Slow-release phosphate glass particles and preparation method thereof

Abstract

The invention discloses slow-release phosphate glass particles and a preparation method thereof, wherein the slow-release phosphate glass particles comprise the following components: sodium dihydrogen phosphate or / and aluminum dihydrogen phosphate, sodium carbonate, calcium carbonate, silicon dioxide, glass fibers or / and ceramic fibers. The preparation method comprises the steps: uniformly mixing sodium dihydrogen phosphate or / and aluminum dihydrogen phosphate, sodium carbonate, calcium carbonate, silicon dioxide and the glass fibers or / and the ceramic fibers in proportion; and granulating the uniformly mixed raw materials, drying, calcining at high temperature, and cooling to obtain the slow-release phosphate glass particles. The product provided by the invention is relatively uniform in particle, relatively small in water resistance in the filtering process, not easy to disintegrate, long in service life and low in production cost.

Description

technical field

[0001] The invention mainly relates to the technical field of slow-release scale inhibition, in particular to a slow-release phosphate glass particle and a preparation method thereof. Background technique

[0002] Because the water contains calcium and magnesium plasma, scale will be formed during use, especially in the field of water heaters, since water needs to be heated during use, scale is more likely to form. In order to prevent water scaling, it is usually necessary to treat the water with antiscalants. In order to prolong the service time of the antiscalant, the antiscalant is usually prepared into block or granular form together with other components in the prior art.

[0003] The antiscalant of prior art has the following problems:

[0004] 1. There are usually irregular scale inhibitor particles, which are screened with a uniform mesh number, resulting in a lot of waste. At the same time, irregular scale inhibitor particles have relatively large ...

Examples

Embodiment 1

[0045] A slow-release phosphate glass particle, comprising the following raw materials in parts by weight: 60 parts of sodium dihydrogen phosphate, 20 parts of sodium carbonate, 20 parts of calcium carbonate, 8 parts of silicon dioxide, and 2 parts of alumina fiber.

[0046] The preparation method of the above-mentioned sustained-release phosphate glass granules comprises the following steps:

[0047] 1), mix 60 parts of sodium dihydrogen phosphate, 20 parts of sodium carbonate, 20 parts of calcium carbonate, 8 parts of silicon dioxide, and 2 parts of alumina fiber;

[0048] 2) Add the uniformly mixed raw materials in step 1) to the disc granulator at a speed of 2kg / min, the working speed of the disc granulator is 40r / min, and prepare granules with a diameter of 1-10mm , the spray liquid is 0.2% polyvinyl alcohol aqueous solution with a spray speed of 0.5L / min;

[0049] 3) drying the granules prepared in step 2) at a temperature of 50°C for 3 hours;

[0050] Put the dried pa...

Embodiment 2

[0053] A slow-release phosphate glass granule, in parts by weight, is made of the following components:

[0054] 60 parts of aluminum dihydrogen phosphate, 40 parts of sodium carbonate, 40 parts of calcium carbonate, 15 parts of silicon dioxide, and 5 parts of polycrystalline mullite fiber.

[0055] The preparation method of the above-mentioned sustained-release phosphate glass particles, except the raw material components and proportioning, the mass percent of the polyvinyl alcohol aqueous solution is 0.5%, and the rest are consistent with Example 1.

Embodiment 3

[0057] A slow-release phosphate glass granule, in parts by weight, is made of the following components:

[0058] 55 parts of sodium dihydrogen phosphate, 50 parts of sodium carbonate, 40 parts of calcium carbonate, 30 parts of silicon dioxide, 5 parts of zirconia fiber.

[0059] The preparation method of the above-mentioned sustained-release phosphate glass particles is consistent with Example 1 except for the raw material components and proportioning.

technical field

[0001] The invention mainly relates to the technical field of slow-release scale inhibition, in particular to a slow-release phosphate glass particle and a preparation method thereof. Background technique

[0002] Because the water contains calcium and magnesium plasma, scale will be formed during use, especially in the field of water heaters, since water needs to be heated during use, scale is more likely to form. In order to prevent water scaling, it is usually necessary to treat the water with antiscalants. In order to prolong the service time of the antiscalant, the antiscalant is usually prepared into block or granular form together with other components in the prior art.

[0003] The antiscalant of prior art has the following problems:

[0004] 1. There are usually irregular scale inhibitor particles, which are screened with a uniform mesh number, resulting in a lot of waste. At the same time, irregular scale inhibitor particles have relatively large ...

Examples

Embodiment 1

[0045] A slow-release phosphate glass particle, comprising the following raw materials in parts by weight: 60 parts of sodium dihydrogen phosphate, 20 parts of sodium carbonate, 20 parts of calcium carbonate, 8 parts of silicon dioxide, and 2 parts of alumina fiber.

[0046] The preparation method of the above-mentioned sustained-release phosphate glass granules comprises the following steps:

[0047] 1), mix 60 parts of sodium dihydrogen phosphate, 20 parts of sodium carbonate, 20 parts of calcium carbonate, 8 parts of silicon dioxide, and 2 parts of alumina fiber;

[0048] 2) Add the uniformly mixed raw materials in step 1) to the disc granulator at a speed of 2kg / min, the working speed of the disc granulator is 40r / min, and prepare granules with a diameter of 1-10mm , the spray liquid is 0.2% polyvinyl alcohol aqueous solution with a spray speed of 0.5L / min;

[0049] 3) drying the granules prepared in step 2) at a temperature of 50°C for 3 hours;

[0050] Put the dried pa...

Embodiment 2

[0053] A slow-release phosphate glass granule, in parts by weight, is made of the following components:

[0054] 60 parts of aluminum dihydrogen phosphate, 40 parts of sodium carbonate, 40 parts of calcium carbonate, 15 parts of silicon dioxide, and 5 parts of polycrystalline mullite fiber.

[0055] The preparation method of the above-mentioned sustained-release phosphate glass particles, except the raw material components and proportioning, the mass percent of the polyvinyl alcohol aqueous solution is 0.5%, and the rest are consistent with Example 1.

Embodiment 3

[0057] A slow-release phosphate glass granule, in parts by weight, is made of the following components:

[0058] 55 parts of sodium dihydrogen phosphate, 50 parts of sodium carbonate, 40 parts of calcium carbonate, 30 parts of silicon dioxide, 5 parts of zirconia fiber.

[0059] The preparation method of the above-mentioned sustained-release phosphate glass particles is consistent with Example 1 except for the raw material components and proportioning.

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