Strontium mineralized filter element and preparation method thereof, water purifier

Abstract

The application relates to a strontium mineralization filter element and a preparation method thereof and a water purifier. The strontium mineralization filter element comprises an inner layer and an outer layer arranged on the outer surface of the inner layer, the outer layer is used for being communicated with a water inlet, the inner layer is used for being communicated with a water outlet, the inner layer comprises silicate ore powder, and the outer layer comprises strontium ore powder; the mass ratio of the strontium ore powder to the silicate ore powder is 1-6:1. The strontium mineralization filter element can adjust the inhibition effect of silicate on the dissolution of strontium ions during the static state of the strontium mineralization filter element, so that the strontium ion concentration of the first cup of water after the strontium mineralization filter element is static can meet the safety upper limit requirement, and the strontium concentration of the produced water during the water passing period of the strontium mineralization filter element can meet the design lower limit requirement.

Description

TECHNICAL FIELD

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

[0002] With the continuous improvement of residents' health awareness, it has been proved that an appropriate amount of minerals in drinking water is of great significance to human health. Strontium ions, as a key beneficial mineral, can participate in human bone metabolism, promote calcium absorption, and have a positive effect on bone health. Under this background, water purifiers with mineralization function have gradually become one of the mainstream products in the water purification equipment market. At present, adding strontium ore in the filter element of the water purifier can release strontium ions into the water. However, this traditional design has a significant defect: when the water purifier stops running and is in a static state, the residual water in the filter element remains in contact with the strontium ore for a long time, causing continuous dissolution of strontium ions and unable to be discharged in time, resulting in continuous enrichment of strontium ions in the residual water. When the user starts the water purifier next time, the first cup of water is the enriched water, and the strontium ion concentration is easy to exceed the safety limit of drinking water, which poses a health risk.

[0003] Therefore, it is necessary to improve the traditional technology. SUMMARY

[0004] Based on this, the present application provides a strontium mineralized filter element, a preparation method thereof and a water purifier, which can effectively control the dissolution rate of strontium ions and ensure the safety of drinking water.

[0005] The technical solution of the present application to solve the above technical problems is as follows.

[0006] The first aspect of the present application provides a strontium mineralized filter element, comprising an inner layer and an outer layer arranged on the outer surface of the inner layer, the outer layer being used for communicating with a water inlet, the inner layer being used for communicating with a water outlet, the inner layer comprising silicate ore powder, and the outer layer comprising strontium ore powder; the mass ratio of the strontium ore powder to the silicate ore powder is 1-6:1.

[0007] In some embodiments, the mass ratio of the strontium ore powder to the silicate ore powder in the strontium mineralized filter element is 1-4:1.

[0008] In some embodiments, the particle size of the strontium ore powder in the strontium mineralized filter element is larger than that of the silicate ore powder.

[0009] In some embodiments, the strontium mineralized filter element satisfies at least one of the following characteristics:

[0010] (1) the particle size of the strontium ore powder is 18-60 mesh;

[0011] (2) the particle size of the silicate ore powder is 60-300 mesh.

[0012] In some embodiments, the strontium mineralized filter element, the inner layer has a ring-shaped cross section, and the outer layer is sleeved on the periphery of the inner layer.

[0013] In some embodiments, the strontium mineralized filter element, the strontium mineralized filter element satisfies at least one of the following characteristics:

[0014] (1) the strontium ore powder comprises at least one of celestite and strontium spar;

[0015] (2) the silicate ore powder comprises at least one of zeolite and wollastonite.

[0016] In some embodiments, the strontium mineralized filter element, the inner layer and the outer layer both further comprise activated carbon and glue powder, and the strontium mineralized filter element satisfies at least one of the following characteristics:

[0017] (1) the outer layer comprises, in terms of mass fraction, 10-25 parts of strontium ore powder, 80-120 parts of activated carbon, and 40-100 parts of glue powder;

[0018] (2) the inner layer comprises 2-20 parts of silicate ore powder, 80-120 parts of activated carbon, and 40-100 parts of glue powder.

[0019] The second aspect of the present application provides a preparation method of a strontium mineralized filter element, comprising the following steps:

[0020] Preparation of an inner layer and an outer layer arranged on the outer surface of the inner layer, the outer layer is used in communication with the water inlet, the inner layer is in communication with the water outlet, the inner layer comprises silicate ore powder, and the outer layer comprises strontium ore powder; the mass ratio of the strontium ore powder to the silicate ore powder is 1-6:1.

[0021] In some embodiments, the preparation method of the strontium mineralized filter element, comprising the following steps:

[0022] Mixing strontium ore powder, activated carbon and glue powder to prepare a strontium mineralized carbon rod;

[0023] Mixing silicate ore powder, activated carbon and glue powder to prepare a silicate mineralized carbon rod;

[0024] The strontium mineralized carbon rod and the silicate mineralized carbon rod are both hollow structures, and the outer diameter of the silicate mineralized carbon rod is less than or equal to the inner diameter of the strontium mineralized carbon rod;

[0025] The strontium mineralized carbon rod is sleeved on the outer side of the silicate mineralized carbon rod, the strontium mineralized carbon rod is used in communication with the water inlet, and the silicate mineralized carbon rod is in communication with the water outlet.

[0026] In some embodiments, the method for preparing the strontium mineralized filter element satisfies at least one of the following characteristics:

[0027] (1) The strontium ore powder is a modified strontium ore, and the preparation of the modified strontium ore comprises the following steps:

[0028] The strontium ore is sequentially subjected to thermal activation treatment and microwave irradiation treatment to prepare the modified strontium ore.

[0029] (2) The silicate ore powder is a modified silicate ore, and the preparation of the modified silicate ore comprises the following steps:

[0030] The silicate ore, quicklime and water are mixed for alkalization treatment, and then carbon dioxide is introduced for neutralization to prepare the modified silicate ore.

[0031] The third aspect of the present application provides a water purifier comprising the strontium mineralized filter element provided in the first aspect or the strontium mineralized filter element prepared by the method provided in the second aspect.

[0032] The strontium mineralized filter element of the present application comprises an inner layer and an outer layer arranged on the outer surface of the inner layer, the outer layer is used for communicating with the water inlet, and the inner layer is used for communicating with the water outlet. The inner layer comprises a silicate ore powder, and the outer layer comprises a strontium ore powder. During water flow through the filter element, the water flow first passes through the outer layer and then passes through the inner layer. The silicate ore powder in the inner layer has a shorter contact time with the real-time flowing water, a lower dissolved metasilicic acid concentration, and flows out after purification, which does not affect the dissolution of strontium ions from the strontium ore powder in the outer layer. During the standing period of the filter element, the dissolved metasilicic acid in the inner layer can penetrate into the outer layer to inhibit the dissolution of strontium ions in the strontium ore powder. As the standing time increases, the concentration of the dissolved metasilicic acid in the inner layer gradually increases, penetrates into the surface of the strontium ore powder in the outer layer to form a passivation layer, and enhances the inhibition effect on the dissolution of strontium ions. By controlling the mass ratio of the strontium ore powder to the silicate ore powder, the inhibition effect of the silicate on the dissolution of strontium ions during the standing period of the strontium mineralized filter element can be adjusted, so that the strontium ion concentration of the first cup of water after the strontium mineralized filter element is placed can meet the safety upper limit requirement, and the strontium concentration of the produced water during the water flow through the strontium mineralized filter element can meet the design lower limit requirement. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, more completely understand the present application and its beneficial effects, the following will briefly introduce the drawings needed to be used in the embodiment description. 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 creating any creative labor on the basis of these drawings.

[0034] Figure 1A structure diagram of a strontium mineralization filter element provided by an embodiment.

[0035] Reference signs:

[0036] 10: inner layer; 20: outer layer. DETAILED DESCRIPTION

[0037] The present application will be further described below in connection with embodiments and examples. It should be understood that these embodiments and examples are only used to explain the present application and not used to limit the scope of the present application, and the purpose of providing these embodiments and examples is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0038] It should also be understood that the present application can be realized in many different forms and is not limited to the embodiments and examples described herein, and those skilled in the art can make various modifications or changes without departing from the spirit of the present application, and the equivalent forms obtained thereby also fall within the protection scope of the present application. For example, the features described or illustrated as part of an embodiment can be combined in another embodiment in a suitable manner to produce a new embodiment. In addition, in the following description, a large number of specific details are given in order to provide a more complete understanding of the present application, and it should be understood that the present application can be implemented without one or more of these details.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing the embodiments and examples and are not intended to limit the present application.

[0040] Unless otherwise stated or contradictory, the terms or phrases used herein have the following meanings:

[0041] In the present application, "a plurality of", "a plurality of", "a plurality of" and the like are not specifically limited and refer to more than two or equal to two in number. For example, "one or more" means one or more than two.

[0042] As used herein, "combinations thereof", "any combination thereof", "any combination thereof" and the like include all suitable combinations of any two or more of the listed items.

[0043] In the present application, "suitable combinations", "suitable ways", "any suitable way" and the like are "suitable" as the implementation of the technical solutions of the present application, the solution of the technical problems of the present application, and the realization of the expected technical effects of the present application.

[0044] In the present application, “preferably”, “more preferably”, “even more preferably”, “suitably”, “more suitably”, “most suitably” are used to describe the better effect of the embodiments or examples, and should be understood as not limiting the scope of protection of the present application. If there are multiple “preferably” in a technical solution, and there is no contradictory or mutually restrictive relationship, each “preferably” is independent.

[0045] In the present application, “further”, “even further”, “in particular” and the like are used to describe the difference in content, but should not be understood as limiting the scope of protection of the present application.

[0046] In the present application, “optionally”, “optional” and “may” mean that it can or can not exist, that is, it means to select either of the two parallel schemes of “yes” or “no”. If there are multiple “optionally” in a technical solution, and there is no contradictory or mutually restrictive relationship, each “optionally” is independent.

[0047] In the present application, in the terms “first aspect”, “second aspect”, “third aspect”, “fourth aspect” and the like, the terms “first”, “second”, “third”, “fourth” and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or quantity, nor can it be understood as implying the importance or quantity of the indicated technical features. Moreover, “first”, “second”, “third”, “fourth” and the like only serve the purpose of non-exhaustive enumeration description, and should be understood as not constituting a closed limitation on the quantity.

[0048] In the present application, in the technical features described in an open manner, both the closed technical solution consisting of the listed features and the open technical solution containing the listed features are included.

[0049] In the present application, with respect to the numerical interval (i.e. numerical range), if not specifically stated, the distribution of the optional values in the numerical interval is considered to be continuous, and includes both numerical endpoints (i.e. the minimum value and the maximum value) of the numerical interval and every value between the two numerical endpoints. If not specifically stated, when the numerical interval only points to the integers in the numerical interval, including the two endpoint integers of the numerical range and every integer between the two endpoints, it is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe a feature or characteristic, these numerical ranges can be combined. In other words, unless otherwise indicated, the numerical range disclosed herein should be understood to include any and all sub-ranges encompassed therein. The “numerical value” in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. The “numerical interval” is allowed to broadly include numerical interval types such as percentage interval, ratio interval, ratio interval, etc.

[0050] The temperature parameters in the present application, unless otherwise specified, allow both constant temperature treatment and variation within a certain temperature range. It should be understood that the constant temperature treatment allows fluctuations within the accuracy range controlled by the instrument. Fluctuations within a range such as ± 5°C, ± 4°C, ± 3°C, ± 2°C, ± 1°C are allowed.

[0051] In the present application, the term "room temperature" or "ambient temperature" generally refers to 4°C ~ 35°C, for example 20°C ± 5°C. In some embodiments of the present application, "room temperature" or "ambient temperature" refers to 10°C ~ 30°C. In some embodiments of the present application, "room temperature" or "ambient temperature" refers to 20°C ~ 30°C.

[0052] In the present application, the units related to the data range, if only the right endpoint is followed by a unit, it means that the units of the left endpoint and the right endpoint are the same. For example, 3 ~ 5 h means that the units of the left endpoint "3" and the right endpoint "5" are both h (hours).

[0053] The mass or weight of the related components mentioned in the present application embodiment specification can not only refer to the specific content of each component, but also represent the proportional relationship between the mass or weight of each component. Therefore, as long as the content of the related components in the present application embodiment specification is enlarged or reduced in proportion, it is within the scope disclosed in the present application embodiment specification. Specifically, the mass or weight described in the present application embodiment specification can be μg, mg, g, kg and other units commonly known in the chemical industry.

[0054] The present application solves the problem of excessive strontium ion dissolution and excessive strontium ion concentration in the first cup of water in the static state of the traditional water purifier.

[0055] An embodiment of the present application provides a strontium mineralization filter element, which comprises an inner layer and an outer layer arranged on the outer surface of the inner layer. The outer layer is used for communication with a water inlet, and the inner layer is used for communication with a water outlet. The inner layer comprises silicate ore powder, and the outer layer comprises strontium ore powder. The mass ratio of the strontium ore powder to the silicate ore powder is 1 ~ 6: 1.

[0056] By adding strontium ore powder to the outer layer of the strontium mineralization filter element and adding silicate ore powder to the inner layer, the strontium ore powder is passivated by the metasilicic acid dissolved from the silicate ore powder, so that the strontium ions are normally released in the water passing state and the release is slowed down in the static state. The dissolution rate of strontium ions can be effectively controlled, the strontium ion concentration in the first cup of water is reduced, and the safety of drinking water is ensured.

[0057] In the water passing period of the filter core, the inner layer silicate ore powder is in contact with real-time flowing water for a short time, the dissolved metasilicic acid concentration is low, and it flows out after purification, which does not affect the dissolution of strontium ions in the outer layer strontium ore powder; in the filter core standing period, the dissolved metasilicic acid in the inner layer can penetrate into the outer layer to inhibit the dissolution of strontium ions in the strontium ore powder; and with the increase of the standing time, the concentration of the dissolved metasilicic acid in the inner layer gradually increases, penetrates to the surface of the outer layer strontium ore powder to form a passivation layer, and enhances the inhibition effect on the dissolution of strontium ions, thereby effectively reducing the concentration of strontium ions in the first cup of water after the filter core is standing, and ensuring the safety of drinking water.

[0058] By controlling the mass ratio of strontium ore powder and silicate ore powder in the strontium mineralization filter core, the inhibition effect of silicate on the dissolution of strontium ions during the standing state of the strontium mineralization filter core can be adjusted, so that the strontium ion concentration in the first cup of water after the strontium mineralization filter core is standing can meet the safety upper limit requirement, and the strontium concentration in the water produced during the water passing period of the strontium mineralization filter core can meet the design lower limit requirement (the national standard GB8537 for drinking natural mineral water requires that the strontium concentration is greater than or equal to 0.2 mg / L).

[0059] Mechanism of metasilicic acid passivated strontium ore reducing strontium ion dissolution:

[0060] (1) The metasilicic acid (H2SiO3) is generated by the hydrolysis of silicate ore powder, and part of the metasilicic acid is dissolved in water to generate HSiO3 - :

[0061] H2SiO3 H + +HSiO3 - .

[0062] (2) HSiO3 - is adsorbed on the surface of strontium ore powder (main component SrSO4) to form a surface complex:

[0063] HSiO3 - +SrSO4 (s)→SrSO4·HSiO3 - (s).

[0064] (3) The surface complex SrSO4·HSiO3 - physically blocks water molecules from contacting SrSO4, slowing down the dissolution rate of strontium ions.

[0065] The above-mentioned strontium mineralization filter core can continuously dissolve metasilicic acid from the silicate ore powder during the standing period of each filter core during the service life of the filter core, so as to achieve long-term and effective passivation of the strontium ore powder and realize long-acting and controllable release of strontium ions.

[0066] It is found that mixing silicate ore powder and strontium ore powder directly in the same layer affects the release concentration of strontium ions during the water passing through the filter core, resulting in a low strontium ion concentration in the purified water. It can be understood that in some examples, the content of silicate ore powder in the outer layer of the strontium mineralized filter core is zero.

[0067] In some examples, the strontium mineralized filter core has a ring-shaped cross section of the inner layer, and the outer layer is sleeved on the periphery of the inner layer.

[0068] Referring to Figure 1 In some examples, the strontium mineralized filter core includes an inner layer 10 and an outer layer 20 arranged on the outer surface of the inner layer 10, the cross section of the inner layer 10 is ring-shaped, the outer layer 20 is sleeved on the periphery of the inner layer 10, the outer layer 20 is used for communication with the water inlet, and the inner layer 10 is used for communication with the water outlet.

[0069] In some examples, the strontium mineralized filter core has a hollow structure of the inner layer 10, and the hollow structure of the inner layer 10 is used for communication with the water outlet.

[0070] It can be understood that the mass ratio of strontium ore powder to silicate ore powder includes but is not limited to 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, 4:1, 4.5:1, 5:1, 5.5:1, 6:1; in some examples, it can be within the range formed by any two of these point values as end values. Alternatively, the mass ratio of strontium ore powder to silicate ore powder is 1-4:1.

[0071] In some examples, the strontium mineralized filter core has a particle size of the strontium ore powder greater than that of the silicate ore powder. By controlling the particle size of the strontium ore powder to be greater than that of the silicate ore powder, the metasilicic acid in the silicate ore powder is preferentially dissolved in the static state, achieving the effect of inhibiting the release of strontium ions in the strontium ore powder, thereby further regulating the concentration of strontium ions in the first cup of water after the filter core is placed.

[0072] In some examples, the strontium mineralized filter cartridge has a difference between the minimum particle size of the strontium ore powder and the maximum particle size of the silicate ore powder in a range from 100 μιη to 500 μιη. It is to be understood that the difference between the minimum particle size of the strontium ore powder and the maximum particle size of the silicate ore powder includes, but is not limited to, 100 μιη, 120 μιη, 140 μιη, 160 μιη, 180 μιη, 200 μιη, 220 μιη, 240 μιη, 260 μιη, 280 μιη, 300 μιη, 320 μιη, 340 μιη, 360 μιη, 380 μιη, 400 μιη, 420 μιη, 440 μιη, 460 μιη, 480 μιη, 500 μιη; by controlling the difference between the minimum particle size of the strontium ore powder and the maximum particle size of the silicate ore powder, the concentration of strontium ions in the first cup of water after the filter cartridge is left to stand can be further regulated. Optionally, the difference between the minimum particle size of the strontium ore powder and the maximum particle size of the silicate ore powder is in a range from 200 μιη to 400 μιη.

[0073] In some examples, the strontium mineralized filter cartridge has a particle size of the strontium ore powder in a range from 18 mesh to 60 mesh. It is to be understood that the particle size of the strontium ore powder refers to the absolute particle size; the strontium ore powder can pass through a 60 mesh sieve and cannot pass through an 18 mesh sieve; further, the particle size of the strontium ore powder includes, but is not limited to, 18 mesh, 20 mesh, 24 mesh, 30 mesh, 35 mesh, 40 mesh, 45 mesh, 50 mesh, 60 mesh; it is to be understood that in some examples, the particle size of the strontium ore powder is in a range from 250 μιη to 1000 μιη; further, the particle size of the strontium ore powder includes, but is not limited to, 250 μιη, 300 μιη, 350 μιη, 400 μιη, 425 μιη, 450 μιη, 500 μιη, 550 μιη, 600 μιη, 650 μιη, 700 μιη, 750 μιη, 800 μιη, 850 μιη, 900 μιη, 950 μιη, 1000 μιη; in some examples, the range can be formed by any two of these point values as end values. Optionally, the particle size of the strontium ore powder is in a range from 18 mesh to 30 mesh. By controlling the particle size of the strontium ore powder, the release rate of strontium ions in the strontium ore powder is adjusted.

[0074] In some examples, the strontium mineralization filter element includes a silicate ore powder having a particle size of 60-300 mesh. It can be appreciated that the particle size of the silicate ore powder refers to an absolute particle size; further, the particle size of the silicate ore powder includes but is not limited to 60 mesh, 70 mesh, 80 mesh, 100 mesh, 120 mesh, 150 mesh, 180 mesh, 200 mesh, 250 mesh, 300 mesh; it can be appreciated that in some examples, the particle size of the silicate ore powder is 45 μm-250 μm; further, the particle size of the silicate ore powder includes but is not limited to 45 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, 210 μm, 220 μm, 230 μm, 240 μm, 250 μm. In some examples, a range can be formed by any two of these point values as end values. Alternatively, the particle size of the silicate ore powder is 100-200 mesh. By controlling the particle size of the silicate ore powder, the metasilicic acid in the silicate ore powder is dissolved in a timely manner in a static state, and penetrates to the outer layer in a timely manner to achieve the effect of inhibiting the release of strontium ions in the strontium ore powder.

[0075] In some examples, the strontium mineralization filter element includes a strontium ore powder including at least one of celestite and strontiumite.

[0076] In some examples, the strontium mineralization filter element includes a strontium ore powder that is a modified strontium ore treated by heat activation and microwave radiation in sequence.

[0077] In some examples, the strontium mineralization filter element includes a silicate ore powder including at least one of zeolite and wollastonite.

[0078] In some examples, the strontium mineralization filter element includes a silicate ore powder that is a modified silicate ore treated by alkali.

[0079] In some examples, the strontium mineralization filter element includes an outer layer further including activated carbon and glue powder.

[0080] Alternatively, the glue powder includes polyethylene glue powder.

[0081] Optionally, the outer layer includes, by mass fraction: strontium ore powder 10-25 parts, activated carbon 80-120 parts, and glue powder 40-100 parts. It can be understood that in the outer layer, the strontium ore powder includes but is not limited to 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, and 25 parts, by mass fraction; the activated carbon includes but is not limited to 80 parts, 82 parts, 84 parts, 86 parts, 88 parts, 90 parts, 92 parts, 94 parts, 96 parts, 98 parts, 100 parts, 102 parts, 104 parts, 106 parts, 108 parts, 110 parts, 112 parts, 114 parts, 116 parts, 118 parts, and 120 parts, by mass fraction; and the glue powder includes but is not limited to 40 parts, 42 parts, 45 parts, 48 parts, 50 parts, 52 parts, 55 parts, 58 parts, 60 parts, 62 parts, 65 parts, 68 parts, 70 parts, 72 parts, 75 parts, 78 parts, 80 parts, 82 parts, 85 parts, 88 parts, 90 parts, 92 parts, 95 parts, 98 parts, and 100 parts, by mass fraction.

[0082] In some examples, the strontium mineralization filter element includes an outer layer composed of strontium ore powder, activated carbon, and glue powder.

[0083] In some examples, the strontium mineralization filter element includes an inner layer further including activated carbon and glue powder.

[0084] Optionally, the inner layer includes, by mass fraction: silicate ore powder 2-20 parts, activated carbon 80-120 parts, and glue powder 40-100 parts. It can be understood that in the inner layer, the silicate ore powder includes but is not limited to 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, and 20 parts, by mass fraction; the activated carbon includes but is not limited to 80 parts, 82 parts, 84 parts, 86 parts, 88 parts, 90 parts, 92 parts, 94 parts, 96 parts, 98 parts, 100 parts, 102 parts, 104 parts, 106 parts, 108 parts, 110 parts, 112 parts, 114 parts, 116 parts, 118 parts, and 120 parts, by mass fraction; and the glue powder includes but is not limited to 40 parts, 42 parts, 45 parts, 48 parts, 50 parts, 52 parts, 55 parts, 58 parts, 60 parts, 62 parts, 65 parts, 68 parts, 70 parts, 72 parts, 75 parts, 78 parts, 80 parts, 82 parts, 85 parts, 88 parts, 90 parts, 92 parts, 95 parts, 98 parts, and 100 parts, by mass fraction.

[0085] In some examples, the strontium mineralization filter element includes an inner layer composed of silicate ore powder, activated carbon, and glue powder.

[0086] An embodiment of the present application provides a preparation method of a strontium mineralization filter element, including the following steps:

[0087] Preparation of the inner layer and the outer layer arranged on the outer surface of the inner layer, the outer layer is used for communication with the water inlet, and the inner layer is used for communication with the water outlet, the inner layer comprises silicate ore powder, and the outer layer comprises strontium ore powder; the mass ratio of the strontium ore powder to the silicate ore powder is 1-6:1.

[0088] It can be understood that the present application does not limit the order of preparation of the inner layer and the outer layer.

[0089] In some examples, the preparation method of the strontium mineralized filter element comprises the following steps:

[0090] Mixing the strontium ore powder, the activated carbon and the glue powder to prepare a strontium mineralized carbon rod;

[0091] Mixing the silicate ore powder, the activated carbon and the glue powder to prepare a silicate mineralized carbon rod;

[0092] The strontium mineralized carbon rod and the silicate mineralized carbon rod are both hollow structures, and the outer diameter of the silicate mineralized carbon rod is less than or equal to the inner diameter of the strontium mineralized carbon rod;

[0093] The strontium mineralized carbon rod is sleeved on the outer side of the silicate mineralized carbon rod, the strontium mineralized carbon rod is used for communication with the water inlet, and the silicate mineralized carbon rod is used for communication with the water outlet.

[0094] It can be understood that the present application does not limit the specific size of the inner diameter and the outer diameter of the silicate mineralized carbon rod and the strontium mineralized carbon rod, and reasonable design can pass water. Alternatively, the inner diameter of the silicate mineralized carbon rod is greater than or equal to 10 mm; alternatively, the thickness of the silicate mineralized carbon rod is 7 mm-15 mm.

[0095] In some examples, the preparation method of the strontium mineralized filter element further comprises: arranging end covers at both ends of the strontium mineralized carbon rod after the strontium mineralized carbon rod is sleeved on the outer side of the silicate mineralized carbon rod.

[0096] In some examples, the preparation method of the strontium mineralized filter element, the preparation method of the strontium mineralized carbon rod or the preparation method of the silicate mineralized carbon rod comprises sintering or extrusion.

[0097] Alternatively, the sintering temperature is 350-450 DEG C. It can be understood that the sintering temperature includes but is not limited to 350 DEG C, 360 DEG C, 370 DEG C, 380 DEG C, 390 DEG C, 400 DEG C, 410 DEG C, 420 DEG C, 430 DEG C, 440 DEG C, 450 DEG C.

[0098] Alternatively, the extrusion temperature is 120-200 DEG C. It can be understood that the extrusion temperature includes but is not limited to 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C, 180 DEG C, 190 DEG C, 200 DEG C.

[0099] In other examples, the preparation method of the strontium mineralized filter element comprises the following steps:

[0100] A container having a water inlet and a water outlet is provided, a water-permeable partition is arranged in the container to divide the container into at least two parts, one part is in communication with the water inlet, and the other part is in communication with the water outlet, strontium ore powder is arranged in the part of the container connected with the water inlet, and silicate ore powder is arranged in the part of the container connected with the water outlet.

[0101] During the water passing through the filter core, the water first passes through the strontium ore powder and then passes through the silicate ore powder, the metasilicic acid dissolved in the water from the silicate ore powder can permeate to the surface of the strontium ore powder to passivate the strontium ore, reduce the dissolution of strontium ions, and thus reduce the concentration of strontium ions in the first cup of water, ensuring the safety of drinking water.

[0102] Optionally, the water-permeable partition comprises a non-woven fabric.

[0103] In some examples, the preparation method of the strontium mineralization filter core, the strontium ore powder is a modified strontium ore, and the preparation of the modified strontium ore comprises the following steps:

[0104] The strontium ore is sequentially subjected to heat activation treatment and microwave irradiation treatment to prepare the modified strontium ore.

[0105] By heat activation treatment of the strontium ore, the impurity content in the strontium ore can be reduced, and the specific surface area of the strontium ore can be increased, and then by microwave irradiation treatment, an "internal heating effect" is generated, the strontium ore is rapidly heated, micro-cracks are induced, and the specific surface area of the strontium ore is further increased, thereby improving the ability of the strontium ore to dissolve strontium ions.

[0106] In some examples, in the preparation of the modified strontium ore, the heat activation treatment is performed at a temperature of 400°C to 600°C for 12 hours to 48 hours. It can be understood that the temperature of the heat activation treatment includes but is not limited to 400°C, 420°C, 440°C, 460°C, 480°C, 500°C, 520°C, 540°C, 560°C, 580°C, 600°C, and the time includes but is not limited to 12h, 16h, 20h, 24h, 28h, 32h, 36h, 40h, 44h, 48h.

[0107] In some examples, in the preparation of the modified strontium ore, the microwave irradiation treatment is performed at a power of 200 W to 800 W for 10 minutes to 30 minutes. It can be understood that the power of the microwave irradiation treatment includes but is not limited to 200W, 250W, 300W, 350W, 400W, 450W, 500W, 550W, 600W, 650W, 700W, 750W, 800W, and the time includes but is not limited to 10min, 12min, 14min, 16min, 18min, 20min, 22min, 24min, 26min, 28min, 30min.

[0108] In some examples, the frequency of the microwave irradiation is 2.45 GHz.

[0109] In some examples, the preparation of the modified strontium ore further comprises the steps of washing, drying, cooling, grinding and sieving the strontium ore after the microwave irradiation.

[0110] It can be understood that, in some examples, the strontium ore after the thermal activation is a crushed strontium ore particle.

[0111] In some examples, the preparation method of the strontium mineralization filter core, the silicate ore powder is a modified silicate ore, and the preparation of the modified silicate ore comprises the following steps:

[0112] After the silicate ore, the quicklime and the water are mixed for the alkalization treatment, the modified silicate ore is prepared by neutralizing the carbon dioxide.

[0113] The alkalization treatment of the silicate ore and the quicklime can increase the specific surface area of the silicate ore, and the neutralization of the alkalinity by the carbon dioxide can improve the ability of the silicate ore to dissolve metasilicic acid.

[0114] In some examples, the preparation of the modified silicate ore, the mass ratio of the silicate ore to the quicklime is 4-6:1.

[0115] In some examples, the preparation of the modified silicate ore, after the reaction of the carbon dioxide, the modified silicate ore is prepared by filtering, drying, cooling, grinding and sieving.

[0116] It can be understood that, in some examples, the preparation of the modified silicate ore, the silicate ore is a crushed silicate ore particle.

[0117] An embodiment of the present application provides a water purifier comprising the strontium mineralization filter core or the strontium mineralization filter core prepared by the preparation method of the strontium mineralization filter core.

[0118] The water purifier provided by the present application comprises the strontium mineralization filter core or the strontium mineralization filter core prepared by the preparation method of the strontium mineralization filter core, which can release strontium ions into water and ensure the safety of drinking water.

[0119] It can be understood that the strontium mineralization filter core or the strontium mineralization filter core prepared by the preparation method of the strontium mineralization filter core can be used in the last stage of the water purifier.

[0120] The present application will be further described in detail with reference to the specific embodiments. However, the embodiments of the present application are not limited thereto.

[0121] The powder used in each of the embodiments and comparative examples is polyethylene powder.

[0122] Embodiment 1

[0123] (1) Strontium ore (lapis lazuli) is crushed and then heat-activated at 600°C for 24 hours, followed by microwave irradiation treatment (power of 200 W, frequency of 2.45 GHz, time of 30 minutes), and then deionized water washing, drying, cooling, grinding and sieving to obtain 18-30 mesh particles, to obtain modified strontium ore (modified lapis lazuli powder);

[0124] (2) Silicate ore (zeolite) is crushed and mixed with quicklime at a mass ratio of 6:1, deionized water is added and stirred uniformly, carbon dioxide gas is introduced for reaction, and then left to stand for 18 hours, followed by filtration, drying, cooling, grinding and sieving to obtain 100-200 mesh particles, to obtain modified silicate ore (modified zeolite powder);

[0125] (3) 22 parts of the modified strontium ore are mixed with 100 parts of granular activated carbon and 80 parts of powder, and extruded at 200°C to form a strontium-mineralized carbon rod filter core with a hollow structure, with an inner diameter of D1;

[0126] (4) 8 parts of the modified silicate ore are mixed with 100 parts of granular activated carbon and 80 parts of powder, and extruded at 200°C to form a silicate-mineralized carbon rod filter core, with an outer diameter of D2, wherein D2=D1;

[0127] (5) The strontium-mineralized carbon rod filter core is sleeved outside the silicate-mineralized filter core and bonded with upper and lower end covers to form a strontium-mineralized slow-release filter core.

[0128] Embodiment 2

[0129] A filter bottle is provided, which has a water inlet and a water outlet, and a non-woven fabric is arranged inside the filter bottle, which divides the space inside the filter bottle into two parts, one part being in communication with the water inlet and the other part being in communication with the water outlet, the modified strontium ore (modified lapis lazuli powder) prepared in step (1) of embodiment 1 is loaded into the part in communication with the water inlet, and the modified silicate ore (modified zeolite powder) prepared in step (2) of embodiment 1 is loaded into the part in communication with the water outlet.

[0130] Embodiment 3

[0131] The embodiment is basically the same as embodiment 1, except that the silicate ore in step (2) of embodiment 1 is replaced by wollastonite.

[0132] Embodiment 4

[0133] The preparation of the strontium mineralized carbon rod filter element in step (3) of Example 1 is basically the same, except that the modified strontium ore is 15 parts, and the preparation of the silicate mineralized carbon rod filter element in step (4) is basically the same, except that the modified silicate ore is 15 parts, i.e., the mass ratio of strontium ore powder to silicate ore powder is 1:1.

[0134] Example 5

[0135] The preparation of the strontium mineralized carbon rod filter element in step (3) of Example 1 is basically the same, except that the modified strontium ore is 15 parts, and the preparation of the silicate mineralized carbon rod filter element in step (4) is basically the same, except that the modified silicate ore is 15 parts, i.e., the mass ratio of strontium ore powder to silicate ore powder is 1:1.

[0136] Comparative Example 1

[0137] The strontium mineralized carbon rod filter element prepared in step (3) of Example 1 is as follows:

[0138] (1) The strontium ore (fluorite) is crushed and then heat-activated at 600°C for 24 hours, followed by microwave irradiation treatment (power of 200 W, frequency of 2.45 GHz, and time of 30 minutes), and then washed with deionized water, dried, cooled, ground, and sieved to obtain 18-30 mesh particles to obtain modified strontium ore (modified fluorite powder);

[0139] (2) The modified strontium ore 22 parts is mixed with granular activated carbon 100 parts and glue powder 80 parts, and then extruded at 200°C to form a strontium mineralized carbon rod filter element with a hollow structure.

[0140] The filter elements prepared in each example and comparative example are rinsed for 30 minutes and then left to stand for 24 hours, and the strontium concentration of the first cup of water (300 mL) is tested, and the results are shown in Table 1; wherein the safe limit of the strontium concentration of drinking water is 7 ppm.

[0141] Table 1

[0142]

[0143] As can be seen from Table 1, the filter elements prepared in the examples can release strontium ions into water while ensuring the safety of drinking water.

[0144] Each technical feature of the above-described examples can be combined arbitrarily, and in order to make the description concise, not all possible combinations of each technical feature in the above-described examples are described, however, as long as the combinations of these technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0145] The above-described embodiments only express several implementation manners of the present application, facilitate specific and detailed understanding of the technical solutions of the present application, but cannot be understood as a limitation on the patent protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. It should be understood that, on the basis of the technical solutions provided by the present application, the technical solutions obtained by logical analysis, reasoning or limited experiments by the skilled person in the art all belong to the protection scope of the appended claims of the present application. Therefore, the patent protection scope of the present application should be subject to the content of the appended claims, and the description can be used to explain the content of the claims.

Claims

1. A strontium mineralized filter element, characterized in that, The device includes an inner layer and an outer layer disposed on the outer surface of the inner layer. The outer layer is used to communicate with the water inlet, and the inner layer is used to communicate with the water outlet. The inner layer includes silicate ore powder, and the outer layer includes strontium ore powder. The mass ratio of the strontium ore powder to the silicate ore powder is 1 to 6:1, and the particle size of the strontium ore powder is larger than that of the silicate ore powder.

2. The strontium mineralization filter element as described in claim 1, characterized in that, The mass ratio of the strontium ore powder to the silicate ore powder is 1~4:

1.

3. The strontium mineralized filter element as described in claim 1, characterized in that, The difference between the minimum particle size of the strontium ore powder and the maximum particle size of the silicate ore powder is 100 μm to 500 μm.

4. The strontium mineralized filter element as described in claim 1, characterized in that, The strontium mineralized filter element satisfies: (1) The particle size of the strontium ore powder is 18-60 mesh; and / or (2) The particle size of the silicate ore powder is 60~300 mesh.

5. The strontium mineralization filter element as described in claim 1, characterized in that, The inner layer has a ring-shaped cross-section, and the outer layer is fitted around the inner layer.

6. The strontium mineralized filter element according to any one of claims 1 to 5, characterized in that, The strontium mineralized filter element satisfies: (1) The strontium ore powder includes at least one of celestite and strontium ore; and / or (2) The silicate ore powder includes at least one of zeolite and wollastonite.

7. The strontium mineralized filter element according to any one of claims 1 to 5, characterized in that, Both the inner and outer layers further include activated carbon and adhesive powder, and the strontium mineralized filter element satisfies the following requirements: (1) By mass, the outer layer comprises: 10-25 parts of strontium ore powder, 80-120 parts of activated carbon, and 40-100 parts of adhesive powder; and / or (2) By mass, the inner layer comprises: 2-20 parts of silicate ore powder, 80-120 parts of activated carbon and 40-100 parts of adhesive powder.

8. A method for preparing a strontium mineralized filter element, characterized in that, Includes the following steps: An inner layer and an outer layer disposed on the outer surface of the inner layer are prepared. The outer layer is used to communicate with the water inlet, and the inner layer is used to communicate with the water outlet. The inner layer includes silicate ore powder, and the outer layer includes strontium ore powder. The mass ratio of the strontium ore powder to the silicate ore powder is 1~6:1, and the particle size of the strontium ore powder is larger than that of the silicate ore powder.

9. The method for preparing the strontium mineralized filter element as described in claim 8, characterized in that, The preparation method of the strontium mineralized filter element includes the following steps: Strontium mineralized carbon rods are prepared by mixing strontium ore powder, activated carbon, and adhesive powder. Silicate mineralized carbon rods are prepared by mixing silicate ore powder, activated carbon, and adhesive powder. Both the strontium mineralized carbon rod and the silicate mineralized carbon rod have a hollow structure, and the outer diameter of the silicate mineralized carbon rod is less than or equal to the inner diameter of the strontium mineralized carbon rod. The strontium mineralized carbon rod is sleeved on the outside of the silicate mineralized carbon rod, the strontium mineralized carbon rod is used to communicate with the water inlet, and the silicate mineralized carbon rod is used to communicate with the water outlet.

10. The method for preparing the strontium mineralized filter element according to any one of claims 8 to 9, characterized in that, The preparation method of the strontium mineralized filter element satisfies the following requirements: (1) The strontium ore powder is modified strontium ore, and the preparation of the modified strontium ore includes the following steps: Modified strontium ore is prepared by sequentially subjecting strontium ore to thermal activation and microwave radiation treatment; and / or (2) The silicate ore powder is a modified silicate ore, and the preparation of the modified silicate ore includes the following steps: Modified silicate ore is prepared by mixing silicate ore, quicklime, and water for alkalization treatment, followed by neutralization with carbon dioxide.

11. A water purifier, characterized in that, The strontium mineralization filter element includes the strontium mineralization filter element as described in any one of claims 1 to 7 or the strontium mineralization filter element as described in any one of claims 8 to 10.

Images