Mineralized filter element based on natural rock material as well as preparation method and application of mineralized filter element

Abstract

The invention provides a mineralized filter element based on a natural rock material as well as a preparation method and application of the mineralized filter element. The mineralized filter element is prepared from a main material and an auxiliary material, wherein the main material adopts a modified natural rock material, and specifically comprises modified celestite, modified medical stone, modified spodumene, modified zeolite, modified dolomite, modified sphalerite, modified magnesite and modified quartz porphyry; the auxiliary materials comprise activated carbon and a binder. The preparation method sequentially comprises the steps of modifying, burdening, canning, compacting, baking and demolding. Wherein the modification comprises the following steps: sequentially carrying out acid pickling, water washing, calcining, cooling, crushing and screening on the natural rock material, so as to obtain the modified natural rock material. Natural rock materials are extracted from the nature to be modified and added into the mineralization filter element, various mineral elements needed by the human body can be released, remineralization of low-mineralization-degree water is achieved, and large-scale application and popularization are facilitated.

Description

Technical Field

[0001] This invention belongs to the field of mineral materials technology, and relates to a mineralized filter element, particularly a mineralized filter element based on natural rock materials, its preparation method and application. Background Technology

[0002] Water is an essential commodity in people's daily lives, so ensuring the hygiene of drinking water is crucial for health. Currently, household water purifiers are becoming increasingly popular, providing safe and healthy drinking water solutions for family members. For example, reverse osmosis water purifiers use reverse osmosis membranes with a precision of up to 0.1 nm to purify tap water, achieving a desalination rate of up to 95%, effectively removing almost all impurities from the water. In areas where water quality varies significantly, this type of purifier provides a relatively reliable method of water purification. However, because almost all minerals are removed during the filtration process, long-term consumption of this purified water can have adverse effects on human health.

[0003] To address the aforementioned issues, two main solutions are available on the market: one is to use ultrafiltration as the primary filter material, ensuring that minerals are not filtered out during the filtration process; the other is to add a mineralized carbon rod filter element at the rear end of the reverse osmosis filter element, which can release the target minerals during use.

[0004] However, the first method mentioned above is difficult to filter out some small organic molecules, inorganic salts, and heavy metals during the filtration process. The second method can only release one or two target minerals during use, which is difficult to meet the human body's needs for multiple minerals. There is still considerable room for improvement. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a mineralized filter element based on natural rock materials, its preparation method, and its application. By extracting and modifying natural rock materials from nature and adding them to the mineralized filter element, various mineral elements required by the human body can be released, thereby achieving the remineralization of water with low mineralization, which is conducive to large-scale promotion and application.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a mineralized filter element based on natural rock material, the mineralized filter element being composed of main material and auxiliary material.

[0008] The main material is a modified natural rock material, specifically including modified celestite, modified maifanite, modified spodumene, modified zeolite, modified dolomite, modified sphalerite, modified magnesite, and modified quartz porphyry; the auxiliary materials include activated carbon and binder.

[0009] This invention extracts and modifies natural rock materials from nature, adding them to a mineralized filter cartridge. This process releases various mineral elements needed by the human body. Specifically, modified celestite mainly releases strontium, modified maifanite and modified dolomite mainly release calcium and magnesium, modified spodumene mainly releases lithium, modified sphalerite mainly releases zinc, modified magnesite mainly releases magnesium, modified quartz porphyry mainly releases calcium, and modified zeolite and activated carbon mainly adsorb heavy metals. This process achieves the remineralization of low-mineralized water, which is beneficial for large-scale application.

[0010] Preferably, the raw materials of the mineralized filter element, by weight, include:

[0011]

[0012] The modified celestite comprises 2-5 parts by weight, for example, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, or 5 parts; the modified maifanite comprises 5-20 parts by weight, for example, 5 parts, 6 parts, 8 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, or 20 parts; and the modified spodumene comprises 2-5 parts by weight, for example, 2 parts, 2.5 parts, or 3 parts. The modified zeolite is 3.5 parts, 4 parts, 4.5 parts, or 5 parts by weight, and the modified zeolite is 5-20 parts by weight, for example, 5 parts, 6 parts, 8 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, or 20 parts by weight. The modified dolomite is 5-10 parts by weight, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, or 10 parts by weight. The modified sphalerite is 2-10 parts by weight, for example, 2 parts, 3.5 parts, 4 parts, 4.5 parts, or 5 parts by weight. The modified magnesite is present in weight portions of 5-10 parts, for example, 5, 6, 7, 8, 9, or 10 parts; the modified quartz porphyry is present in weight portions of 2-10 parts, for example, 2, 3, 4, 5, 6, 7, 8, 9, or 10 parts; and the activated carbon is present in weight portions of 20-40 parts, for example, 3, 4, 5, 6, 7, 8, 9, or 10 parts. The amounts are 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, or 40 parts, and the weight of the adhesive is 10-30 parts, for example, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, or 30 parts, but are not limited to the listed values; other unlisted values ​​within this range are also applicable.

[0013] Preferably, the mass ratio of calcium to magnesium in the mineralized filter element is (1-4):1, for example, it can be 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1 or 4:1, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0014] In this invention, the mass ratio of calcium and magnesium is adjusted by the mixing ratio of modified zeolite, modified dolomite and modified magnesite. As long as the mass ratio of calcium and magnesium is within the range of (1-4):1, no special limitation is made on the mixing ratio of modified zeolite, modified dolomite and modified magnesite.

[0015] This invention adjusts the mass ratio of calcium and magnesium elements within the range of (1-4):1 by mixing modified zeolite, modified dolomite, and modified magnesite, which helps to significantly reduce the risk of kidney stones in humans and improve drinking water safety.

[0016] In a second aspect, the present invention provides a method for preparing a mineralized filter element as described in the first aspect, the method comprising sequentially performing modification, batching, filling, compaction, baking and demolding.

[0017] The modification includes: sequentially subjecting natural rock material to acid washing, water washing, calcination, cooling, crushing and sieving to obtain modified natural rock material.

[0018] Preferably, the pickling is performed using a hydrochloric acid solution, and the concentration of the hydrochloric acid solution is 0.5-1.5 mol / L, for example, it can be 0.5 mol / L, 0.6 mol / L, 0.7 mol / L, 0.8 mol / L, 0.9 mol / L, 1.0 mol / L, 1.1 mol / L, 1.2 mol / L, 1.3 mol / L, 1.4 mol / L or 1.5 mol / L, but is not limited to the listed values, other unlisted values ​​within this range are also applicable.

[0019] Preferably, the washing process uses deionized water until the surface of the natural rock material is neutral.

[0020] Preferably, the calcination temperature is 800-1200℃, for example, 800℃, 850℃, 900℃, 950℃, 1000℃, 1050℃, 1100℃, 1150℃ or 1200℃, and the time is 30-120min, for example, 30min, 40min, 50min, 60min, 70min, 80min, 90min, 100min, 110min or 120min, but is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0021] Preferably, the mesh size of the sieve is 125-300 mesh, for example, it can be 125 mesh, 140 mesh, 160 mesh, 180 mesh, 200 mesh, 220 mesh, 240 mesh, 260 mesh, 280 mesh or 300 mesh, but it is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0022] Preferably, the ingredients include: weighing the main ingredients and auxiliary ingredients according to the weight proportions and mixing them evenly.

[0023] Preferably, the filling is carried out in a mold.

[0024] Preferably, the compaction pressure is 0.4-1.2 MPa, for example, it can be 0.4 MPa, 0.5 MPa, 0.6 MPa, 0.7 MPa, 0.8 MPa, 0.9 MPa, 1.0 MPa, 1.1 MPa or 1.2 MPa, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0025] Preferably, the baking temperature is 180-250℃, for example, 180℃, 190℃, 200℃, 210℃, 220℃, 230℃, 240℃ or 250℃, and the time is 90-120min, for example, 90min, 95min, 100min, 105min, 110min, 115min or 120min, but is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0026] As a preferred embodiment of the second aspect of the present invention, the preparation method includes the following steps:

[0027] (1) Modification: The natural rock material is acid-washed with a hydrochloric acid solution with a concentration of 0.5-1.5mol / L, and then washed with deionized water until the surface of the natural rock material is neutral. Then it is calcined at 800-1200℃ for 30-120min to remove impurities. After natural cooling, it is crushed and sieved to obtain 125-300 mesh modified natural rock material as the main material.

[0028] (2) Ingredients: Weigh the main ingredients and auxiliary ingredients according to the weight proportions and mix them evenly;

[0029] (3) Filling: The mixed main ingredients and auxiliary ingredients are filled into the mold;

[0030] (4) Compaction: Control the applied compaction pressure to 0.4-1.2 MPa;

[0031] (5) Baking: Place the compacted mold into an oven and set the baking temperature to 180-250℃ for 90-120 minutes.

[0032] (6) Demolding.

[0033] Thirdly, the present invention provides an application of the mineralized filter element as described in the first aspect, wherein the mineralized filter element is used to purify drinking water.

[0034] The numerical range described in this invention includes not only the point values ​​listed above, but also any point values ​​within the numerical ranges not listed above. Due to space limitations and for the sake of brevity, this invention will not exhaustively list all the specific point values ​​included in the range.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] This invention extracts and modifies natural rock materials from nature, adding them to a mineralized filter cartridge. This process releases various mineral elements needed by the human body. Specifically, modified celestite mainly releases strontium, modified maifanite and modified dolomite mainly release calcium and magnesium, modified spodumene mainly releases lithium, modified sphalerite mainly releases zinc, modified magnesite mainly releases magnesium, modified quartz porphyry mainly releases calcium, and modified zeolite and activated carbon mainly adsorb heavy metals. This process achieves the remineralization of low-mineralized water, which is beneficial for large-scale application. Detailed Implementation

[0037] The technical solution of the present invention will be further illustrated below through specific embodiments.

[0038] Examples 1-6

[0039] The embodiments in this group provide a mineralized filter element based on natural rock material. The raw materials of the mineralized filter element are shown in Table 1 below by weight.

[0040] Table 1

[0041]

[0042] In the table above, the activated carbon is specifically selected from coconut shell carbon, and the binder is SG-1 type polyvinyl chloride.

[0043] The preparation method of the mineralized filter element obtained in Examples 1-6 includes the following steps:

[0044] (1) Modification: The natural rock material was acid-washed with a hydrochloric acid solution with a concentration of 1 mol / L, and then washed with deionized water until the surface of the natural rock material was neutral. Then it was calcined at 1000℃ for 80 min to remove impurities. After natural cooling, it was crushed and sieved to obtain 200 mesh modified natural rock material as the main material.

[0045] (2) Ingredients: Weigh the main ingredients and auxiliary ingredients according to the weight proportions and mix them evenly;

[0046] (3) Filling: The mixed main ingredients and auxiliary ingredients are filled into the mold;

[0047] (4) Compaction: The compaction pressure is controlled at 0.8 MPa;

[0048] (5) Baking: Place the compacted mold into an oven and set the baking temperature to 220℃ and the time to 200min;

[0049] (6) Demolding.

[0050] Comparative Examples 1-7

[0051] This group provides a mineralized filter element based on natural rock material. The raw materials of the mineralized filter element are shown in Table 2 below, according to parts by weight.

[0052] Table 2

[0053]

[0054] In the table above, the activated carbon is specifically selected from coconut shell carbon, and the binder is SG-1 type polyvinyl chloride.

[0055] The preparation methods of the mineralized filter elements obtained in Comparative Examples 1-7 are the same as those in Examples 1-6, so they will not be repeated here.

[0056] Performance testing

[0057] Under room temperature conditions, water flow tests were conducted on the mineralized filter cartridges obtained in Examples 1-6 and Comparative Examples 1-7, respectively. The pure water flow rate was controlled at 2.0 L / min. When the water flow reached 1000 L, 250 mL of water sample was taken for testing. The relevant test results are shown in Table 3 below.

[0058] Table 3

[0059]

[0060] As shown in the table above, the effluent from the multi-mineralized filter cartridges provided in Examples 1-6 contains various mineral elements essential for the human body, with an Sr content ≥0.2 mg / L, meeting the national mineral water standard. Furthermore, the overall mineralization is low, preventing scale buildup in the effluent. Compared to Example 1, Comparative Examples 1-7 removed certain natural rock materials, resulting in lower levels of corresponding mineral elements in the effluent compared to Example 1.

[0061] Therefore, this invention extracts and modifies natural rock materials from nature, adds them to the mineralized filter element, and can release a variety of mineral elements needed by the human body. Specifically, the modified celestite mainly releases strontium, the modified maifanite and modified dolomite mainly release calcium and magnesium, the modified spodumene mainly releases lithium, the modified sphalerite mainly releases zinc, the modified magnesite mainly releases magnesium, the modified quartz porphyry mainly releases calcium, and the modified zeolite and activated carbon mainly adsorb heavy metals. This achieves the remineralization of low-mineralized water, which is conducive to large-scale promotion and application.

[0062] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mineralized filter element based on natural rock material, characterized in that, The mineralized filter element is composed of main materials and auxiliary materials; The main material is a modified natural rock material, specifically including modified celestite, modified maifanite, modified spodumene, modified zeolite, modified dolomite, modified sphalerite, modified magnesite, and modified quartz porphyry; the auxiliary materials include activated carbon and binder.

2. The mineralized filter element according to claim 1, characterized in that, The raw materials of the mineralized filter element, by weight, include:

3. The mineralized filter element according to claim 1 or 2, characterized in that, The calcium-magnesium ratio in the mineralized filter element is (1-4):1, and the calcium-magnesium ratio is adjusted by the mixing ratio of modified zeolite, modified dolomite and modified magnesite.

4. A method for preparing a mineralized filter element as described in any one of claims 1-3, characterized in that, The preparation method includes the following steps performed sequentially: modification, ingredient mixing, filling, compaction, baking, and demolding. The modification includes: sequentially subjecting natural rock material to acid washing, water washing, calcination, cooling, crushing and sieving to obtain modified natural rock material.

5. The preparation method according to claim 4, characterized in that, The pickling process uses hydrochloric acid solution, and the concentration of the hydrochloric acid solution is 0.5-1.5 mol / L; Preferably, the washing process uses deionized water until the surface of the natural rock material is neutral.

6. The preparation method according to claim 4 or 5, characterized in that, The calcination temperature is 800-1200℃, and the time is 30-120 min; Preferably, the sieve mesh size is 125-300 mesh.

7. The preparation method according to any one of claims 4-6, characterized in that, The ingredients include: weighing the main ingredients and auxiliary ingredients according to the weight proportions and mixing them evenly; Preferably, the filling is carried out in a mold.

8. The preparation method according to any one of claims 4-7, characterized in that, The compaction pressure is 0.4-1.2 MPa; Preferably, the baking temperature is 180-250℃ and the baking time is 90-120 minutes.

9. The preparation method according to any one of claims 4-8, characterized in that, The preparation method includes the following steps: (1) Modification: The natural rock material is acid-washed with a hydrochloric acid solution with a concentration of 0.5-1.5mol / L, and then washed with deionized water until the surface of the natural rock material is neutral. Then it is calcined at 800-1200℃ for 30-120min to remove impurities. After natural cooling, it is crushed and sieved to obtain 125-300 mesh modified natural rock material as the main material. (2) Ingredients: Weigh the main ingredients and auxiliary ingredients according to the weight proportions and mix them evenly; (3) Filling: The mixed main ingredients and auxiliary ingredients are filled into the mold; (4) Compaction: Control the applied compaction pressure to 0.4-1.2 MPa; (5) Baking: Place the compacted mold into an oven and set the baking temperature to 180-250℃ for 90-120 minutes. (6) Demolding.

10. An application of the mineralized filter element as described in any one of claims 1-3, characterized in that, The mineralized filter element is used to purify drinking water.

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