Water for simulation test of reverse osmosis water purifier as well as preparation method and application of water

Abstract

The invention relates to water for simulation test of a reverse osmosis water purifier and a preparation method and application thereof, in particular to the technical field of water detection, and the water for simulation test of the reverse osmosis water purifier comprises 0.16-0.17 mL / L of aluminum-containing colloid, 0.16-0.17 mg / L of water-containing aluminosilicate, 0.6-0.7 mg / L of alkali, 0.15-0.16 mg / L of humic acid and 5-5.5 mg / L of aluminum salt. According to the simulation test water for the reverse osmosis water purifier, the components in the simulation test water are reasonably configured, and the synergistic effect of the components is utilized, so that a flow attenuation curve for testing a reverse osmosis membrane can be well simulated, and the performance of the reverse osmosis water purifier is favorably tested.

Description

Technical Field

[0001] The present invention relates to the technical field of water detection, and in particular to water for simulating testing of a reverse osmosis water purifier, a preparation method thereof and uses thereof. Background Art

[0002] At present, reverse osmosis water purifiers are indispensable water purification equipment in household appliances. It is usually necessary to test the hardness, alkalinity, TDS, pH, etc. of the water purifier to ensure that it meets the use requirements, thereby adjusting the hardness, alkalinity, TDS, pH, etc. of the simulated water.

[0003] CN103877862A discloses a simulated tap water and its use. The simulated tap water is composed of polyvinyl pyrrolidone PVP, nano silicon dioxide particles, nano iron oxide particles, sodium humate, sodium alginate, NaHCO3, MgSO4 and CaCl2. The simulated tap water test solution provided by the scheme fills the gap in water quality evaluation methods, establishes a standard test solution, improves the evaluation method of water purification membranes and water supply membranes, and avoids the difference in membrane evaluation results caused by the uneven quality of tap water in various places.

[0004] CN112645389A discloses a mixed colloid for simulating colloids in tap water, and its preparation method and application. The mixed colloid includes ferric hydroxide colloid, aluminum hydroxide colloid and silicate colloid in a molar concentration ratio of (1-3):(0.5-1.5):(0.5-1.5). The scheme adopts a mixed colloid including ferric hydroxide colloid, aluminum hydroxide colloid and silicate colloid, and the three colloids are indispensable, and a specific molar concentration ratio range is controlled to simulate the colloids in tap water. It is proved by verification that the mixed colloid has a high similarity with the colloid in tap water, and the simulated water prepared by the mixed colloid has a similarity of more than 90% with the local tap water in terms of the effect on the water purifier.

[0005] However, there is currently no simulated water for the simultaneous presence of substances such as colloids and organic matter. As a result, when the reverse osmosis water purifier is tested, when colloids and organic matter are present in the water, the water is quite different from the actual tap water, resulting in the test results being different from actual usage. Summary of the invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a reverse osmosis water purifier simulated test water and its preparation method and use, so as to solve the problem that when the current reverse osmosis water purifier is tested, when colloids and organic matter exist in the water liquid, it is quite different from the actual tap water, resulting in the test results being different from the actual usage.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a reverse osmosis water purifier simulation test water, wherein the reverse osmosis water purifier simulation test water comprises the following raw materials based on 1L of water:

[0009] Contains 0.16-0.17 mL of aluminum colloid, 0.16-0.17 mg of hydrated aluminum silicate, 0.6-0.7 mg of alkali, 0.15-0.16 mg of humic acid and 5-5.5 mg of aluminum salt.

[0010] The reverse osmosis water purifier simulation test water provided by the present invention achieves good simulation effect when the flow attenuation curve of the reverse osmosis membrane is tested using the colloid and organic water samples provided by the present invention through reasonable configuration of the various components in the simulated test water and utilizing the synergistic effect between the various components, which is beneficial to the performance testing of the reverse osmosis water purifier.

[0011] As a preferred technical solution of the present invention, the aluminum-containing colloid comprises: mixing an aluminum-containing solution and ammonia water, followed by stirring, aging and solid-liquid separation to obtain the colloid.

[0012] As a preferred technical solution of the present invention, the concentration of the aluminum-containing solution is 0.08-0.09 g / mL.

[0013] Preferably, the mass concentration of the ammonia water is 3.5-3.8%.

[0014] As a preferred technical solution of the present invention, the volume ratio of the aluminum solution to the ammonia water in the mixture is 1:(0.6-0.8).

[0015] Preferably, the pH value of the material is controlled to be 5-6 after mixing.

[0016] As a preferred technical solution of the present invention, the aging temperature is 70-80°C.

[0017] Preferably, the ripening time is 12-24 hours.

[0018] As a preferred technical solution of the present invention, the hydrated aluminum silicate includes montmorillonite.

[0019] As a preferred technical solution of the present invention, the alkali includes sodium hydroxide and / or potassium hydroxide.

[0020] As a preferred technical solution of the present invention, the aluminum salt includes aluminum sulfate.

[0021] In a second aspect, the present invention provides a method for preparing water for a reverse osmosis water purifier simulation test as described in the first aspect, the preparation method comprising:

[0022] The ingredients are prepared according to the raw material formula and then mixed to obtain water for the reverse osmosis water purifier simulation test.

[0023] In a third aspect, the present invention provides a use of the reverse osmosis water purifier simulated test water as described in the first aspect, the use comprising: using the reverse osmosis water purifier simulated test water to test the flow attenuation curve of the reverse osmosis membrane.

[0024] Compared with the prior art solutions, the present invention has the following beneficial effects:

[0025] The simulated water provided by the present invention is mainly ionic substances for testing existing reverse osmosis water purifiers, and the simulated water does not contain colloids, organic matter and other substances. It is quite different from actual tap water, and the test results are different from actual usage. The present invention adopts a new simulated water formula to provide simulated water with colloids and organic matter, so that the test water is closer to the actual tap water in use, and a good simulation of the flow attenuation curve is achieved, so that the test results are more accurate. DETAILED DESCRIPTION

[0026] To better illustrate the present invention and facilitate understanding of the technical solution of the present invention, typical but non-limiting embodiments of the present invention are as follows:

[0027] This specific embodiment provides a reverse osmosis water purifier simulation test water, especially a reverse osmosis water purifier simulation test water for colloids and organic matter, which includes the following raw materials based on 1L of water:

[0028] Contains 0.16-0.17 mL of aluminum colloid, 0.16-0.17 mg of hydrated aluminum silicate, 0.6-0.7 mg of alkali, 0.15-0.16 mg of humic acid and 5-5.5 mg of aluminum salt.

[0029] In the present invention, the amount of aluminum colloid in the simulated test water of the reverse osmosis water purifier is 0.16-0.17mL based on 1L of water, for example, it can be 0.16mL, 0.161mL, 0.162mL, 0.163mL, 0.164mL, 0.165mL, 0.166mL, 0.167mL, 0.168mL, 0.169mL or 0.17mL, but is not limited to the listed values, and other values ​​not listed within the range also meet the requirements.

[0030] In the present invention, the amount of hydrated aluminum silicate in the simulated test water of the reverse osmosis water purifier is 0.16-0.17 mg based on 1L of water, for example, it can be 0.16 mg, 0.161 mg, 0.162 mg, 0.163 mg, 0.164 mg, 0.165 mg, 0.166 mg, 0.167 mg, 0.168 mg, 0.169 mg or 0.17 mg, etc., but is not limited to the listed values, and other values ​​not listed within the range also meet the requirements.

[0031] In the present invention, the amount of alkali used in the simulated test water of the reverse osmosis water purifier is 0.6-0.7 mg based on 1L of water, for example, it can be 0.6 mg, 0.61 mg, 0.62 mg, 0.63 mg, 0.64 mg, 0.65 mg, 0.66 mg, 0.67 mg, 0.68 mg, 0.69 mg or 0.7 mg, etc., but is not limited to the listed values, and other values ​​not listed within the range also meet the requirements.

[0032] In the present invention, the amount of humic acid in the simulated test water of the reverse osmosis water purifier is 0.15-0.16 mg based on 1L of water, for example, it can be 0.15 mg, 0.151 mg, 0.152 mg, 0.153 mg, 0.154 mg, 0.155 mg, 0.156 mg, 0.157 mg, 0.158 mg, 0.159 mg or 0.16 mg, etc., but is not limited to the listed values, and other values ​​not listed within the range also meet the requirements.

[0033] In the present invention, the amount of aluminum salt used in the simulated test water of the reverse osmosis water purifier is 5-5.5 mg based on 1L of water, for example, it can be 5 mg, 5.05 mg, 5.1 mg, 5.15 mg, 5.2 mg, 5.25 mg, 5.3 mg, 5.35 mg, 5.4 mg, 5.45 mg or 5.5 mg, etc., but is not limited to the listed values, and other values ​​not listed within the range also meet the requirements.

[0034] In the present invention, the raw materials limited by 1L of water do not exclude the configuration schemes of 0.1L of water, 0.2L of water, 0.3L of water, 0.5L of water, 0.8L of water, 2L of water, 3L of water or 5L of water. When the simulated test water is configured for 1L of water, the amount of raw materials used in 1L of water can be reduced or increased proportionally.

[0035] The aluminum-containing colloid is obtained by mixing an aluminum-containing solution and ammonia water, followed by stirring, aging and solid-liquid separation.

[0036] Wherein, the concentration of the aluminum-containing solution is 0.08-0.09 g / mL, for example, it can be 0.08 g / mL, 0.081 g / mL, 0.082 g / mL, 0.083 g / mL, 0.084 g / mL, 0.085 g / mL, 0.086 g / mL, 0.087 g / mL, 0.088 g / mL, 0.089 g / mL or 0.09 g / mL, but is not limited to the listed values, and other unlisted values ​​within the range also meet the requirements.

[0037] In the present invention, the aluminum-containing solution is obtained by mixing solutes such as aluminum sulfate, aluminum chloride, aluminum nitrate and the like with water.

[0038] Among them, the mass concentration of the ammonia water is 3.5-3.8%, for example, it can be 3.5%, 3.52%, 3.54%, 3.56%, 3.58%, 3.6%, 3.62%, 3.64%, 3.66%, 3.68%, 3.7%, 3.72%, 3.74%, 3.76%, 3.78% or 3.8%, etc., but is not limited to the listed values, and other unlisted values ​​within the range also meet the requirements.

[0039] Wherein, the volume ratio of the aluminum solution and the ammonia water in the mixture is 1:(0.6-0.8), for example, it can be 1:0.6, 1:0.62, 1:0.64, 1:0.66, 1:0.68, 1:0.7, 1:0.72, 1:0.74, 1:0.76, 1:0.78 or 1:0.8, but is not limited to the listed values, and other unlisted values ​​within the range also meet the requirements.

[0040] Among them, the pH value of the material after mixing is controlled to be 5-6, for example, it can be 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9 or 6, but is not limited to the listed values, and other values ​​not listed in this range also meet the requirements.

[0041] The aging temperature is 70-80°C, for example, 70°C, 71°C, 72°C, 73°C, 74°C, 75°C, 76°C, 77°C, 78°C, 79°C or 80°C, but is not limited to the listed values, and other values ​​not listed within the range also meet the requirements.

[0042] The aging time is 12-24 hours, for example, it can be 12 hours, 13 hours, 14 hours, 15 hours, 16 hours, 17 hours, 18 hours, 19 hours, 20 hours, 21 hours, 22 hours, 23 hours or 24 hours, but is not limited to the listed values, and other values ​​not listed within the range also meet the requirements.

[0043] Wherein, the hydrous aluminum silicate includes montmorillonite.

[0044] Wherein, the alkali includes sodium hydroxide and / or potassium hydroxide.

[0045] Wherein, the molecular weight of the humic acid is 2000-5000.

[0046] Wherein, the aluminum salt includes aluminum sulfate.

[0047] Furthermore, the present invention provides a method for preparing the water for the reverse osmosis water purifier simulation test, the preparation method comprising:

[0048] The ingredients are prepared according to the raw material formula and then mixed to obtain water for the reverse osmosis water purifier simulation test.

[0049] Exemplarily, according to the formula, humic acid and alkali are dissolved in water to prepare a humic acid stock solution, and hydrated aluminosilicate is dissolved in water to prepare a hydrated aluminosilicate stock solution. Then, the humic acid stock solution, the hydrated aluminosilicate stock solution, the aluminum-containing colloid and the aluminum salt are mixed with water to obtain water for the reverse osmosis water purifier simulation test.

[0050] Furthermore, the present invention provides a use of the aforementioned reverse osmosis water purifier simulated test water, the use comprising: using the reverse osmosis water purifier simulated test water to test the flow attenuation curve of the reverse osmosis membrane.

[0051] Further, in order to illustrate the good simulation test effect that can be achieved by providing the reverse osmosis water purifier simulation test water provided by the present invention, an actual example is used for illustration, as follows:

[0052] Example 1

[0053] This embodiment provides a reverse osmosis water purifier simulation test water, and the reverse osmosis water purifier simulation test water includes the following raw materials based on 1L of water:

[0054] Contains 0.164 mL of aluminum colloid, 0.168 mg of hydrous aluminum silicate, 0.65 mg of alkali, 0.154 mg of humic acid (molecular weight 3500) and 5.2 mg of aluminum salt;

[0055] The aluminum-containing colloid comprises: mixing an aluminum sulfate solution with a concentration of 0.084 g / mL and an ammonia solution with a mass concentration of 3.6% in a volume ratio of 1:0.7, controlling the pH value of the material to be 5.8 after mixing, and then stirring, aging at 75° C. for 15 hours, and separating the solid from the liquid to obtain the aluminum colloid;

[0056] The hydrous aluminum silicate is montmorillonite;

[0057] The alkali is sodium hydroxide;

[0058] The aluminum salt is aluminum sulfate.

[0059] The preparation process is to prepare the ingredients according to the raw material formula and then mix them. Specifically, humic acid and alkali are dissolved in water to prepare humic acid stock solution, and hydrated aluminosilicate is dissolved in water to prepare hydrated aluminosilicate stock solution. Then, the humic acid stock solution, the hydrated aluminosilicate stock solution, the aluminum-containing colloid and the aluminum salt are mixed with water to obtain water for the reverse osmosis water purifier simulation test.

[0060] Example 2

[0061] This embodiment provides a reverse osmosis water purifier simulation test water, and the reverse osmosis water purifier simulation test water includes the following raw materials based on 1L of water:

[0062] Contains 0.168 mL of aluminum colloid, 0.164 mg of hydrous aluminum silicate, 0.68 mg of alkali, 0.157 mg of humic acid (molecular weight 4000) and 5.4 mg of aluminum salt;

[0063] The aluminum-containing colloid comprises: mixing an aluminum nitrate solution with a concentration of 0.086 g / mL and an ammonia solution with a mass concentration of 3.7% in a volume ratio of 1:0.75, controlling the pH value of the material to be 5.5 after mixing, and then stirring, aging at 75° C. for 12 hours, and separating the solid from the liquid to obtain the aluminum colloid;

[0064] The hydrous aluminum silicate is montmorillonite;

[0065] The base is potassium hydroxide;

[0066] The aluminum salt is aluminum sulfate.

[0067] The preparation process is to prepare the ingredients according to the raw material formula and then mix them. Specifically, humic acid and alkali are dissolved in water to prepare humic acid stock solution, and hydrated aluminosilicate is dissolved in water to prepare hydrated aluminosilicate stock solution. Then, the humic acid stock solution, the hydrated aluminosilicate stock solution, the aluminum-containing colloid and the aluminum salt are mixed with water to obtain water for the reverse osmosis water purifier simulation test.

[0068] Example 3

[0069] This embodiment provides a reverse osmosis water purifier simulation test water, and the reverse osmosis water purifier simulation test water includes the following raw materials based on 1L of water:

[0070] Contains 0.17 mL of aluminum colloid, 0.16 mg of hydrous aluminum silicate, 0.7 mg of alkali, 0.16 mg of humic acid (molecular weight 2000), and 5.5 mg of aluminum salt;

[0071] The aluminum-containing colloid comprises: mixing an aluminum nitrate solution with a concentration of 0.09 g / mL and an ammonia solution with a mass concentration of 3.5% in a volume ratio of 1:0.8, controlling the pH value of the material to be 5 after mixing, and then stirring, aging at 70° C. for 24 hours, and separating the solid from the liquid to obtain the aluminum colloid;

[0072] The hydrous aluminum silicate is montmorillonite;

[0073] The alkali is sodium hydroxide;

[0074] The aluminum salt is aluminum sulfate.

[0075] The preparation process is to prepare the ingredients according to the raw material formula and then mix them. Specifically, humic acid and alkali are dissolved in water to prepare humic acid stock solution, and hydrated aluminosilicate is dissolved in water to prepare hydrated aluminosilicate stock solution. Then, the humic acid stock solution, the hydrated aluminosilicate stock solution, the aluminum-containing colloid and the aluminum salt are mixed with water to obtain water for the reverse osmosis water purifier simulation test.

[0076] Comparative Example 1

[0077] The only difference from Example 1 is that the aluminum-containing colloid is replaced by an equal amount of silicate colloid.

[0078] Comparative Example 2

[0079] The only difference from Example 1 is that montmorillonite is replaced by an equal amount of sodium aluminosilicate.

[0080] Comparative Example 3

[0081] The only difference from Example 1 is that the aluminum salt is replaced by an equal amount of sodium silicate.

[0082] The simulated water obtained in Examples 1-3 and Comparative Examples 1-3 was subjected to a flow attenuation test of a reverse osmosis membrane and compared with tap water. The results are shown in Table 1 below.

[0083] Table 1

[0084]

[0085]

[0086] It can be seen from Table 1 that the attenuation curve of the simulated water provided in Examples 1-3 of the present invention is very close to that of tap water, indicating that the simulated water provided by the present invention is closer to actual tap water and can effectively test the actual performance of the filter element. The simulated test water used in Comparative Examples 1-3 attenuates more slowly than tap water, and its test effect is obviously inferior to that of the present invention.

[0087] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0088] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0089] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A reverse osmosis water purifier simulation test water, characterized in that: The reverse osmosis water purifier simulation test water includes the following raw materials based on 1L of water: Contains 0.16-0.17 mL of aluminum colloid, 0.16-0.17 mg of hydrated aluminum silicate, 0.6-0.7 mg of alkali, 0.15-0.16 mg of humic acid and 5-5.5 mg of aluminum salt.

2. The reverse osmosis water purifier simulation test water according to claim 1, characterized in that: The aluminum-containing colloid is obtained by mixing an aluminum-containing solution and ammonia water, followed by stirring, aging and solid-liquid separation.

3. The reverse osmosis water purifier simulation test water according to claim 2, characterized in that: The concentration of the aluminum-containing solution is 0.08-0.09 g / mL; And / or, the mass concentration of the ammonia water is 3.5-3.8%.

4. The reverse osmosis water purifier simulation test water according to claim 2, characterized in that: The volume ratio of the aluminum solution to the ammonia water in the mixture is 1:(0.6-0.8); And / or, after the mixing, the pH value of the material is controlled to be 5-6.

5. The reverse osmosis water purifier simulation test water according to claim 2, characterized in that: The aging temperature is 70-80°C; And / or, the ripening time is 12-24 hours.

6. The reverse osmosis water purifier simulation test water according to claim 1, characterized in that: The hydrous aluminosilicate includes montmorillonite.

7. The reverse osmosis water purifier simulation test water according to claim 1, characterized in that: The base includes sodium hydroxide and / or potassium hydroxide.

8. The reverse osmosis water purifier simulation test water according to claim 1, characterized in that: The aluminum salt includes aluminum sulfate.

9. A method for preparing simulated test water for a reverse osmosis water purifier according to any one of claims 1 to 8, characterized in that: The preparation method comprises: The ingredients are prepared according to the raw material formula and then mixed to obtain water for the reverse osmosis water purifier simulation test.

10. A use of the reverse osmosis water purifier simulation test water according to any one of claims 1 to 8, characterized in that: The use includes: using the reverse osmosis water purifier to simulate the test water to test the flow attenuation curve of the reverse osmosis membrane.

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