A multi-effect phosphorus-free boiler water conditioning agent and a preparation method thereof

Abstract

The present application relates to the technical field of boiler water treatment, and particularly provides a multi-effect phosphorus-free boiler water conditioner and a preparation method thereof. The preparation steps of the multi-effect phosphorus-free boiler water conditioner include: preparing a carrier, combining and loading, preparing a coating, and mixing and coating. The multi-effect phosphorus-free boiler water conditioner and the preparation method thereof have the effects of scale inhibition, corrosion inhibition and oxidation resistance, zero phosphate addition, long-term effectiveness, and no need for frequent addition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler water treatment, in particular to a multi-effect phosphorus-free boiler water conditioner and a preparation method thereof. BACKGROUND

[0002] With the rapid development of economic construction, boilers are increasingly used. As special equipment, boilers are high-energy equipment that provide hot water, steam and other heat energy. Therefore, the conditioning and treatment of boiler water is very important. Most existing boiler water conditioners are phosphate-based formulations, usually using orthophosphate, pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate, etc. However, the environmental problems caused by high phosphorus content in sewage exacerbate the burden of sewage treatment, making it difficult to continue using phosphorus-containing boiler water conditioners. Although there are bio-based boiler conditioners, they have a short action time and need to be added frequently, which is inconvenient for industrial use and can easily cause water eutrophication due to high organic content, which is not conducive to popularization.

[0003] Therefore, it is necessary to develop a multi-effect phosphorus-free boiler conditioner that can prevent scale for a long time. SUMMARY

[0004] To solve the above problems, the purpose of the present application is to provide a multi-effect phosphorus-free boiler water conditioner and a preparation method thereof.

[0005] In one aspect, the present application provides a preparation method of a multi-effect phosphorus-free boiler water conditioner, which is as follows:

[0006] Step one: prepare the carrier: take UiO-66-NH2, activate it in a vacuum dryer at a vacuum degree of 130 Pa and a temperature of 120℃ for 6h to obtain the carrier;

[0007] Step two: combine and load: dissolve PESA in pure water to prepare a 14% mass concentration PESA solution, immerse the carrier in 10 times the mass of the carrier PESA solution, treat it with 300W 40KHz ultrasound for 30 min, then stir it at 78℃ for 15h, and finally dry it in a vacuum dryer at a vacuum degree of 130 Pa and a temperature of 90℃ to remove water to obtain a MOFs composite;

[0008] Step three: prepare the paint: mix 20-27% by mass of mussel myoepithelial protein, 7-11% by mass of 80μm particle size sponge iron, 0.2-0.6% by mass of antioxidant Irganox1010, 0.3-0.8% by mass of dispersant Pluronic F-127, and the balance of pure water to obtain the paint;

[0009] Step four: mixing coating: the MOFs compound is mixed with the coating with the mass of 1.8 times of the MOFs compound, and is dried in a vacuum drying machine with the vacuum degree of 100 Pa and the temperature of 110 DEG C to obtain the multi-effect phosphorus-free boiler water regulator.

[0010] Further, the mass fraction of the mussel mucin is 23%.

[0011] Further, the mass fraction of the sponge iron is 9%.

[0012] Further, the mass fraction of the antioxidant Irganox1010 is 0.4%.

[0013] Further, the mass fraction of the dispersant Pluronic F-127 is 0.5%.

[0014] In another aspect, the application provides a multi-effect phosphorus-free boiler water regulator prepared by the preparation method of the multi-effect phosphorus-free boiler water regulator.

[0015] The application can bring the following beneficial effects:

[0016] The multi-effect phosphorus-free boiler water regulator and the preparation method thereof have the effects of scale inhibition, corrosion inhibition and oxidation resistance, zero phosphate addition and long-term effectiveness, and do not need frequent addition.

[0017] The possible principle is as follows: the application uses zirconium-based MOFs UiO-66-NH2 as a porous carrier to activate and load polyepoxysuccinic acid PESA to inhibit scale and corrosion, and also as an inner carrier for slow release, sponge iron is used to react with oxygen, and mussel mucin is used to coat the MOFs compound-sponge iron system to form an outer slow release, and the antioxidant Irganox1010 and the dispersant Pluronic F-127 are used to stabilize the system and prolong the failure time of the mussel mucin; with the operation of the boiler, the mussel mucin gradually peels off and fails, the sponge iron gradually reacts with oxygen, and the UiO-66-NH2 also gradually releases PESA to inhibit scale and corrosion, and finally achieves the effects of long-acting scale inhibition, corrosion inhibition and oxidation resistance.

[0018] The above conditions jointly act and cannot be omitted, and the parameters in the application have contingency, and finally achieve the effect of green low-phosphorus scale inhibition. DETAILED DESCRIPTION

[0019] For the purpose of illustrating the inventive concept more clearly, the detailed description of the application will be made with examples; in the following description, numerous specific details are set forth in order to provide a more thorough understanding of the application; however, it will be apparent to one skilled in the art that the application can be practiced without one or more of these specific details; in other instances, well-known features have not been described in detail to avoid obscuring the application.

[0020] In the present application, the boiler uses a volume of 0.5 tons, the maximum pressure is 1.25 MPa, and after the first test, it is cleaned and enters the next experiment; the particle size of UiO-66-NH2 is about 500 nm, the CAS is 1260119-00-3; the CAS of PESA is 109578-44-1; the mussel mucin is a 200-mesh solid powder; the sponge iron is crushed and sieved to the desired size; the CAS of Pluronic F-127 is 9003-11-6.

[0021] Unless otherwise specified, the raw material components in the following examples can be purchased through commercial channels, and the experimental instruments used are laboratory conventional experimental instruments, and the performance test method is a known test method in the art. The overall operating space environment is 25°C, and the air humidity is 30%.

[0022] The preferred embodiments are as follows:

[0023] Example 1:

[0024] The following method is used to prepare a multi-effect phosphorus-free boiler water conditioner:

[0025] Step one: prepare the carrier: take UiO-66-NH2, activate it in a vacuum drying machine at a vacuum degree of 130 Pa and a temperature of 120°C for 6h to obtain the carrier;

[0026] Step two: combine and load: dissolve PESA in pure water to prepare a 14% mass concentration PESA solution, immerse the carrier in 10 times the mass of the carrier PESA solution, treat it with 300W 40KHz ultrasonic for 30 min, then stir it at 78°C for 15h, and finally dry it in a vacuum drying machine at a vacuum degree of 130 Pa and a temperature of 90°C to remove water to obtain a MOFs composite;

[0027] Step three: prepare the coating: mix 23% by mass of mussel mucin, 9% by mass of 80μm particle size sponge iron, 0.4% by mass of antioxidant Irganox1010, 0.5% by mass of dispersant Pluronic F-127, and the balance of pure water to obtain the coating;

[0028] Step four: mixing coating: the MOFs compound is mixed with the coating with the mass of 1.8 times of the MOFs compound, and is dried in a vacuum drying machine with the vacuum degree of 100 Pa and the temperature of 110 ℃ to remove water to obtain the multi-effect phosphorus-free boiler water regulator.

[0029] Examples 2~9:

[0030] Example 2 is different from Example 1 only in that the mass fraction of mussel mucin is 20%;

[0031] Example 3 is different from Example 1 only in that the mass fraction of mussel mucin is 27%;

[0032] Example 4 is different from Example 1 only in that the mass fraction of sponge iron is 7%;

[0033] Example 5 is different from Example 1 only in that the mass fraction of sponge iron is 11%;

[0034] Example 6 is different from Example 1 only in that the mass fraction of antioxidant Irganox1010 is 0.2%;

[0035] Example 7 is different from Example 1 only in that the mass fraction of antioxidant Irganox1010 is 0.6%;

[0036] Example 8 is different from Example 1 only in that the mass fraction of dispersant Pluronic F-127 is 0.3%;

[0037] Example 9 is different from Example 1 only in that the mass fraction of dispersant Pluronic F-127 is 0.8%.

[0038] Comparative Examples 1~17:

[0039] Comparative Example 1 is different from Example 1 only in that the mass fraction of mussel mucin is 10%;

[0040] Comparative Example 2 is different from Example 1 only in that the mass fraction of mussel mucin is 40%;

[0041] Comparative Example 3 is different from Example 1 only in that the mass fraction of sponge iron is 3%;

[0042] Comparative Example 4 is different from Example 1 only in that the mass fraction of sponge iron is 20%;

[0043] Comparative Example 5 is different from Example 1 only in that the mass fraction of antioxidant Irganox1010 is 0.1%;

[0044] Comparative Example 6 differs from Example 1 only in that the mass fraction of antioxidant Irganox 1010 is 1.0%;

[0045] Comparative Example 7 differs from Example 1 only in that the mass fraction of dispersant Pluronic F-127 is 0.1%;

[0046] Comparative Example 8 differs from Example 1 only in that the mass fraction of dispersant Pluronic F-127 is 1.5%;

[0047] Comparative Example 9 differs from Example 1 only in that a 5% mass concentration PESA solution is prepared;

[0048] Comparative Example 10 differs from Example 1 only in that a 30% mass concentration PESA solution is prepared;

[0049] Comparative Example 11 differs from Example 1 only in that 100W 40KHz ultrasonic treatment is used;

[0050] Comparative Example 12 differs from Example 1 only in that 600W 40KHz ultrasonic treatment is used;

[0051] Comparative Example 13 differs from Example 1 only in that stirring is carried out at 60°C for 15h;

[0052] Comparative Example 14 differs from Example 1 only in that stirring is carried out at 100°C for 15h;

[0053] Comparative Example 15 differs from Example 1 only in that the particle size of the sponge iron is 30μm;

[0054] Comparative Example 16 differs from Example 1 only in that the particle size of the sponge iron is 200μm;

[0055] Comparative Example 17 differs from Example 1 only in that mussel mucin is replaced by sponge iron, antioxidant Irganox 1010 and dispersant Pluronic F-127 in the same mass ratio as in Example 1;

[0056] Blank group: the blank group does not use the multi-effect phosphorus-free boiler water conditioner and is directly operated at 120°C.

[0057] Prepare 16MnR type thick and long clean steel plates with a width of 0.5 cm, a length of 25 cm and a thickness of 10 cm corresponding to the number of each example, and suspend one of the above clean steel plates in the middle and lower part of the boiler of each example, and run it at 120 DEG C for 110 days; the operation is as follows: inject water at 0.7 times the maximum water level of the boiler, the initial dissolved oxygen of the injected water is 4.41 mg / L, and inject 0.3 times the mass of the multi-effect phosphorus-free boiler water conditioner, the running pipeline is a 15 m long steam output pipeline, and the steam is connected to a small cooler for condensation, and then returned to the boiler through a 15 m long condensate return pipeline.

[0058] Take out each steel plate, weigh and calculate the reduced mass of the steel plate after washing and drying as the corrosion prevention effect, in g, and take the last three digits after the decimal point; collect, weigh and calculate the mass of the scale on the inner wall of each boiler as the scale inhibition effect, in g, and take the last one digit after the decimal point; after the calibration of the dissolved oxygen instrument, immerse the electrode in the measured water sample at the boiler drain outlet to measure the dissolved oxygen as the oxidation resistance effect, control the water flow rate to be about 0.3 m / s, in mg / L, and take the last two digits after the decimal point. The results of the test are shown in Table 1.

[0059]

[0060] As can be seen from the data in Table 1, compared with other examples, the scale amount of the embodiment of the application, especially the scheme of example 1 of the application, is less, and the steel plate reduction amount and the dissolved oxygen amount are smaller; the multi-effect phosphorus-free boiler water conditioner and the preparation method thereof of the embodiment of the application, especially example 1 of the application, have good scale inhibition effect, and good corrosion resistance and oxidation resistance effect without using phosphate materials.

[0061] The above only describes the embodiments of the application and is not used to limit the application; the application can have various changes and variations for those skilled in the art; any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application shall be included in the scope of the claims of the application.

Claims

1. A method for preparing a multi-effect phosphorus-free boiler water conditioner, characterized in that, The preparation method of the multi-effect phosphorus-free boiler water conditioner is as follows: Step 1: Prepare the support: Take UiO-66-NH2 and activate it in a vacuum dryer at a vacuum degree of 130Pa and a temperature of 120℃ for 6 hours to obtain the support; Step 2: Loading: Dissolve PESA in pure water to prepare a 14% (w / w) PESA solution. Immerse the carrier in the PESA solution with 10 times the mass of the carrier. After ultrasonic treatment at 300W 40KHz for 30 min, stir at 78℃ for 15 h and then dry in a vacuum dryer at 90℃ under a vacuum of 130Pa to remove water and obtain the MOFs complex. Step 3: Prepare the coating: Mix 20-27% mussel adhesive protein, 7-11% sponge iron with a particle size of 80μm, 0.2-0.6% antioxidant Irganox 1010, 0.3-0.8% dispersant Pluronic F-127, and make up the balance with pure water until homogeneous to obtain the coating. Step 4: Mixing and Coating: Mix the MOFs composite with the coating material in a mass of 1.8 times that of the MOFs composite, and dry the mixture in a vacuum dryer at a vacuum degree of 100 Pa and a temperature of 110 °C to remove water, thereby obtaining the multi-effect phosphorus-free boiler water conditioner.

2. The preparation method of the multi-effect phosphorus-free boiler water conditioner according to claim 1, characterized in that, The mussel adhesive protein has a mass fraction of 23%.

3. The preparation method of the multi-effect phosphorus-free boiler water conditioner according to claim 1, characterized in that, The mass fraction of the sponge iron is 9%.

4. The preparation method of the multi-effect phosphorus-free boiler water conditioner according to claim 1, characterized in that, The antioxidant Irganox1010 has a mass fraction of 0.4%.

5. The preparation method of the multi-effect phosphorus-free boiler water conditioner according to claim 1, characterized in that, The mass fraction of the dispersant Pluronic F-127 is 0.5%.

6. A multi-effect phosphorus-free boiler water conditioner prepared by a method for preparing a multi-effect phosphorus-free boiler water conditioner as described in any one of claims 1 to 5.

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