WO2023109971A1

WO2023109971A1 - Mineralized filter element and preparation method therefor

Info

Publication number: WO2023109971A1
Application number: PCT/CN2022/139917
Authority: WO
Inventors: 武中华; 李键; 谭俊
Original assignee: 青岛海尔施特劳斯水设备有限公司; 海尔智家股份有限公司
Priority date: 2021-12-17
Filing date: 2022-12-19
Publication date: 2023-06-22
Also published as: CN114229981A

Abstract

The present invention relates to the technical field of the preparation of mineralized materials, and particularly provides a mineralized filter element and a preparation method therefor, with the aim to solve the problem of the unstable precipitation of mineral substances in existing mineralized filter elements. In order to achieve the purpose, the mineralized filter element of the present invention comprises the following raw materials in parts by weight: main materials: 1-40 parts of modified dolomite, 1-20 parts of modified calcite, 1-6 parts of modified hydrozincite, 1-6 parts of modified zeolite, and 1-4 parts of modified bryozoatum. Water filtered by the mineralized filter element is rich in beneficial mineral substances such as zinc and strontium, and reaches the national drinking water standard in China; moreover, under the interaction of the aforementioned raw materials, especially by means of the combined use of the modified bryozoatum and the modified hydrozincite, the mineralized filter element can effectively inhibit the precipitation of heavy metals such as lead, and there are no heavy metals exceeding the standard, thereby further ensuring the safety of the drinking water.

Description

Mineralized filter element and preparation method thereof

technical field

The invention relates to the technical field of preparation of mineralized materials, and specifically provides a zinc and strontium mineralized filter element and a preparation method thereof.

Background technique

Water is an indispensable substance in people's life, so drinking water health is particularly important. At present, household water purifiers have gradually entered thousands of households to provide residents with safe drinking water. For example, reverse osmosis water purifiers use reverse osmosis membranes to filter tap water, with a precision of up to 0.1nm and a desalination rate of up to 95%, which can filter out almost all substances in tap water. In the environment where the water quality varies greatly across the country, the reverse osmosis water purifier provides a safer water quality filtration technology. However, the lack of minerals in the water quality, long-term drinking is not conducive to health.

In order to solve the above problems, water quality mineralization technology is used in the prior art to increase the content of minerals in water. At present, there are mainly three mineralization methods: the first is to add mineralization liquid to water, and the second is to add mineral additives to water. The third is to mix and granulate soluble calcium salt, magnesium salt, potassium salt, sodium salt and clay to prepare mineralized balls. At present, mineralized balls are the main product on the market, but their dissolution in the early stage is not controlled, especially under soaking conditions, the precipitation of various minerals is unstable, and it cannot provide healthy water in the true sense.

Therefore, there is a need in the art for a new mineralization filter element and a preparation method thereof to solve the above problems.

Contents of the invention

The present invention aims to solve the above-mentioned technical problems, that is, solve the problem of unstable mineral precipitation in existing mineralization filter elements.

In a first aspect, the present invention provides a mineralization filter element, comprising the following raw materials in parts by weight: main ingredients: 1-40 parts of modified dolomite, 1-20 parts of modified calcite, 1 part of modified hydrozincite ～6 parts, 1～6 parts of modified zeolite, 1～4 parts of modified sea pumice.

In the preferred technical scheme of the above-mentioned mineralization filter element, the raw materials in the following parts by weight are included: main ingredients: 5 to 20 parts of modified dolomite, 10 parts of modified calcite, 3 parts of modified hydrozincite, and 3 parts of modified zeolite Parts, 2 parts of modified sea pumice.

In the preferred technical solution of the above mineralization filter element, the following raw materials are also included in parts by weight: auxiliary materials: 50-240 parts of activated carbon, and 10-90 parts of binder.

In the preferred technical solution of the above-mentioned mineralization filter element, it is made of the following raw materials in parts by weight: 50-70 parts of main materials; 130-165 parts of auxiliary materials, of which 100-120 parts of activated carbon and 30-45 parts of binder .

In a second aspect, the present invention provides a method for preparing the mineralized filter element described in any one of the preferred technical solutions, the preparation method comprising the following steps: modifying: respectively treating dolomite, calcite, hydrozincite, Zeolite and sea pumice are modified to obtain modified dolomite, modified calcite, modified hydrozincite, modified zeolite and modified sea pumice; ingredients: weigh the modified dolomite, the Modified calcite, the modified hydrozinsite, the modified zeolite, the modified sea pumice, activated carbon and binder; mixing: the weighed modified dolomite, the modified calcite , the modified hydrozinsite, the modified zeolite and the modified sea pumice are mixed with the activated carbon and the binder according to a preset method to obtain a mixture; sintering molding: the mixture put into a grinding tool for sintering to obtain the mineralized filter element.

In the preferred technical solution of the above preparation method, the modified dolomite is prepared by the following method: ultrasonically washing, drying, pulverizing, grinding and sieving the dolomite to obtain pretreated dolomite; Treat the dolomite at 700-800°C for 0.5-1.5 hours, and after cooling, obtain calcined modified dolomite; soak the calcined modified dolomite in 150-250ml of water for 20-40min, and soak the surface of the dolomite after soaking After the water is removed, put it in a tube furnace, feed _CO2 gas at a flow rate of 0.01-1.0L/min, carbonize at 400-500°C for 1.0-3.0h, and cool to obtain the modified dolomite; wherein, The mesh number of the modified dolomite is 20-140 mesh.

In the preferred technical solution of the above preparation method, the modified calcite is prepared by the following method: crushing and sieving the calcite to obtain pretreated calcite; performing ultrasonic washing, filtering and drying the pretreated calcite and sieving treatment to obtain the modified calcite; wherein, the mesh number of the modified calcite is 80-220 mesh.

In the preferred technical solution of the above preparation method, the modified hydrozincite is prepared by the following method: crushing, sieving, ultrasonic washing, filtering and drying the hydrozincite to obtain pretreated hydrozincite; The pretreated hydrozincite is soaked in 0.8-1.2mol/L inorganic acid solution for 3-5 hours, the soaking temperature is 20-30°C, and acid-modified hydrozincite is obtained after washing; the acid-modified hydrozinc Soak ore in 1.0-1.4mol/L inorganic salt solution for 14-22 hours to obtain salt-modified hydrozincite; shake and shake the salt-modified hydrozincite at 20-30°C, and shake the The hydrozincite is washed and dried to obtain the modified hydrozincite; wherein, the mesh size of the modified hydrozincite is 80-350 mesh.

In the preferred technical scheme of the above preparation method, the modified zeolite is prepared by the following method: crushing, sieving, ultrasonic washing and drying the zeolite to obtain a pretreated zeolite; Calcined at 550°C for 1.5 to 3.5 hours, and after cooling, a calcined modified zeolite was obtained; using a 150 to 350W microwave, microwave modified the calcined modified zeolite to obtain a microwave modified zeolite; the microwave modified zeolite was heated at 0.8 to Soak in 1.2mol/L inorganic acid solution for 3-5 hours, the soaking temperature is 20-30°C, and get acid-modified zeolite after washing; soak the acid-modified zeolite in 0.5-0.9mol/L inorganic salt solution 22 to 26 hours, and oscillating for 3 to 8 minutes at intervals of 4 to 5 hours to obtain a salt-modified zeolite; performing solid-liquid separation, ultrasonic washing, drying and sieving on the salt-modified zeolite to obtain the modified zeolite; wherein , the mesh number of the modified zeolite is 20-120 mesh.

In the preferred technical solution of the above preparation method, the modified sea pumice is prepared by the following method: pulverizing, sieving, ultrasonic washing and drying the sea pumice to obtain pretreated sea pumice; The pumice is soaked in the organic acid solution for 27-37 hours to obtain the acid-modified pumice; the acid-modified pumice is shaken at 20-30° C., and the shaken pumice is washed and dried to obtain The modified sea pumice; wherein, the mesh of the modified sea pumice is 40-220 mesh.

In the preferred technical scheme of the above-mentioned preparation method, "the modified dolomite, the modified calcite, the modified hydrozinsite, the modified zeolite and the modified sea pumice obtained by weighing are The preset method is mixed with activated carbon and binder to obtain the "mixture". The step specifically includes: weighing the modified dolomite, the modified calcite, the modified hydrozinsite, the modified The non-toxic zeolite and the modified sea pumice are uniformly mixed to obtain a mineralized filter material; the mineralized filter material, the activated carbon and the binder are uniformly mixed to obtain the mixed material.

In the preferred technical scheme of the above-mentioned preparation method, "the modified dolomite, the modified calcite, the modified hydrozinsite, the modified zeolite and the modified sea pumice obtained by weighing are The preset method is mixed with activated carbon and binder to obtain the "mixture". The step specifically includes: weighing the modified dolomite, the modified calcite, the modified hydrozinsite, the modified The active zeolite and the modified sea pumice are sequentially mixed with the activated carbon and the binder according to the order of density from small to large to obtain the mixture.

In the preferred technical solution of the above preparation method, the step of "putting the mixed material into a grinding tool for sintering to obtain a mineralized filter element" specifically includes: putting the mixed material into a grinding tool, Sintering for 20-60 minutes, the sintering pressure is 12-18 MPa, and the mineralized filter element is obtained after cooling.

In the preferred technical solution of the above-mentioned mineralization filter element, the present invention adopts modified dolomite, modified calcite, modified hydrozincite, modified zeolite and modified sea pumice as raw materials to prepare mineralization filter element, wherein dolomite can be separated out Strontium, calcium, magnesium elements, calcite can precipitate calcium and adjust the pH value, zeolite can absorb heavy metals, hydrozincite can precipitate zinc, sea pumice can effectively inhibit the precipitation of heavy metals such as lead, especially modified sea pumice and modified The combined use of hydrozinc ore enables the mineralization filter element to precipitate zinc while effectively inhibiting the precipitation of heavy metals such as lead, ensuring that no heavy metals exceed the standard, ensuring the safety of drinking water, and obtaining a stable precipitation of zinc, strontium, etc. mineral filter. Under the cooperation of the above raw materials, the water filtered by the mineralized filter element not only contains elements such as calcium and magnesium, but also is rich in beneficial minerals such as zinc and strontium, which meets the national drinking water standard and can serve users Provide safe healthy water.

Further, the weighed modified dolomite, modified calcite, modified hydrozincite, modified zeolite and modified sea pumice are mixed with activated carbon and binder in order of density from small to large, so that The raw materials can be mixed more evenly, and the water improvement effect is also more uniform and stable.

Description of drawings

Describe control method of the present invention below with reference to accompanying drawing, in accompanying drawing:

Fig. 1 is the flow chart of the preparation method of the mineralization filter core of the present invention.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention. For example, although the present application is described in conjunction with hydrochloric acid, the technical solution of the present invention is not limited thereto, and other inorganic acids such as sulfuric acid, carbonic acid, and nitric acid can also be used in practical applications.

The test methods in the following examples, unless otherwise specified, are conventional methods; the raw materials, reagent materials, etc. used in the following examples, unless otherwise specified, are commercially available products.

Based on the technical problems proposed in the background technology, the present invention provides a machine preparation method for mineralized filter material, aiming at using modified dolomite, modified calcite, modified hydrozincite, modified zeolite and modified sea pumice as Raw materials are used to prepare mineralized filter elements. Among them, dolomite can precipitate strontium, calcium, and magnesium elements, calcite can precipitate calcium elements and adjust the pH value, zeolite can absorb heavy metals, hydrozincite can precipitate zinc elements, sea pumice can effectively inhibit lead and other heavy metals The precipitation, especially the combined use of modified sea pumice and modified hydrozincite, enables the mineralization filter element to precipitate zinc while effectively inhibiting the precipitation of heavy metals such as lead, ensuring that no heavy metals exceed the standard, ensuring the safety of drinking water, and obtaining A filter element that can stably precipitate beneficial minerals such as zinc and strontium has been developed. Under the cooperation of the above raw materials, the water filtered by the mineralized filter element not only contains elements such as calcium and magnesium, but also is rich in beneficial minerals such as zinc and strontium, which meets the national drinking water standard and can serve users Provide safe healthy water.

Referring first to FIG. 1 , the preparation method of the mineralization filter element of the present invention will be described. Wherein, Fig. 1 is a flow chart of the preparation method of the mineralization filter element of the present invention.

As shown in Figure 1, the preparation method of mineralization filter element comprises the following steps:

S100. Modification: modifying dolomite, calcite, hydrozinite, zeolite and sea pumice respectively to obtain modified dolomite, modified calcite, modified hydrozinite, modified zeolite and modified sea pumice;

S200, ingredients: weigh modified dolomite, modified calcite, modified hydrozincite, modified zeolite, modified sea pumice, activated carbon and binder respectively according to parts by weight;

S300, mixing: mixing the weighed modified dolomite, modified calcite, modified hydrozincite, modified zeolite and modified sea pumice with activated carbon and binder according to a preset method to obtain a mixture;

S400, sintering and forming: putting the mixture into a grinding tool for sintering to obtain a mineralized filter element.

Wherein, the binder is other binders such as polyethylene and polyvinyl chloride.

The modification methods of dolomite, calcite, hydrozincite, zeolite and sea pumice are described respectively below. Among them, dolomite, calcite, hydrozincite, zeolite and sea pumice are all natural.

Modified dolomite is prepared by the following method:

Dolomite is ultrasonically washed, then dried at 100°C, and the dried dolomite is crushed, ground and sieved to obtain pretreated dolomite. Preferably, the pretreated dolomite has a mesh number of 20 to 140 mesh, Further, the mesh size of the pretreated dolomite is 40-120 mesh.

The pretreated dolomite is put into a muffle furnace, calcined at 750° C. for 1.0 h, and after cooling, the calcined modified dolomite is obtained, which is put into a desiccator for airtight storage.

Soak the calcined modified dolomite in 200ml of deionized water for 30 minutes, absorb the water on the surface of the soaked dolomite with filter paper, or dry it naturally or dry it, spread it in a crucible, and place the crucible in a tube furnace In the process, CO ₂ gas was introduced at a flow rate of 0.5L/min, and the carbonization reaction was carried out at 450°C for 2.0h. After cooling, the final modified dolomite was obtained and stored in a desiccator. Wherein, the time for the tube furnace to heat up to 450° C. is 40 minutes. Wherein, the modified dolomite obtained by modification has a mesh size of 20-140 mesh, and further, the modified dolomite has a mesh size of 40-120 mesh.

It should be noted that the drying temperature, calcination temperature, calcination time, immersion water amount, immersion time, _CO gas flow rate, carbonization reaction temperature, carbonization reaction time, and carbonization reaction heating time listed above are only exemplary and not limiting. Specifically, the drying temperature can also be other temperatures such as 80°C and 120°C; the calcining temperature can also be other temperatures such as 700°C and 800°C; the calcining time can also be other times such as 0.5h and 1.5h; the amount of soaking water can also be 150m, 250ml and other water volumes, and can also be soaked in ultrapure water or tap water; the soaking time can also be 20min, 30min and other times; the flow rate of CO ₂ gas can also be 0.01L/min, 0.1L/min, 1.0L /min and other flow rates; the carbonization reaction temperature can also be 400°C, 500°C and other temperatures; the carbonization reaction time can also be 1.0h, 2.0h and other times; the carbonization reaction heating time can also be 30min, 50min and other times . In practical applications, those skilled in the art can combine the above parameters arbitrarily.

Modified calcite is prepared by the following method:

The calcite is crushed and sieved, and 80-220 mesh calcite is screened out. Preferably, 100-200 mesh calcite is screened out, and deionized water is used to wash the screened calcite with ultrasonic wave, filter, and put into drying in an oven, and sieving again to obtain modified calcite, that is, physically modified calcite. Wherein, the mesh number of the modified calcite is 80-220 mesh, and further, the mesh number of the modified calcite is 100-200 mesh. Of course, ultrapure water or tap water can also be used to wash the pretreated calcite.

Modified hydrozincite is prepared by the following method:

Grinding and sieving the hydrozincite, sieving out 80-350 mesh hydrozincite, preferably, screening out 100-325 mesh hydrozincite, and then using deionized water to treat the screened hydrozincite Ultrasonic washing is performed, filtered, and dried in an oven to obtain pretreated hydrozincite.

The pretreated hydrozincite was soaked in 1.0 mol/L hydrochloric acid solution for 4 hours at a constant temperature of 25° C., and washed with deionized water to obtain the acid-modified hydrozincite.

Soak acid-modified hydrozincite in 1.2mol/L sodium carbonate solution for 18 hours to obtain salt-modified hydrozincite. Shake the salt-modified hydrozincite at 25°C, and use deionized water to shake well. The final hydrozincite is washed, put into oven and dried to obtain modified hydrozincite; preferably, the mesh number of modified hydrozincite is 80～350 meshes, and further, the mesh number of modified hydrozincite is 100-325 mesh.

It should be noted that the inorganic acids listed above and their corresponding concentrations, soaking time, and soaking temperature, inorganic salts and their corresponding concentrations, soaking time, soaking temperature, and shaking temperature are only exemplary and not limiting. The inorganic acid can also be other inorganic acids such as sulfuric acid, nitric acid, carbonic acid, etc. The corresponding concentration of any inorganic acid can also be 0.8mol/L, 1.2mol/L, etc. The soaking time can also be 3h, 5h, etc. , the soaking temperature can also be other temperatures such as 20°C, 23°C, 27°C, 30°C; the inorganic salt can also be potassium carbonate, sodium chloride, potassium chloride and other inorganic salts, and the corresponding concentration of any inorganic salt can also be It can be 1.0mol/L, 1.4mol/L and other concentrations, and the soaking time can also be 14h, 16h, 20h, 22h and other times; the shaking temperature can also be 20℃, 30℃ and other temperatures. In practical applications, those skilled in the art can combine the above parameters arbitrarily. In addition, ultrapure water or tap water can also be used to wash the hydrozincite.

Modified zeolites are prepared by the following methods:

The zeolite is pulverized and sieved, and 20-120 mesh zeolite is screened out. Preferably, 40-100 mesh zeolite is screened out, and then deionized water is used to ultrasonically wash the screened zeolite for 1 hour, filter, and put Dry in an oven to obtain pretreated zeolite.

The pretreated zeolite is put into a muffle furnace, calcined at 450° C. for 2.0 h, and after cooling, the calcined modified zeolite is obtained, which is put into a desiccator for airtight storage.

The 200W microwave is used to carry out microwave modification on the calcined modified zeolite to obtain the microwave modified zeolite.

Soak the microwave-modified zeolite in a 1.0 mol/L hydrochloric acid solution for 4 hours at a temperature of 25° C., soak at a constant temperature, and wash with deionized water to obtain the acid-modified zeolite.

Soak the acid-modified zeolite in 0.7 mol/L sodium chloride solution for 24 hours, and shake it for 5 minutes every 6 hours to obtain the salt-modified zeolite.

The salt-modified zeolite is subjected to solid-liquid separation, repeated ultrasonic washing, drying and sieving treatment with deionized water to obtain a modified zeolite; wherein, the mesh number of the modified zeolite is 20-120 mesh, preferably, the modified zeolite is The mesh number of the non-toxic zeolite is 40-100 mesh.

It should be noted that the above listed ultrasonic cleaning time, calcination temperature, calcination time, microwave, inorganic acid and its corresponding concentration, soaking time, soaking temperature, inorganic salt and its corresponding concentration, soaking time, interval time and oscillation time , is only illustrative, not restrictive, the ultrasonic cleaning time can also be 0.5h, 1.5h and other times; the calcination temperature can also be 400°C, 500°C, 550°C and other temperatures; the calcination time can also be 1.5h , 3.0h, 3.5h and other times; 150W microwave, 300W microwave, 350W microwave and other microwaves can also be used; the inorganic acid can also be sulfuric acid, nitric acid, carbonic acid and other inorganic acids, and the corresponding concentration of any inorganic acid can also be 0.8mol/L, 1.2mol/L and other concentrations, soaking time can also be 3h, 5h and other times, soaking temperature can also be other temperatures such as 20°C, 23°C, 27°C, 30°C; inorganic salts can also be Potassium carbonate, sodium carbonate, potassium chloride and other inorganic salts, the concentration of any inorganic salt can be 0.5mol/L, 0.9mol/L and other concentrations, and the soaking time can also be 22h, 26h and other times ; The interval time can also be 5h, 7h and other times; the oscillation time can also be 3min, 8min and other times. In practical applications, those skilled in the art can combine the above parameters arbitrarily. In addition, ultrapure water or tap water can also be used to wash the zeolite.

Modified sea pumice is prepared by the following method:

Pulverize and sieve the sea pumice, sieve out 40-220 mesh sea pumice, preferably, sieve out 60-200 mesh sea pumice, and use deionized water to perform ultrasonic wave washing on the screened sea pumice, Filter and dry in an oven to obtain pretreated sea pumice.

Soak the pretreated sea pumice in acetic acid solution for 32 hours to obtain acid-modified sea pumice;

Shake the acid-modified sea pumice at a constant temperature of 25°C, wash the shaken sea pumice with deionized water, dry it in an oven, and obtain the modified sea pumice; preferably, the purpose of the modified sea pumice is The number is 40-220 mesh, and further, the mesh number of the modified sea pumice is 60-200 mesh.

It should be noted that the organic acids listed above and their corresponding concentrations, soaking time, and shaking temperature are only exemplary and not limiting. The organic acids can also be other organic acids such as citric acid and oxalic acid. The soaking time corresponding to the organic acid can also be 27h, 29h, 35h, 37h and other times; the shaking temperature can also be other temperatures such as 20°C and 30°C. In practical applications, those skilled in the art can combine the above parameters arbitrarily. In addition, sea pumice can also be washed by soaking in ultrapure water or tap water.

In addition, the obtained modified dolomite, modified calcite, modified hydrozincite, modified zeolite and modified sea pumice should be tested for chroma, turbidity, odor and taste in accordance with the GB 5479-2006 sanitary standard for drinking water. , Visible matter, pH and TDS were inspected, and the obtained modified dolomite and modified The content of aluminum, total chromium, manganese, iron, copper, zinc, arsenic, silver, cadmium, lead, antimony, nickel, tin, barium, etc. After inspection, only modified dolomite, modified calcite, modified hydrozincite, modified zeolite and modified sea pumice can be used if they meet the above standards and specifications, further ensuring the safety of drinking water. Through the above-mentioned modification method, the properties of dolomite, calcite, hydrozincite, zeolite and sea pumice are improved, and particles of different particle sizes are prepared for mixing with activated carbon particles, activated carbon fibers and binders.

The preparation method of the mineralized filter element of the present invention will be further described below with reference to three examples.

Embodiment one

Weigh the following ingredients:

Based on the weight of each serving as 10g, the main ingredients: 50g of modified dolomite, 100g of modified calcite, 30g of modified hydrozincite, 30g of modified zeolite, and 20g of modified sea pumice; Rock, modified calcite, modified hydrozincite, modified zeolite and modified pumice were mixed evenly to obtain 230g of mineralized filter material, that is, more mineralized filter material was mixed in advance for subsequent use.

Based on the weight of each part as 1g, weigh 70g of mineralized filter material (ie the main material after mixing); auxiliary materials: 100g of activated carbon, 30g of binder.

Mix 70g of mineralized filter material, 100g of activated carbon and 30g of binder evenly to obtain a mixture.

Put the mixture into the grinding tool, sinter at 100°C for 60min, and the sintering pressure is 12MPa, cool the sintered strontium-rich metasilicate carbon rod and put it into the filter shell to obtain the mineralized filter element.

Embodiment two

Weigh the following ingredients:

Based on the weight of each part as 1g, the main ingredients: 20g of modified dolomite, 14g of modified calcite, 6g of modified hydrozincite, 6g of modified zeolite, 4g of modified sea pumice; the modified dolomite obtained by weighing Rock, modified calcite, modified hydrozincite, modified zeolite and modified sea pumice are mixed uniformly to obtain 50 g of mineralized filter material;

Based on the weight of each serving as 1g, auxiliary materials: 120g of activated carbon, 45g of binder.

Mix 50g of mineralized filter material, 120g of activated carbon and 45g of binder evenly to obtain a mixture.

Put the mixture into the grinding tool, sinter at 160°C for 20min, and the sintering pressure is 18MPa, cool the sintered strontium-rich metasilicate carbon rod and put it into the filter shell to obtain the mineralized filter element.

Embodiment three

Weigh the following ingredients:

Based on the weight of each serving as 1g, main ingredients: 25g of modified dolomite, 15g of modified calcite, 5g of modified hydrozincite, 5g of modified zeolite, 3g of modified sea pumice; auxiliary materials: 110g of activated carbon, binder 40g.

25g modified dolomite, 15g modified calcite, 5g modified hydrozincite, 5g modified zeolite and 3g modified sea pumice were mixed with 110g activated carbon and 40g binder in order of density from small to large. Mixed to obtain a mixture. For example, fine-grained, low-density modified dolomite is mixed with activated carbon and binder first, and then modified zeolite, modified calcite, modified hydrozincite and modified sea pumice are mixed with activated carbon and binder in turn. to mix. Of course, in the process of actually adding raw materials, if the densities of the two raw materials are relatively close, the order of addition can also be determined according to the mesh number of the raw materials, for example, add the one with the smaller mesh number first, and then add the one with the larger mesh number.

Put the mixture into the grinding tool, sinter at 140°C for 40min, and the sintering pressure is 16MPa, cool the sintered strontium-rich metasilicate carbon rod and put it into the filter shell to obtain the mineralized filter element.

It should be noted that the proportions by weight of raw materials in the three examples listed above indicate that those skilled in the art can flexibly adjust and set the proportions by weight of raw materials according to actual water quality requirements in practical applications. Ratio, and adjust the sintering temperature, sintering time and sintering pressure accordingly according to the weight ratio of raw materials.

Further, a performance test was carried out on the mineralized filter element prepared by the above method, see Table 1 for details. The experimental method is: at room temperature, conduct a water test. When the water is passed, the flow rate of pure water is 2.0L/min. When the water flow reaches 1000L, 2000L, 3500L and 4300L, 250ml water samples are taken for testing.

It can be seen from Table 1 that when the influent water is pure water, zinc and strontium elements can still be precipitated stably under the condition of 4300L water flow, and the attenuation speed is slow, that is, the rich It is rich in beneficial minerals such as zinc and strontium, and has reached the national drinking water standard.

Table 1. Statistical table of functional test data of mineralized filter element

Further, the lead metal precipitation test was carried out on the mineralization filter element prepared by the above method, and the mineralization filter element prepared by the present invention was respectively combined with the hydrozincite filter element, the hydrozinc mineralization filter element with A ore added, and the hydrozinc mineralization filter element with B ore added. The effect of controlling the precipitation of lead metal in the hydrozinc mineralization filter element was compared. Among them, the A ore is such as volcanic rock, diatomaceous earth, kaolin and other ores, and the B ore is medical stone, zeolite, illite and other ores. Through comparison, it can be seen that the mineralization filter element prepared by the present invention includes sea pumice, modified sea pumice and modified hydrozincite. As can be seen from Table 2, adopting the mineralization filter element prepared by the present invention, when its addition amount reaches 20g, the precipitation of lead metal can be effectively controlled, heavy metals such as lead have been avoided exceeding the standard, and the safety of drinking water has been further ensured.

Table 2. Mineralization filter lead content test statistics

It should be pointed out that the above-mentioned embodiment is only a preferred embodiment of the present invention, and is only used to illustrate the principle of the method of the present invention, and is not intended to limit the protection scope of the present invention. In practical application, those skilled in the art The above function allocation can be completed by different steps according to needs, that is, the steps in the embodiment of the present invention are decomposed or combined. For example, the steps in the above embodiments may be combined into one step, or further divided into multiple sub-steps, so as to complete all or part of the functions described above. The names of the steps involved in the embodiments of the present invention are only used to distinguish each step, and are not considered to limit the present invention.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but those skilled in the art will easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

A mineralization filter element is characterized in that it comprises raw materials in the following parts by weight:

Main ingredients: 1-40 parts of modified dolomite, 1-20 parts of modified calcite, 1-6 parts of modified hydrozincite, 1-6 parts of modified zeolite, and 1-4 parts of modified sea pumice.
The mineralization filter element according to claim 1, is characterized in that, comprises the raw material by following weight part:

Main ingredients: 5-20 parts of modified dolomite, 10 parts of modified calcite, 3 parts of modified hydrozincite, 3 parts of modified zeolite, and 2 parts of modified sea pumice.
The mineralization filter element according to claim 1, is characterized in that, also comprises the raw material by following weight parts:

Excipients: 50-240 parts of activated carbon, 10-90 parts of binder.
The mineralization filter element according to claim 3, characterized in that, it is made of the following raw materials in parts by weight:

50-70 parts of main ingredients;

130-165 parts of auxiliary materials, including 100-120 parts of activated carbon and 30-45 parts of binder.
A preparation method of the mineralization filter core described in claim 3 or 4, is characterized in that, described preparation method comprises the following steps:

Modification: modify dolomite, calcite, hydrozincite, zeolite and sea pumice respectively to obtain modified dolomite, modified calcite, modified hydrozincite, modified zeolite and sea pumice;

Ingredients: weighing the modified dolomite, the modified calcite, the modified hydrozincite, the modified zeolite, the modified sea pumice, activated carbon and binder respectively according to parts by weight;

Mixing: mix the weighed modified dolomite, the modified calcite, the modified hydrozincite, the modified zeolite and the modified sea pumice with the activated carbon and the The binder is mixed to obtain a mixture;

Sintering molding: put the mixture into a grinding tool for sintering to obtain the mineralized filter element.
The preparation method according to claim 5, wherein the modified dolomite is prepared by the following method:

Ultrasonic washing, drying, crushing, grinding and sieving are performed on the dolomite to obtain pretreated dolomite;

calcining the pretreated dolomite at 700-800° C. for 0.5-1.5 hours, and cooling to obtain calcined modified dolomite;

Soak the calcined modified dolomite in 150-250ml of water for 20-40min, remove the moisture on the surface of the soaked dolomite, place it in a tube furnace, and feed CO2 gas at a flow rate of 0.01-1.0L/min , carbonization reaction at 400-500° C. for 1.0-3.0 hours, and after cooling, the modified dolomite is obtained;

Wherein, the mesh number of the modified dolomite is 40-120 mesh.
The preparation method according to claim 5, wherein the modified calcite is prepared by the following method:

The calcite is crushed and sieved to obtain pretreated calcite;

Performing ultrasonic washing, filtering, drying and sieving on the pretreated calcite to obtain the modified calcite;

Wherein, the mesh number of the modified calcite is 80-220 mesh.
The preparation method according to claim 5, wherein the modified hydrozincite is prepared by the following method:

crushing, sieving, ultrasonic washing, filtering and drying the hydrozincite to obtain pretreated hydrozincite;

Soak the pretreated hydrozincite in 0.8-1.2 mol/L inorganic acid solution for 3-5 hours, the soaking temperature is 20-30°C, and obtain acid-modified hydrozincite after washing;

Soaking the acid-modified hydrozincite in 1.0-1.4 mol/L inorganic salt solution for 14-22 hours to obtain salt-modified hydrozincite;

Shaking the salt-modified hydrozincite at 20-30° C., washing and drying the shaken hydrozincite to obtain the modified hydrozincite;

Wherein, the mesh size of the modified hydrozincite is 80-350 mesh.
The preparation method according to claim 5, wherein the modified zeolite is prepared by the following method:

The zeolite is pulverized, sieved, ultrasonically washed and dried to obtain a pretreated zeolite;

Calcining the pretreated zeolite at 400-550° C. for 1.5-3.5 hours, and cooling to obtain a calcined modified zeolite;

Using 150-350W microwaves to carry out microwave modification on the calcined modified zeolite to obtain microwave modified zeolite;

soaking the microwave-modified zeolite in a 0.8-1.2 mol/L inorganic acid solution for 3-5 hours at a temperature of 20-30°C, and obtaining the acid-modified zeolite after washing;

Soak the acid-modified zeolite in a 0.5-0.9 mol/L inorganic salt solution for 22-26 hours, and vibrate for 3-8 minutes every 5-7 hours to obtain a salt-modified zeolite;

performing solid-liquid separation, ultrasonic washing, drying and sieving on the salt-modified zeolite to obtain the modified zeolite;

Wherein, the mesh number of the modified zeolite is 20-120 mesh.
The preparation method according to claim 5, wherein the modified sea pumice is prepared by the following method:

crushing, sieving, ultrasonic washing and drying the sea pumice to obtain pretreated sea pumice;

soaking the pretreated sea pumice in an organic acid solution for 27 to 37 hours to obtain acid-modified sea pumice;

Shaking the acid-modified sea pumice at 20-30°C, washing and drying the shaken sea pumice to obtain the modified sea pumice;

Wherein, the mesh number of the modified sea pumice is 40-220 mesh.
The preparation method according to claim 5, characterized in that, "the modified dolomite, the modified calcite, the modified hydrozinsite, the modified zeolite and the modified According to the pre-set method, the sea pumice is mixed with activated carbon and binder to obtain the mixture" The steps specifically include:

Mixing the weighed modified dolomite, the modified calcite, the modified hydrozincite, the modified zeolite and the modified sea pumice to obtain a mineralized filter material;

The mineralized filter material, the activated carbon and the binder are uniformly mixed to obtain the mixed material.
The preparation method according to claim 5, characterized in that, "the modified dolomite, the modified calcite, the modified hydrozinsite, the modified zeolite and the modified According to the pre-set method, the sea pumice is mixed with activated carbon and binder to obtain the mixture" The steps specifically include:

The modified dolomite, the modified calcite, the modified hydrozinsite, the modified zeolite and the modified sea pumice obtained by weighing are sequentially mixed with the Activated carbon is mixed with the binder to obtain the mixture.
The preparation method according to claim 5, characterized in that, the step of "putting the mixture into a grinding tool for sintering to obtain a mineralized filter element" specifically includes:

The mixture is put into a grinding tool, sintered at 100-160°C for 20-60min, the sintering pressure is 12-18MPa, and the mineralized filter element is obtained after cooling.