Mineralized filter cartridge, method of making same, and water purifier

Abstract

The application discloses a mineralized filter element and a preparation method thereof and a water purifier. The mineralized filter element comprises a shell and a first filter element, a second filter element and a third filter element filled in the shell. The first filter element comprises calcareous cement filter material and modified sphalerite, the calcareous cement filter material comprises modified calcareous mudstone slurry and modified anorthite; the second filter element comprises an analcime composite material, the analcime composite material comprises modified analcime, activated carbon, chitin and a binder; and the third filter element comprises a sodium feldspar composite material, the sodium feldspar composite material comprises modified sodium feldspar, activated carbon, chitin and a binder. The application aims at solving the problem of poor taste of existing drinking water filtered by a reverse osmosis membrane.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drinking water, in particular to a mineralization filter element, a preparation method thereof and a water purifier. BACKGROUND

[0002] The water purifier is also called water purifier, water purifier, which is a water treatment equipment for deep filtration and purification of water according to the use requirements of water. The water purifier usually adopts reverse osmosis membrane filtration technology. This technology can remove almost all pollutants in drinking water and ensure water safety. However, while removing pollutants, it also reduces the mineral content in water, producing water containing almost no minerals, which has poor taste and brings bad user experience. SUMMARY

[0003] In view of this, the present application provides a mineralization filter element, a preparation method thereof and a water purifier, aiming to solve the problem of poor taste of existing drinking water filtered by reverse osmosis membrane.

[0004] The present application is implemented as follows:

[0005] In a first aspect, the present application provides a mineralization filter element, comprising a shell and a first filter element, a second filter element and a third filter element filled in the shell, wherein:

[0006] The first filter element comprises calcareous cemented filter material and modified sphalerite, and the calcareous cemented filter material comprises modified calcareous mud slurry and modified anorthite;

[0007] The second filter element comprises an analcite composite material, and the analcite composite material comprises modified analcite, activated carbon, chitin and a binder;

[0008] The third filter element comprises a sodium feldspar composite material, and the sodium feldspar composite material comprises modified sodium feldspar, activated carbon, chitin and a binder.

[0009] Optionally, in some embodiments of the present application, the first filter element comprises 20-35 parts of the calcareous cemented filter material and 5-10 parts of the modified sphalerite; and / or,

[0010] The calcareous cemented filter material comprises 20-30 parts of modified calcareous mud slurry and 2-5 parts of modified anorthite; and / or,

[0011] The analcite composite material comprises 20-30 parts of modified analcite, 30-50 parts of activated carbon, 10-20 parts of chitin and 15-25 parts of a binder; and / or,

[0012] The sodium feldspar composite material comprises 20-30 parts of modified sodium feldspar, 30-50 parts of activated carbon, 10-20 parts of chitin and 15-25 parts of a binder.

[0013] Optionally, in some embodiments of the present application, the modified calcareous mud slurry is a slurry obtained by acid modification of calcareous mud; and / or,

[0014] The modified anorthite is an anorthite modified by acid; and / or,

[0015] The modified sphalerite is a sphalerite modified by roasting; and / or,

[0016] The modified anorthite is an anorthite modified by acid; and / or,

[0017] The raw material of the modified albite comprises acid-modified albite, limestone, deionized water and sodium silicate, and the weight ratio of the acid-modified albite, limestone, deionized water and sodium silicate is 10: (2-5): (40-100): (1-3); and / or,

[0018] The particle size of the modified anorthite is 200-300 meshes; and / or,

[0019] The particle size of the calcareous cement filter material is 30-60 meshes.

[0020] Optionally, in some embodiments of the present application, the shell has a water inlet and a water outlet, and the first filter core, the second filter core and the third filter core are sequentially arranged along the water flow direction from the water inlet to the water outlet.

[0021] Optionally, in some embodiments of the present application, the mineralization filter core further comprises PP cotton arranged between the first filter core and the second filter core.

[0022] Optionally, in some embodiments of the present application, the second filter core is a first cylinder body with both ends open, and a first gap is formed between the outer circumferential side of the first cylinder body and the shell; the third filter core is a second cylinder body with both ends open, and a second gap is formed between the outer circumferential side of the second cylinder body and the shell.

[0023] The mineralization filter core further comprises a first partition plate arranged between the first filter core and the second filter core and a second partition plate arranged between the second filter core and the third filter core, the first partition plate is provided with a first through hole corresponding to the center area of the opening of the first cylinder body, and the second partition plate is provided with a second through hole corresponding to the annular area of the first gap.

[0024] In a second aspect, the present application further provides a preparation method of a mineralization filter core, comprising the following steps:

[0025] The calcareous mudstone, the anorthite, the sphalerite, the analcime and the albite are respectively modified to obtain modified calcareous mudstone slurry, modified anorthite, modified sphalerite, modified analcime and modified albite;

[0026] The modified calcareous mudstone slurry and the modified anorthite are mixed and dehydrated, and after being cemented into blocks, the modified calcareous mudstone slurry and the modified anorthite are crushed to obtain calcareous cemented filter material;

[0027] The calcareous cemented filter material and the modified sphalerite are mixed to obtain a primary filter core;

[0028] The modified analcime, the activated carbon, the chitin and the binder are mixed and then are pressed to form a secondary filter core;

[0029] The modified albite, the activated carbon, the chitin and the binder are mixed and then are pressed to form a tertiary filter core;

[0030] The primary filter core, the secondary filter core and the tertiary filter core are loaded into a shell to obtain a mineralized filter core.

[0031] Optionally, in some embodiments of the present application, the step of modifying the calcareous mudstone to obtain the modified calcareous mudstone slurry comprises: after the calcareous mudstone is cleaned and dried by ultrasonic with deionized water, the calcareous mudstone is crushed into powder, the powder is dispersed in deionized water, then carbon dioxide is introduced, and continuous stirring is performed to obtain the modified calcareous mudstone slurry; and / or,

[0032] The step of modifying the anorthite to obtain the modified anorthite comprises: after the anorthite is treated by ultrasonic with dilute hydrochloric acid, the modified anorthite is obtained; and / or,

[0033] The step of modifying the sphalerite to obtain the modified sphalerite comprises: after the sphalerite is treated by ultrasonic with deionized water, the sphalerite is crushed into powder, the powder is calcined at 450-500 DEG C for 10-30 min, and then the modified sphalerite is obtained by cleaning and drying; and / or,

[0034] The step of modifying the analcime to obtain the modified analcime comprises: after the analcime is treated by ultrasonic with deionized water, the analcime is crushed into powder, the powder is calcined at 400-500 DEG C for 2-3 h, then the modified analcime is obtained by reacting at 55-65 DEG C for 4-6 h in the atmosphere of carbon dioxide and water vapor, and drying in the carbon dioxide atmosphere; and / or,

[0035] The step of modifying the sodium feldspar includes: crushing the sodium feldspar into powder, adding dilute sulfuric acid, stirring at 70-90 DEG C for 4-6h, then washing with deionized water until neutral, drying to obtain acid-modified sodium feldspar; mixing the acid-modified sodium feldspar and limestone, calcining at 600-750 DEG C for 1-1.5h to obtain a calcined product; mixing the calcined product, deionized water and sodium silicate, stirring in a water bath at 80-95 DEG C for 5-7h, centrifuging, drying to obtain modified sodium feldspar; and / or,

[0036] The pressing forming in the preparation of the secondary filter element and the tertiary filter element both include: sintering for 20-40min, then hydraulic treatment at 130-150 DEG C and 15-25MPa.

[0037] Optionally, in some embodiments of the present application, the concentration of the dilute sulfuric acid is 0.2-0.7mol / L, and the volume of the dilute sulfuric acid added per gram of the sodium feldspar is 1-2mL; and / or,

[0038] The particle size of the limestone is 100-200mesh.

[0039] In a third aspect, the present application further provides a water purifier, which comprises a mineralization filter element, and the mineralization filter element comprises the mineralization filter element described above, or the mineralization filter element is prepared by the preparation method described above.

[0040] The technical scheme provided by the present application sets the primary filter element, the secondary filter element and the tertiary filter element, when the water flow passes through the primary filter element, water-rock interaction occurs between the water flow and the calcareous cementation filter material, Ca 2+ and HCO3 - and a small amount of metasilicic acid are dissolved out, at the same time, water dissolved oxygen and modified sphalerite undergo water-rock interaction, Zn 2+ and SO4 2- are dissolved out, to a certain extent, the pH value of the effluent is improved; when the water flow passes through the secondary filter element, water-rock interaction occurs between the water flow and the modified analcime, SO4 2- in the water is adsorbed, and the content thereof is adjusted; when the water flow passes through the tertiary filter element, water-rock interaction occurs between the water flow and the modified sodium feldspar, part of the Zn 2+ in the water is exchanged and adsorbed, at the same time, metasilicic acid, HCO3 - and Na + are dissolved out; through the action of the three filter elements, the contents of sodium, magnesium, potassium, calcium, zinc and other metal ions, metasilicic acid, HCO3 - and SO4 2- in the water are improved, and the contents thereof are controlled within a suitable range, so that the taste of the drinking water is improved. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0042] Figure 1 is a structural schematic diagram of a mineralization filter element proposed in an embodiment of the present application;

[0043] Figure 2 is a flow schematic diagram of a preparation method of a mineralization filter element proposed in an embodiment of the present application;

[0044] Figure 3 is an SEM diagram of natural sodium feldspar before modification;

[0045] Figure 4 is an SEM diagram of modified sodium feldspar;

[0046] The drawings are as follows: 100-mineralization filter element; 10-housing; 11-inlet; 12-outlet; 20-primary filter element; 30-secondary filter element; 31-first gap; 40-tertiary filter element; 41-second gap; 50-PP cotton; 60-first spacer; 70-second spacer. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0048] In the present application, the orientation words such as "up" and "down" are specific to the drawing direction in the drawings unless otherwise stated. In addition, in the description of the present application, the term "comprising" means "including but not limited to".

[0049] Various embodiments of the present application can exist in a range of forms; it should be understood that the description in a range form is merely for the convenience and brevity, and should not be understood as a hard limitation on the scope of the present application; therefore, it should be considered that the range described has specifically disclosed all possible sub-ranges and single values within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. In addition, whenever a numerical range is indicated in this document, it refers to any cited number (fraction or integer) within the indicated range.

[0050] In the present application, the association relationship of the associated objects described by "and / or" indicates that there can be three kinds of relationships, for example, A and / or B can represent the cases of A existing alone, A and B existing together, and B existing alone. Wherein A and B can be singular or plural.

[0051] In the present application, "at least one" means one or more, and "multiple" means two or more. "At least one", "at least one of the following" or the like means any combination of these items, including any combination of single item or multiple items. For example, "at least one of a, b, or c", or "at least one of a, b, and c", can represent a, b, c, a-b (i.e. a and b), a-c, b-c, or a-b-c, wherein a, b, and c can be single or multiple.

[0052] The technical solution of the present application is implemented as follows:

[0053] In a first aspect, the present application provides a mineralization filter element 100, comprising a shell 10 and a primary filter element 20, a secondary filter element 30 and a tertiary filter element 40 filled in the shell 10, wherein: the primary filter element 20 comprises calcareous cement filter material and modified sphalerite, the calcareous cement filter material comprising modified calcareous mudstone slurry and modified anorthite; the secondary filter element 30 comprises an analcite composite material, the analcite composite material comprising modified analcite, activated carbon, chitin and a binder; and the tertiary filter element 40 comprises a sodium feldspar composite material, the sodium feldspar composite material comprising modified sodium feldspar, activated carbon, chitin and a binder.

[0054] The technical solution provided by the present application sets the primary filter element 20, the secondary filter element 30 and the tertiary filter element 40, when the water flow passes through the primary filter element 20, the water-rock interaction occurs with the calcareous cement filter material, Ca 2+ and HCO3 -and a small amount of metasilicic acid, at the same time, the dissolved oxygen in the water and the modified sphalerite undergo water-rock interaction, and dissolve out Zn 2+ and SO4 2- , and to a certain extent, increase the pH value of the effluent; when the water flows through the secondary filter core 30, it undergoes water-rock interaction with the modified alunite, and adsorbs SO4 2- in the water; when the water flows through the tertiary filter core 40, it undergoes water-rock interaction with the modified albite, and exchanges and adsorbs part of the Zn 2+ in the water, and at the same time, dissolves out metasilicic acid, HCO3 - and Na + ; through the action of the three filter cores, the contents of sodium, magnesium, potassium, calcium, zinc and other metal ions, as well as metasilicic acid, HCO3 - and SO4 2- in the water are increased, and their contents are controlled within a suitable range, thereby greatly improving the taste of the drinking water.

[0055] In some embodiments of the present application, the calcareous cement filter material includes 20-30 parts of modified calcareous mud slurry and 2-5 parts of modified anorthite, for example, the calcareous cement filter material can include 20 parts of modified calcareous mud slurry and 2 parts of modified anorthite, 22 parts of modified calcareous mud slurry and 3 parts of modified anorthite, 25 parts of modified calcareous mud slurry and 4 parts of modified anorthite, 28 parts of modified calcareous mud slurry and 5 parts of modified anorthite, 30 parts of modified calcareous mud slurry and 2.5 parts of modified anorthite, etc. The calcareous cement filter material can undergo water-rock interaction with water, and mainly dissolve out Ca 2+ and HCO3 - , and a small amount of metasilicic acid.

[0056] In some embodiments, the particle size of the calcareous cement filter material is 30-60 mesh, for example, 30 mesh, 40 mesh, 50 mesh, 60 mesh, and a value between any two of the above-mentioned values, within this range, the calcareous cement filter material can be in full contact with water, effectively play a role, and at the same time, ensure the clarity of the water quality.

[0057] In some embodiments, the modified calcareous mud slurry is a slurry obtained by acid modification of calcareous mud, after acid modification, at least part of the calcium carbonate contained in the calcareous mud is converted into water-soluble calcium bicarbonate, which helps to increase the dissolution of Ca 2+ and HCO3 - .

[0058] In some embodiments, the modified anorthite is an acid-modified anorthite. After acid modification, impurities in the surface and pores of the anorthite are removed, and the pore channels are dredged, which is beneficial to subsequent water-rock interaction. In some embodiments, the particle size of the modified anorthite is 200-300 mesh, for example, 200 mesh, 220 mesh, 250 mesh, 270 mesh, 300 mesh, and a value between any two of the above-listed values.

[0059] In some embodiments, the modified sphalerite is a calcined sphalerite, for example, a sphalerite calcined at 450-500°C. The modified sphalerite can undergo water-rock interaction with dissolved oxygen in water, thereby dissolving Zn 2+ and SO4 2- , to some extent, to increase the pH of the effluent. After high-temperature treatment, the Zn-S bond in the sphalerite crystal is broken, making it easier for Zn 2+ in the sphalerite to be dissolved out.

[0060] In some embodiments, the primary filter core 20 includes 20-30 parts of the calcareous cement filter material and 5-10 parts of the modified sphalerite.

[0061] In some embodiments, the analcite composite material includes 20-30 parts of modified analcite, 30-50 parts of activated carbon, 10-20 parts of chitin, and 15-25 parts of a binder; for example, the analcite composite material can include 20 parts of modified analcite, 30 parts of activated carbon, 10 parts of chitin, and 15 parts of a binder; 22 parts of modified analcite, 30 parts of activated carbon, 10 parts of chitin, and 20 parts of a binder; 25 parts of modified analcite, 35 parts of activated carbon, 12 parts of chitin, and 15 parts of a binder; 28 parts of modified analcite, 45 parts of activated carbon, 20 parts of chitin, and 25 parts of a binder; 30 parts of modified analcite, 50 parts of activated carbon, 15 parts of chitin, and 18 parts of a binder; and the like. The modified analcite can undergo water-rock interaction with water, adsorb SO4 2- in the water, and dissolve sodium, magnesium, and HCO3 - .

[0062] In some embodiments, the modified analcite is an analcite that is first calcined and then treated with carbon dioxide and water vapor. After modification, the pores of the analcite become developed, and the specific surface area is greatly increased. In some embodiments, the total pore volume of the modified analcite is increased from 3.02x10 -2 cm 3 / g before modification to 7.2x10 -2 cm 3 / g, and the specific surface area is increased from 14.232 m 2 / g before modification to 29.115 m 2 / g, greatly improving the adsorption capacity of the analcite.

[0063] In some embodiments, the albite composite material includes 20-30 parts of modified albite, 30-50 parts of activated carbon, 10-20 parts of chitin, and 15-25 parts of binder. For example, the albite composite material can include 20 parts of modified albite, 30 parts of activated carbon, 12 parts of chitin, and 15 parts of binder; 23 parts of modified albite, 35 parts of activated carbon, 19 parts of chitin, and 17 parts of binder; 25 parts of modified albite, 40 parts of activated carbon, 15 parts of chitin, and 20 parts of binder; 27 parts of modified albite, 50 parts of activated carbon, 20 parts of chitin, and 22 parts of binder; 30 parts of modified albite, 45 parts of activated carbon, 10 parts of chitin, and 25 parts of binder; and the like. The albite can undergo water-rock interaction with water to exchange and adsorb part of Zn 2+ , HCO3 - , and Na + .

[0064] In some embodiments, the raw materials of the modified albite include acid-modified albite, limestone, deionized water, and sodium silicate, and the weight ratio of the acid-modified albite, limestone, deionized water, and sodium silicate is 10:(2-5):(40-100):(1-3); for example, the ratio can be 10:2:40:1, 10:3:50:1, 10:4:60:1.5, 10:5:70:2, 10:2:80:2.5, 10:4:90:2.2, 10:5:100:3, 10:3:70:2, and the like. After modification, the ion exchange capacity and adsorption capacity of the albite are significantly improved, and the albite can better adsorb Zn 2+ and dissolve metasilicic acid. In the experimental detection of some embodiments, electron microscopy observation of the albite before and after modification shows that, compared with the albite before modification, Figure 3 and Figure 4 , the modified albite obtained after modification has more obvious pore structure, indicating that the ion exchange capacity of the albite is significantly improved after modification. Figure 4

[0065] ​It can be understood that, when assembling the mineralization filter element, the first-stage filter element, the second-stage filter element and the third-stage filter element are respectively prepared according to the unified standard of the number of parts, and then combined to form the mineralization filter element. For example, in some embodiments, the first-stage filter element comprises 20-35 parts of the calcareous cement filter material and 5-10 parts of the modified sphalerite, and each part of the calcareous cement filter material comprises 20-30 parts of the modified calcareous mud magma liquid and 2-5 parts of the modified anorthite; the second-stage filter element comprises 1 part of the anorthite composite material, and each part of the anorthite composite material comprises 20-30 parts of the modified anorthite, 30-50 parts of the activated carbon, 10-20 parts of the chitin and 15-25 parts of the binder; and the third-stage filter element comprises 1 part of the sodium feldspar composite material, and each part of the sodium feldspar composite material comprises 20-30 parts of the modified sodium feldspar, 30-50 parts of the activated carbon, 10-20 parts of the chitin and 15-25 parts of the binder. Specifically, when actually prepared, the standard of the number of parts can be as follows: 20-30 g of the modified calcareous mud magma liquid and 2-5 g of the modified anorthite are weighed to form one part of the calcareous cement filter material, and then 20-35 g of the calcareous cement filter material and 5-10 g of the modified sphalerite are taken to form the first-stage filter element; at the same time, 20-30 g of the modified anorthite, 30-50 g of the activated carbon, 10-20 g of the chitin and 15-25 g of the binder are taken to form 1 part of the anorthite composite material, which is used as the second-stage filter element; at the same time, 20-30 g of the modified sodium feldspar, 30-50 g of the activated carbon, 10-20 g of the chitin and 15-25 g of the binder are taken to form 1 part of the sodium feldspar composite material, which is used as the third-stage filter element; finally, the first-stage filter element, the second-stage filter element and the third-stage filter element prepared above are directly assembled to form the mineralization filter element. By combining the components according to the specific number of parts to form the mineralization filter element, the mineralization filter element can well adjust the ion content in pure water, and control the ion content in the following ranges: Na 5-12 mg / L, K 0.5-1.0 mg / L, Ca 10-20 mg / L, Mg 1-2 mg / L, Zn 0.2-0.5 mg / L, HCO3 - 30-70 mg / L, SO4 2- 0.1-3 mg / L, metasilicic acid 1-5 mg / L; through research and comparison, when the ion content in the drinking water is controlled in the above ranges, the taste of the drinking water is better.

[0066] The shell 10 has a water inlet 11 and a water outlet 12, and the first-stage filter element 20, the second-stage filter element 30 and the third-stage filter element 40 are sequentially arranged along the water flow direction from the water inlet 11 to the water outlet 12. Please refer to Figure 1In some embodiments, the shell 10 is a cylinder with a cavity formed therein, both ends of the shell 10 are provided with end covers, one of the end covers is provided with a water inlet 11, and the other end cover is provided with a water outlet 12. In the embodiment shown in the drawings, the first filter element 20, the second filter element 30, and the third filter element 40 are sequentially arranged in the shell 10 along the length direction of the shell 10. In operation, water flows into the shell 10 from the water inlet 11, sequentially passes through the first filter element 20, the second filter element 30, and the third filter element 40, and then flows out of the water outlet 12. It should be understood that, in this document, the water flow direction refers to the direction of water flow through the mineralization filter element 100 when the mineralization filter element 100 is installed in a water purifier.

[0067] In addition, the mineralization filter element 100 further comprises PP cotton 50 arranged between the first filter element 20 and the second filter element 30. The PP cotton 50 has strong pollution absorption capacity and can effectively remove various particulate impurities in the filtered liquid to effectively purify the water body.

[0068] In some embodiments of the present application, the second filter element 30 is a first cylinder with both ends open, a first inner cavity is defined in the first cylinder, and an annular first gap 31 is formed between the outer periphery of the first cylinder and the shell 10. The third filter element 40 is a second cylinder with both ends open, a second inner cavity is defined in the second cylinder, the second inner cavity is arranged opposite to the water outlet 12, one end of the first cylinder and the second cylinder is arranged corresponding to the open end, and an annular second gap 41 is formed between the outer periphery of the second cylinder and the shell 10. In this embodiment, the mineralization filter element 100 further comprises a first spacer and a second spacer. The first spacer is arranged between the first filter element 20 and the second filter element 30, and the second spacer is arranged between the second filter element 30 and the third filter element 40. The first spacer has a central region corresponding to the opening of the first cylinder, and the central region is provided with a first through hole. The number of the first through hole can be one, two, or more than two. The second spacer has an annular region corresponding to the first gap 31, and the annular region is provided with a second through hole. The number of the second through hole can be one, two, or more than two. Water flows into the shell 10 from the water inlet 11, is filtered by the first filter element 20 first, then enters the first inner cavity through the first through hole in the center of the first spacer 60, is filtered by the side wall of the first cylinder, enters the first gap 31, then enters the second gap 41 through the second through hole on the second spacer 70, is filtered by the side wall of the second cylinder, enters the second inner cavity, and finally flows out of the water outlet 12.

[0069] In a second aspect, the present application further provides a preparation method of the mineralization filter element 100. Please refer to Figure 2 The preparation method comprises the following steps:

[0070] S10, modifying calcilutite, calcic feldspar, sphalerite, analcime and albite respectively to obtain modified calcilutite slurry, modified calcic feldspar, modified sphalerite, modified analcime and modified albite;

[0071] S20, mixing the modified calcilutite slurry and the modified calcic feldspar and dehydrating, and crushing after being cemented into blocks to obtain calcilutite cemented filter material;

[0072] S30, mixing the calcilutite cemented filter material and the modified sphalerite to obtain a primary filter core 20;

[0073] S40, mixing the modified analcime, activated carbon, chitin and binder, and then pressing to form a secondary filter core 30;

[0074] S50, mixing the modified albite, activated carbon, chitin and binder, and then pressing to form a tertiary filter core 40;

[0075] S60, loading the primary filter core 20, the secondary filter core 30 and the tertiary filter core 40 into a shell 10 to obtain a mineralized filter core 100.

[0076] In some embodiments, the step of modifying calcilutite to obtain modified calcilutite slurry includes: after the calcilutite is cleaned and dried with deionized water by ultrasonic, the calcilutite is crushed into powder, the powder is dispersed in deionized water, then carbon dioxide is introduced, and continuous stirring is performed to obtain modified calcilutite slurry. In some embodiments, after the crushing operation, the particle size of the powder can be 200-300 mesh, that is, the powder can pass through a 200-300 mesh screen, and the screen can be a screen that meets the national standard GB / T6003.1-1997; in addition, in the step of dispersing the powder in deionized water, the weight of deionized water can be 4-6 times the weight of the powder; the time for introducing carbon dioxide can be 1-1.5h.

[0077] In some embodiments, the step of modifying calcic feldspar to obtain modified calcic feldspar includes: after the calcic feldspar is treated with dilute hydrochloric acid by ultrasonic, the modified calcic feldspar is obtained. In some embodiments, after the crushing operation, the particle size of the powder can be 200-300 mesh.

[0078] It can be understood that after the calcic feldspar is treated with dilute hydrochloric acid, it can also include: washing with deionized water and then drying.

[0079] In some embodiments, the step of modifying sphalerite to obtain modified sphalerite comprises: after ultrasonic treatment of sphalerite with deionized water, crushing the sphalerite into powder, calcining the powder at 450-500°C for 10-30 min, then washing with deoxygenated deionized water, and drying to obtain modified sphalerite. The particle size of the powder can be 60-80 mesh, for example, 60 mesh, 65 mesh, 70 mesh, 75 mesh, 80 mesh, and a value between any two of the above listed values. The calcination temperature can be 450°C, 460°C, 470°C, 480°C, 490°C, 500°C, and a value between any two of the above listed values. The calcination time can be 10 min, 15 min, 20 min, 25 min, 30 min, and a value between any two of the above listed values. In addition, in some embodiments, the drying temperature is less than or equal to 250°C, for example, 100°C, 120°C, 150°C, 180°C, 200°C, 230°C, 250°C, and the like.

[0080] In some embodiments, the step of modifying analcime to obtain modified analcime comprises: after ultrasonic treatment of analcime with deionized water, crushing the analcime into powder, calcining the powder at 400-500°C for 2-3 h, then reacting in a carbon dioxide and water vapor atmosphere at 55-65°C for 4-6 h, and drying in a carbon dioxide atmosphere to obtain modified analcime. The particle size of the powder can be 35-100 mesh, for example, 35 mesh, 40 mesh, 50 mesh, 60 mesh, 65 mesh, 70 mesh, 75 mesh, 80 mesh, 85 mesh, 90 mesh, 95 mesh, 100 mesh, and a value between any two of the above listed values. The calcination temperature can be 400°C, 420°C, 440°C, 450°C, 460°C, 470°C, 480°C, 490°C, 500°C, and a value between any two of the above listed values. The calcination time can be 2 h, 2.2 h, 2.5 h, 2.7 h, 3 h, and a value between any two of the above listed values. The reaction temperature can be 55°C, 57°C, 58°C, 60°C, 62°C, 64°C, 65°C, and a value between any two of the above listed values. The reaction time can be 4 h, 4.5 h, 5 h, 5.5 h, 6 h, and a value between any two of the above listed values. In addition, in some embodiments, the ratio of carbon dioxide to water vapor is (2-3):1, and the drying temperature is 80-100°C.

[0081] In some embodiments, the step of modifying the albite to obtain the modified albite includes: crushing the albite into a powder, adding dilute sulfuric acid, stirring at 70-90°C for 4-6h, then washing with deionized water until neutral, drying to obtain acid-modified albite; mixing the acid-modified albite and limestone, calcining at 600-750°C for 1-1.5h to obtain a calcined product; mixing the calcined product, deionized water and sodium silicate, stirring at 80-95°C under water bath conditions for 5-7h, centrifuging, drying to obtain the modified albite. The particle size of the powder can be 80-100 mesh, for example, 80 mesh, 85 mesh, 90 mesh, 95 mesh, 100 mesh and a value between any two of the above listed values; the stirring temperature can be 70°C, 75°C, 80°C, 85°C, 90°C and a value between any two of the above listed values; the stirring time can be 4h, 4.5h, 5h, 5.5h, 6h and a value between any two of the above listed values; the calcination temperature can be 600°C, 650°C, 700°C, 750°C and a value between any two of the above listed values; the calcination time can be 1h, 1.1h, 1.3h, 1.5h and a value between any two of the above listed values; the water bath temperature can be 80°C, 85°C, 90°C, 95°C and a value between any two of the above listed values; the stirring time can be 5h, 5.5h, 6h, 6.5h, 7h and a value between any two of the above listed values; the weight ratio of the acid-modified albite, limestone, deionized water and sodium silicate is 10:(2-5):(40-100):(1-3). In addition, in some embodiments, the step of drying to obtain the modified albite can be carried out under a nitrogen atmosphere.

[0082] In addition, the concentration of the dilute sulfuric acid is 0.2-0.7mol / L, for example, 0.2mol / L, 0.3mol / L, 0.4mol / L, 0.5mol / L, 0.6mol / L, 0.7mol / L, etc., and the volume of the dilute sulfuric acid added per gram of the albite is 1-2mL; the particle size of the limestone is 100-200 mesh.

[0083] In some embodiments, in step S20, the mixing weight ratio of the modified calcareous mudstone slurry and the modified anorthite can be 20-30:2-5; the particle size of the calcareous cemented filter material obtained after crushing is 30-60 mesh.

[0084] In some embodiments, in step S30, the weight ratio of the calcareous cemented filter material and the modified sphalerite can be 20-35:5-10; further, the weight ratio is preferably 2-7:1.

[0085] In some embodiments, in step S40, the weight ratio of the modified aluminosilicate, activated carbon, chitin and binder is 20-30:30-50:10-20:15-25; the step of compression molding specifically comprises: first placing the mixed material into a hydraulic mold and sintering for 20-40 min, then performing hydraulic treatment under the conditions of a hydraulic temperature of 130-150℃ and a hydraulic pressure of 15-25 MPa, and after cooling, a secondary filter element 30 is obtained.

[0086] In some embodiments, in step S50, the weight ratio of the modified albite, activated carbon, chitin and binder is 20-30:30-50:10-20:15-25; the step of compression molding specifically comprises: first placing the mixed material into a hydraulic mold and sintering for 20-40 min, then performing hydraulic treatment under the conditions of a hydraulic temperature of 130-150℃ and a hydraulic pressure of 15-25 MPa, and after cooling, a secondary filter element 30 is obtained.

[0087] In a third aspect, the present application further provides a water purifier, comprising a mineralization filter element 100, wherein the mineralization filter element 100 comprises the mineralization filter element 100 described above, or the mineralization filter element 100 is prepared by the preparation method described above.

[0088] When water contains specific types and concentrations of cations (for example, sodium, potassium, calcium, magnesium, etc.), it will have a salty, bitter, and sour taste; at the same time, certain concentrations and types of anions can modify the salty taste, and some ions may exhibit bitter or salty sweet taste inhibitors at high concentrations, and may be sweeteners at low concentrations. The water purifier provided by the present application is installed with the above mineralization filter element 100, which adjusts the content of anions and cations in the drinking water filtered by the reverse osmosis membrane, specifically, the drinking water filtered by the mineralization filter element 100 contains certain concentrations of metal ions such as sodium, magnesium, potassium, calcium, zinc and metasilicic acid, HCO3 - and SO4 2- , thereby improving the taste of drinking water.

[0089] The technical solutions and technical effects of the present application will be described in detail below through specific examples and comparative examples, and the following examples are only part of the examples of the present application, and do not specifically limit the present application.

[0090] Example 1

[0091] S1, preparation of calcium argillaceous magma solution: 30g of calcium argillaceous rock was washed and dried with ultrasonic deionized water, then treated into a 300 mesh powder, then put into 150g of deionized water, then continuously bubbled CO2 and continuously stirred, to obtain a modified calcium argillaceous magma solution.

[0092] S2, modification of calcite: 10 g of calcite was treated with dilute hydrochloric acid by ultrasonic treatment, and then treated into a powder with a particle size of 300 mesh to obtain modified calcite.

[0093] S3, modification of sphalerite: 20 g of sphalerite was treated with deionized water by ultrasonic treatment, and then treated into a powder with a particle size of 80 mesh. Then, the powder was calcined at 480°C for 15 min, washed with deoxygenated deionized water, and then filtered. Then, the powder was dried at a temperature of 120°C to obtain modified sphalerite.

[0094] S4, modification of analcime: 50 g of analcime was treated with deionized water by ultrasonic treatment, and then treated into a powder with a particle size of 80 mesh. Then, the powder was calcined at 450°C for 2 h, and then placed in a tube furnace. Carbon dioxide and water vapor (ratio of 2:1) were introduced, and the reaction was carried out at 60°C for 4 h. Then, the powder was dried at 100°C in a carbon dioxide atmosphere to obtain modified analcime.

[0095] S5, modification of albite: 20 g of albite was treated into a powder with a particle size of 100 mesh, and then 30 mL of 0.5 mol / L dilute sulfuric acid solution was added. The mixture was stirred at 80°C for 5 h, and then washed with deionized water until the pH was neutral. The mixture was then dried in a drying device to obtain acid-treated albite powder. 4 g of limestone powder with a particle size of 120 mesh and 20 g of acid-treated albite powder were mixed uniformly, and then calcined at 700°C for 1 h. After cooling, 100 g of deionized water and 4 g of sodium silicate were added. The mixture was stirred in a water bath at 90°C for 6 h. After the reaction was completed, the mixture was centrifuged and filtered, and then dried in a nitrogen atmosphere to obtain modified albite.

[0096] S6, preparation of primary filter core: 150 g of modified calcareous mud slurry and 10 g of modified calcite were mixed and stirred, and then dehydrated by extrusion. After the mixture was dried and broken into a powder with a particle size of 50 mesh, a calcareous cemented filter material was obtained. Then, 10 g of modified sphalerite and 25 g of the calcareous cemented filter material were mixed to prepare a primary filter core.

[0097] S7, preparation of secondary filter core: 20 g of modified analcime, 40 g of activated carbon, 15 g of chitin, and 20 g of binder were mixed and placed in a hydraulic mold for sintering for 30 min. Then, the mixture was pressed under the conditions of a hydraulic temperature of 140°C and a pressure of 20 Mpa, and then cooled to obtain a hollow cylindrical secondary filter core.

[0098] S8, preparation of tertiary filter core: 20 g of modified albite, 40 g of activated carbon, 15 g of chitin, and 20 g of binder were mixed and placed in a hydraulic mold for sintering for 30 min. Then, the mixture was pressed under the conditions of a hydraulic temperature of 140°C and a pressure of 20 Mpa, and then cooled to obtain a hollow cylindrical tertiary filter core.

[0099] S9, mineralization filter assembly: along the direction from the water inlet to the water outlet, the prepared primary filter, PP cotton, first spacer, secondary filter, second spacer and tertiary filter are sequentially installed in the shell to obtain a mineralization filter.

[0100] Example 2

[0101] S1, preparation of calcareous mud slurry: after the 30 g of calcareous mud is ultrasonically cleaned and dried with deionized water, it is treated into a 250 mesh powder, then it is put into 150 g of deionized water, then CO2 is continuously introduced, and continuous stirring is performed, to obtain a modified calcareous mud slurry.

[0102] S2, modification treatment of calcium feldspar: 10 g of calcium feldspar is ultrasonically treated with dilute hydrochloric acid, then it is treated into a 200 mesh powder to obtain modified calcium feldspar.

[0103] S3, modification treatment of sphalerite: 20 g of sphalerite is ultrasonically treated with deionized water, then it is treated into a 60 mesh powder, then it is calcined at 450°C for 30 min, then the powder is washed with deoxygenated deionized water and filtered, then it is dried at a temperature of 120°C to obtain modified sphalerite.

[0104] S4, modification treatment of analcime: 50 g of analcime is ultrasonically treated with deionized water, then it is treated into a 100 mesh powder, then it is calcined at 400°C for 2.5 h, then it is put into a tube furnace, carbon dioxide and water vapor (ratio of 2:1) are introduced, and reaction is performed at 55°C for 5 h, then it is dried at 100°C under a carbon dioxide atmosphere to obtain modified analcime.

[0105] S5, modification treatment of sodium feldspar: 20 g of sodium feldspar is treated into a 80 mesh powder, 20 mL of 0.5 mol / L dilute sulfuric acid solution is added, stirring is performed at 80°C for 5 h, then it is washed with deionized water until the pH is neutral, and then it is dried in a drying device to obtain acid-treated sodium feldspar powder. 6 g of limestone powder with a particle size of 100 mesh and 20 g of acid-treated sodium feldspar powder are uniformly mixed, then they are calcined at 600°C for 1.5 h, after cooling, 80 g of deionized water and 2 g of sodium silicate are added, then stirring is performed at 90°C in a water bath for 6 h. After the reaction is sufficiently completed, the mixture is centrifuged and filtered, and dried under a nitrogen atmosphere to obtain modified sodium feldspar.

[0106] S6, preparation of primary filter: 300 g of modified calcareous mud slurry and 50 g of modified calcium feldspar are taken, they are thoroughly mixed and stirred, then they are extruded and dewatered, after being cemented into a block, drying is performed, then the block is broken into a 30 mesh powder to obtain calcareous cemented filter material. Then 5 g of modified sphalerite and 35 g of calcareous cemented filter material are mixed to prepare a primary filter.

[0107] S7, secondary filter element manufacturing: take 30 g of modified analcite, 50 g of activated carbon, 20 g of chitin and 25 g of binder, mix them thoroughly, put them into a hydraulic mold and sinter for 30 min, then press under the condition of a hydraulic temperature of 140 ℃ and a pressure of 20 Mpa, and cool, to obtain a hollow cylindrical structure of the secondary filter element.

[0108] S8, tertiary filter element manufacturing: take 30 g of modified sodium feldspar, 50 g of activated carbon, 20 g of chitin and 25 g of binder, mix them thoroughly, put them into a hydraulic mold and sinter for 30 min, then press under the condition of a hydraulic temperature of 140 ℃ and a pressure of 20 Mpa, and cool, to obtain a hollow cylindrical structure of the tertiary filter element.

[0109] S9, mineralization filter element assembly: install the primary filter element, PP cotton, first spacer, secondary filter element, second spacer and tertiary filter element in the shell in the direction from the water inlet to the water outlet, to obtain a mineralization filter element.

[0110] Example 3

[0111] S1, preparation of calcareous mud slurry: after the 30 g of calcareous mud is ultrasonically cleaned and dried with deionized water, it is processed into a 200-mesh powder, then it is put into 150 g of deionized water, then CO2 is continuously introduced, and the mixture is continuously stirred, to obtain a modified calcareous mud slurry.

[0112] S2, modification of calcium feldspar: after 10 g of calcium feldspar is ultrasonically treated with dilute hydrochloric acid, it is processed into a 280-mesh powder, to obtain modified calcium feldspar.

[0113] S3, modification of sphalerite: after 20 g of sphalerite is ultrasonically treated with deionized water, it is processed into a 70-mesh powder, then it is calcined at 500 ℃ for 10 min, then the powder is washed with deoxygenated deionized water and filtered, then it is dried at 120 ℃, to obtain modified sphalerite.

[0114] S4, modification of analcite: after 50 g of analcite is ultrasonically treated with deionized water, it is processed into a 35-mesh powder, then it is calcined at 500 ℃ for 3 h, then it is put into a tube furnace, carbon dioxide and water vapor (ratio of 2:1) are introduced, and the mixture is reacted at 65 ℃ for 6 h, then it is dried at 100 ℃ under a carbon dioxide atmosphere, to obtain modified analcite.

[0115] S5, Na-feldspar modification treatment: 20 g of Na-feldspar was treated into 100 mesh powder, 40 mL of 0.5 mol / L dilute sulfuric acid solution was added, stirred at 80°C for 5 h, then washed with deionized water until pH neutral, and dried in a drying device to obtain acid-treated Na-feldspar powder. 10 g of limestone powder with a particle size of 200 mesh and 20 g of acid-treated Na-feldspar powder were mixed uniformly, then calcined at 750°C for 1.1 h, 200 g of deionized water and 6 g of sodium silicate were added after cooling, then stirred in a water bath at 90°C for 6 h. After the reaction was completed, the mixture was centrifuged and filtered, and dried under a nitrogen atmosphere to obtain modified Na-feldspar.

[0116] S6, primary filter element preparation: 250 g of modified calcareous mud slurry and 50 g of modified anorthite were mixed and stirred, then dehydrated by extrusion, dried after agglomeration, and then crushed into 60 mesh powder to obtain calcareous cement filter material. Then 5 g of modified sphalerite and 30 g of calcareous cement filter material were mixed to prepare a primary filter element.

[0117] S7, secondary filter element preparation: 25 g of modified analcite, 30 g of activated carbon, 10 g of chitin, and 15 g of binder were mixed and placed in a hydraulic mold for sintering for 30 min, then pressed under the conditions of a hydraulic temperature of 140°C and a pressure of 20 Mpa, and cooled to obtain a hollow cylindrical structure of the secondary filter element.

[0118] S8, tertiary filter element preparation: 25 g of modified Na-feldspar, 30 g of activated carbon, 10 g of chitin, and 15 g of binder were mixed and placed in a hydraulic mold for sintering for 30 min, then pressed under the conditions of a hydraulic temperature of 140°C and a pressure of 20 Mpa, and cooled to obtain a hollow cylindrical structure of the tertiary filter element.

[0119] S9, mineralization filter element assembly: the primary filter element, PP cotton, first spacer, secondary filter element, second spacer, and tertiary filter element prepared were sequentially installed in the shell from the water inlet to the water outlet to obtain a mineralization filter element.

[0120] Comparative Example 1

[0121] This comparative example is basically the same as Example 1, the only difference being that in this comparative example:

[0122] In step S6, the composition of the primary filter element was changed from “10 g of modified sphalerite and 25 g of calcareous cement filter material” to “5 g of modified sphalerite and 5 g of calcareous cement filter material”. The other steps and parameters were unchanged.

[0123] Comparative Example 2

[0124] This comparative example is basically the same as Example 1, the only difference being that in this comparative example:

[0125] In step S6, the composition of the primary filter element is changed from "10 g modified sphalerite and 25 g calcareous cement filter material" to "20 g modified sphalerite and 50 g calcareous cement filter material". The other steps and parameters remain unchanged.

[0126] Comparative Example 3

[0127] This comparative example is basically the same as Example 1, except that in the comparative example:

[0128] In step S8, the modified sodium feldspar is changed to sodium feldspar.

[0129] (I) Functional water passing tests were performed on the mineralized filter elements of Examples 1-3 and Comparative Examples 1-3.

[0130] The test method was as follows: the mineralized filter element of Example 1 was taken, and its water inlet was installed on the water outlet of a reverse osmosis membrane filter (RO) water purifier. After passing water at a flow rate of 2.0 ± 0.1 L / min for 30 min, the pH, sodium, magnesium, potassium, calcium, zinc, HCO3 - , SO4 2- and metasilicic acid contents of the primary outlet water filtered by the primary filter element, the secondary outlet water filtered by the primary and secondary filter elements, the tertiary outlet water flowing out of the mineralized filter element outlet, and the pure water not filtered by the mineralized filter element in the water purifier were tested.

[0131] Referring to the above test method, functional water passing tests were performed on the mineralized filter elements of Examples 2 and 3 and Comparative Examples 1-3, and the tertiary outlet water filtered by the mineralized filter elements of the examples was tested.

[0132] The results are recorded in Table 1.

[0133] Table 1

[0134]

[0135] Note: "ND" means not detected.

[0136] As can be seen from Table 1, compared with pure water, the pH of the tertiary outlet water of each example is 8.18-8.5, and the contents of sodium, magnesium, potassium, calcium, zinc, HCO3 - , SO4 2- and metasilicic acid are all increased, indicating that the mineralized filter element proposed in the application can adjust the mineral content in RO pure water, increase the content of anions and cations that can affect the taste of drinking water, and control them within a certain range: Na 5-12 mg / L, Ca 10-20 mg / L, Mg 1-2 mg / L, K 0.5-1 mg / L, Zn 0.2-0.5 mg / L, HCO3 - 30-70 mg / L, SO4 2-0.1~3 mg / L, metasilicic acid 1~5 mg / L.

[0137] Furthermore, comparing the pure water with the first-stage, second-stage, and third-stage effluents of Example 1, it can be seen that after the water flows through the first-stage filter, the pH value increases, and the levels of sodium, magnesium, potassium, calcium, zinc, and HCO3 decrease. - SO4 2- The content of metasilicic acid and calcium, especially SO4, has increased. 2- and HCO3 - After passing through the secondary filter cartridge, SO4 is adsorbed due to the water-rock interaction of the modified analcime. 2- This significantly reduced its content, while the content of other ions increased or decreased to some extent; after passing through the three-stage filter, the zinc content decreased, while the HCO3 content also decreased. - SO4 2- The content of metasilicic acid has also been increased, thus ensuring that the content of each ion in the tertiary effluent is controlled within an appropriate range.

[0138] Furthermore, comparing the tertiary effluent from Example 1 with that from Comparative Examples 1 and 2, it can be seen that the increase in the content of each ion in Comparative Example 1 is low, and the pH value is less than 7, while in Comparative Example 2, not only is the pH too high, but zinc, calcium, and SO4 are also present. 2- and HCO3 - The levels were too high, with pH and zinc ion content even exceeding the standards for drinking water, failing to meet drinking requirements.

[0139] (II) Taste Evaluation

[0140] The testing method is as follows: Take the mineralized filter element of Example 1, install its inlet on the outlet of the reverse osmosis (RO) water purifier, and after passing different volumes of water (60L, 500L, 2500L, 3600L), take the three-stage water flowing out of the mineralized filter element outlet and the pure water in the water purifier that has not been filtered by the mineralized filter element for taste evaluation.

[0141] Referring to the above water sampling and evaluation methods, the tertiary effluent from the mineralized filter cartridges of Examples 2 and 3 and Comparative Examples 1 and 3 after passing 500L of water was evaluated.

[0142] Evaluation method: 40ml of water was poured into a disposable cup, 5 test subjects aged 20-40 years were selected, who could not smoke, drink, and could not have rhinitis. Before the experiment, the test subjects needed to rinse their mouths with pure water, and before tasting each water sample, they first tasted the pure water, and all water samples were compared with the pure water. The test subjects first held the water in their mouths for about 5s (initial taste), then swallowed, and the aftertaste was delayed for 10s (aftertaste). After tasting each water sample, the next water sample was tasted after 1min. The water temperature and room temperature were both 25℃, and the initial taste, softness, metallic taste, bitterness, sweetness, aftertaste and overall impression indicators were evaluated for each water sample. Each indicator was scored as +2, +1, +0.5, 0, -0.5, -1, -2, representing very good, better, better, average, worse, worse, very bad.

[0143] Calculation: The average score of each indicator was calculated respectively.

[0144] The results are recorded in Table 2.

[0145] Table 2

[0146]

[0147] From Table 2, it can be found that compared with the taste of the water after RO reverse osmosis filtration and the water of Comparative Examples 1 and 3, the taste of the water after passing through the mineralization filter of each example has been greatly improved, and the taste improvement effect is obvious.

[0148] The mineralization filter provided by the embodiments of the present application, the preparation method thereof and the water purifier are described in detail above, and specific examples are applied to explain the principles and implementation modes of the present application. The above example is only used to help understand the method and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as a limitation of the present application.

Claims

1. A mineralized filter cartridge, characterized in that, The mineralization filter core comprises a shell and a primary filter core, a secondary filter core and a tertiary filter core filled in the shell, wherein: The primary filter core comprises calcareous cement filter material and modified sphalerite, the calcareous cement filter material comprises modified calcareous mud slurry and modified anorthite; The secondary filter core comprises an analcite composite material, the analcite composite material comprises modified analcite, activated carbon, chitin and a binder; The tertiary filter core comprises a sodium feldspar composite material, the sodium feldspar composite material comprises modified sodium feldspar, activated carbon, chitin and a binder; The shell has a water inlet and a water outlet, the primary filter core, the secondary filter core and the tertiary filter core are sequentially arranged along the water flow direction from the water inlet to the water outlet; The modification step of the modified calcareous mud slurry comprises: after the calcareous mud is cleaned and dried by ultrasonic deionized water, the calcareous mud is crushed into powder, the powder is dispersed in deionized water, then carbon dioxide is introduced, and continuous stirring is carried out to obtain the modified calcareous mud slurry; The modified anorthite is acid-modified anorthite; The sphalerite is calcined modified sphalerite; The modified analcite is analcite which is first calcined and then treated by carbon dioxide and water vapor; The modification step of the modified sodium feldspar comprises: sodium feldspar is crushed into powder, dilute sulfuric acid is added, stirring is carried out at 70-90℃ for 4-6h, then the acid-modified sodium feldspar is washed with deionized water until it is neutral, and is dried to obtain the acid-modified sodium feldspar; the acid-modified sodium feldspar and limestone are mixed, calcination is carried out at 600-750℃ for 1-1.5h to obtain a calcination product; the calcination product, deionized water and sodium silicate are mixed, stirring is carried out in a water bath at 80-95℃ for 5-7h, and centrifugation and drying are carried out to obtain the modified sodium feldspar, and the weight ratio of the acid-modified sodium feldspar, limestone, deionized water and sodium silicate is 10:(2-5):(40-100):(1-3).

2. The mineralized filter cartridge of claim 1, wherein, The primary filter core comprises 20-35 parts of the calcareous cement filter material and 5-10 parts of the modified sphalerite; and / or, The calcareous cement filter material comprises 20-30 parts of the modified calcareous mud slurry and 2-5 parts of the modified anorthite; and / or, The analcite composite material comprises 20-30 parts of the modified analcite, 30-50 parts of activated carbon, 10-20 parts of chitin and 15-25 parts of a binder; and / or, The sodium feldspar composite material comprises 20-30 parts of the modified sodium feldspar, 30-50 parts of activated carbon, 10-20 parts of chitin and 15-25 parts of a binder.

3. The mineralized filter cartridge of claim 1, wherein, The particle size of the modified anorthite is 200-300 meshes; and / or, The particle size of the calcareous cement filter material is 30-60 meshes.

4. The mineralized filter cartridge of claim 1, wherein, The mineralization filter core further comprises PP cotton arranged between the primary filter core and the secondary filter core.

5. The mineralized filter cartridge of claim 4, wherein, The secondary filter core is a first cylinder with open ends, a first gap is formed between the outer circumferential side of the first cylinder and the shell, and the tertiary filter core is a second cylinder with open ends, a second gap is formed between the outer circumferential side of the second cylinder and the shell; The mineralized filter core further comprises a first partition sheet arranged between the first-stage filter core and the second-stage filter core, and a second partition sheet arranged between the second-stage filter core and the third-stage filter core, the first partition sheet is provided with a first through hole corresponding to the central region of the opening of the first cylinder body, and the second partition sheet is provided with a second through hole corresponding to the annular region of the first gap.

6. A method of making a mineralized filter cartridge, characterized by, The method comprises the following steps: The calcareous mudstone, calcic feldspar, sphalerite, analcime and albite are respectively modified to obtain modified calcareous mudstone slurry, modified calcic feldspar, modified sphalerite, modified analcime and modified albite; The modified calcareous mudstone slurry and the modified calcic feldspar are mixed and dehydrated, and after being cemented into blocks, the blocks are crushed to obtain calcareous cemented filter material; The calcareous cemented filter material and the modified sphalerite are mixed to obtain a first-stage filter core; The modified analcime, activated carbon, chitin and binder are mixed and then are pressed to form a second-stage filter core; The modified albite, activated carbon, chitin and binder are mixed and then are pressed to form a third-stage filter core; The first-stage filter core, the second-stage filter core and the third-stage filter core are arranged in a shell to obtain a mineralized filter core; The shell has a water inlet and a water outlet, and the first-stage filter core, the second-stage filter core and the third-stage filter core are arranged in sequence along the water flow direction from the water inlet to the water outlet; The modification step of the modified calcareous mudstone slurry comprises the following steps: the calcareous mudstone is cleaned and dried by ultrasonic treatment with deionized water, and then is crushed into powder, the powder is dispersed in deionized water, carbon dioxide is introduced, and continuous stirring is performed to obtain the modified calcareous mudstone slurry; The modified calcic feldspar is acid-modified calcic feldspar; The sphalerite is roasting-modified sphalerite; The modified analcime is analcime which is first calcined and then treated with carbon dioxide and water vapor; The modification step of the modified albite comprises the following steps: the albite is crushed into powder, dilute sulfuric acid is added, stirring is performed at 70-90 DEG C for 4-6 hours, then the albite is washed with deionized water until neutral, and is dried to obtain acid-modified albite; the acid-modified albite and limestone are mixed, and are calcined at 600-750 DEG C for 1-1.5 hours to obtain a calcined product; the calcined product, deionized water and sodium silicate are mixed, and stirring is performed in a water bath at 80-95 DEG C for 5-7 hours, and then centrifugation and drying are performed to obtain the modified albite, and the weight ratio of the acid-modified albite, limestone, deionized water and sodium silicate is 10: (2-5): (40-100): (1-3).

7. The preparation method according to claim 6, characterized in that, The modification step of the modified calcic feldspar comprises the following steps: the calcic feldspar is ultrasonically treated with dilute hydrochloric acid to obtain the modified calcic feldspar; and / or, The modification step of the modified sphalerite comprises the following steps: the sphalerite is ultrasonically treated with deionized water, and then is crushed into powder, the powder is calcined at 450-500 DEG C for 10-30 minutes, and then is cleaned and dried to obtain the modified sphalerite; and / or, The step of modifying the analcite includes: ultrasonic treating the analcite with deionized water, crushing the analcite into powder, calcining the powder at 400-500 ℃ for 2-3 h, then reacting the powder in a carbon dioxide and water vapor atmosphere at 55-65 ℃ for 4-6 h, and drying the powder in a carbon dioxide atmosphere to obtain the modified analcite; and / or, The pressing forming in the preparation of the secondary filter element and the tertiary filter element both include: sintering for 20-40 min, and then hydraulic treatment at 130-150 ℃ and 15-25 MPa.

8. The preparation method according to claim 7, characterized in that, The concentration of the dilute sulfuric acid is 0.2-0.7 mol / L, and the volume of the dilute sulfuric acid added per gram of the sodium feldspar is 1-2 mL; and / or, The particle size of the limestone is 100-200 mesh.

9. A water purifier characterized by comprising: The mineralization filter element comprises the mineralization filter element according to any one of claims 1 to 5, or is prepared by the preparation method according to any one of claims 6 to 8.

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