water vapor is 1:1, heating for reaction for 4 hours, naturally cooling in the helium atmosphere, putting the cooled zeolite into 0.4mol/L of salt solution according to the solid-liquid weight ratio of 1:5, soaking, activating for 24 hours, then cleaning by using deionized water, fully drying, fully grinding after a sample is cooled, sieving by using a 200-mesh sieve, and then putting the obtained powder into microwave equipment for microwave modification treatment for 12 hours to obtain zeolite particles;
5) mixing and uniformly stirring activated carbon particles, activated carbon fibers, a binder, the secondary quartzite and feldspar and quartz sandstone mixed particles obtained in the step 2), the rhodochrosite particles obtained in the step 3) and the zeolite particles obtained in the step 4) to obtain a mixture;
4) and (3) putting the mixture obtained in the step 3) into a hydraulic die, sintering at the temperature of 150 ℃ and the pressure of 15MPa for 30min to obtain the filter material.
The preparation method of the mineral filter element comprises the following steps: and (3) taking a shell, filling the filter material obtained by the method into the shell, sequentially putting a buffer pad and a sealing pad at two ends of the shell, and fixing and melting in a rotating manner to obtain the filter element.
The filter element prepared in the first to third embodiments of the present invention, the filter element (i.e., the first control sample) made of the secondary quartzite modified by the method in the third embodiment of the present invention, and the existing commercially available filter element (i.e., the second control sample) are respectively used for mineralizing the purified water after reverse osmosis desalination, and the contents of TDS, Ca, Mg, Na, K, Zn, Fe, Sr, Li, and heavy metals in the mineralized water body are measured, and the experimental results are shown in table 1.
TABLE 1 Performance index of mineralized water obtained from different filter elements
As can be seen from Table 1, the TDS in the purified water after reverse osmosis desalination is reduced to 6Mg/L, meanwhile, the contents of Ca, Mg and K are also greatly reduced, the content of Ca is only 0.4Mg/L, the content of Mg cannot be detected, the content of K is only 0.2Mg/L, and secondly, the contents of Zn, Fe, Sr and Li cannot be detected, which fully indicates that after the drinking water is treated by the reverse osmosis technology, pollutants in the water are removed, and the TDS is reduced to a very low level; however, the reverse osmosis technology filters water too clean, so that a large amount of mineral substances in the water are lost, and mineral substances necessary for human bodies cannot be supplemented in time. After the purified water is mineralized by the filter element, the TDS of the purified water can be stably maintained at 10-40Mg/L, meanwhile, the contents of Ca, Mg and K are greatly increased, the content of Na is maintained at 0.9-2.0Mg/L, and then, four mineral elements of Zn, Fe, Sr and Li are supplemented, so that the requirements of trace elements required by the growth of infants are met; meanwhile, the mineralized water obtained by mineralizing the purified water by the filter element provided by the invention has no heavy metal detected in an experiment, which shows that no heavy metal is separated out, secondary pollution to the mineralized water is avoided, and the phenomenon that the heavy metal exceeds the standard is avoided. However, after the purified water is mineralized by the filter element made of modified secondary quartzite in the prior art, namely the control sample I and the existing commercial filter element, namely the control sample II, the mineral content of the purified water is basically unchanged, which indicates that the mineral substances in the existing filter element are not rapidly separated out, and the mineralization process of the purified water does not play a substantial role.
Therefore, compared with the prior art, the invention has the beneficial effects that: compared with the prior art, the invention has the beneficial effects that: according to the invention, secondary quartzite, feldspar quartz sandstone, iron-diamondite, zinc-diamondite, phillipsite and analcite are reasonably matched by utilizing a natural rock material to obtain a filter material which can stably release minerals beneficial to the growth and development of infants; the filter material can reduce the TDS of the purified water, after the purified water subjected to reverse osmosis desalination is remineralized by the filter material, the TDS of the mineralized water is kept at 10-40mg/L, the content of beneficial mineral substances in the mineralized water is improved, and the obtained water is more suitable for infants to drink, is particularly suitable for infant water purifiers, and is a mother and infant mineralized filter material based on natural rock materials; the filter material is green and environment-friendly, trace elements are quickly separated out in the mineralization process, no heavy metal is separated out, secondary pollution to the mineralized water is avoided, and the obtained mineralized water does not exceed the standard of the heavy metal. The preparation method of the filter material is simple, convenient to operate, free of special requirements for equipment, easy to realize industrialization, economical and practical, capable of preparing the filter element particularly suitable for the infant water purifier, and good in market prospect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A mineral filter material, characterized in that: the feed comprises the following raw materials in parts by weight:
9-24 parts of secondary quartzite, 3-8 parts of feldspar quartz sandstone, 2-5 parts of rhodochrosite, 20-40 parts of zeolite, 10-30 parts of activated carbon particles, 5-20 parts of activated carbon fibers and 20-40 parts of a binder;
the rhodochrosite is a mixture of iron rhodochrosite and zinc rhodochrosite in a weight ratio of 1-3:2, and the zeolite is a mixture of phillipsite and analcime in a weight ratio of 1-3: 1.
2. The mineral filter of claim 1, wherein:
the secondary quartzite has particle size of 1-8 μm, effective porosity of 20-25%, and specific surface area of 0.55-0.65m2/g；
The particle size of the feldspar quartz sandstone is 1-8 mu m, the effective porosity is 70-80%, and the specific surface area is 4.00-5.00m2/g。
3. The mineral filter of claim 1, wherein:
the weight ratio of the secondary quartzite to the feldspar quartz sandstone is 2-4: 1.
4. The mineral filter of claim 1, wherein:
the secondary quartzite and the feldspar quartz sandstone are both formed by modification, and the modification method of the secondary quartzite and the feldspar quartz sandstone comprises the following steps: taking secondary quartzite and/or feldspar quartz sandstone, crushing, adding a citric acid aqueous solution, cleaning for 10-15h under the ultrasonic condition, cleaning by adopting deionized water, drying, roasting for 1-2h at the temperature of 350-450 ℃, cooling, grinding and screening.
5. The mineral filter of claim 1, wherein:
the particle sizes of the rhodochrosite, the zeolite, the activated carbon particles and the activated carbon fibers are all 80-200 meshes.
6. The mineral filter of claim 1, wherein:
the rhodochrosite is formed by modifying, and the modification method of the rhodochrosite comprises the following steps: pulverizing and mixing iron rhodochrosite and zinc rhodochrosite, soaking in sodium bicarbonate solution, activating for 1-3h, washing with deionized water under ultrasonic condition for 1-2h, drying at 70-90 deg.C in carbon dioxide atmosphere, cooling, grinding, and sieving.
7. The mineral filter of claim 1, wherein:
the zeolite is obtained by modification, and the modification method of the zeolite comprises the following steps: taking phillipsite and analcime, crushing, mixing, introducing water vapor by taking inert gas as a carrier at 600 ℃ of 500 plus materials, heating for reaction for 3-5h, naturally cooling in the inert gas atmosphere, putting the cooled zeolite into 0.4-0.6mol/L salt solution according to the solid-liquid weight ratio of 1:4-6 for soaking, activating for 24-48h, then cleaning by using deionized water, drying, cooling, grinding, screening and carrying out microwave modification treatment for 10-20 h.
8. The method of making a mineral filter of any of claims 1-7, wherein: the method comprises the following steps:
1) sequentially taking secondary quartzite, feldspar quartz sandstone, rhodochrosite and zeolite, and performing modification treatment to respectively obtain secondary quartzite particles, feldspar quartz sandstone particles, rhodochrosite particles and zeolite particles;
2) mixing and uniformly stirring activated carbon particles, activated carbon fibers, a binder, the secondary quartzite particles, the feldspar quartzite particles, the rhodochrosite particles and the zeolite particles obtained in the step 1) to obtain a mixture;
3) and (3) placing the mixture obtained in the step 2) into a hydraulic die, sintering at the temperature of 150 ℃ and 160 ℃ and under the pressure of 12-18MPa for 20-60min to obtain the filter material.
9. A mineral filter cartridge comprising a housing, characterized in that:
the mineral filter material as claimed in any one of claims 1 to 7 is provided in the housing, and both ends of the housing are provided with a buffer pad and a sealing pad.
10. A preparation method of a mineral filter element is characterized by comprising the following steps: the method comprises the following steps:
a. preparing a filter material according to the preparation method of the mineral filter element of claim 8;
b. taking a shell, filling the filter material obtained in the step a) into the shell, sequentially putting a buffer pad and a sealing pad at two ends of the shell, and fixing and melting in a rotating manner to obtain the filter element.
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