Multi-effect phosphorus-free boiler water regulator and preparation method thereof

Abstract

The invention relates to the technical field of boiler water treatment, and particularly provides a multi-effect phosphorus-free boiler water conditioning agent and a preparation method thereof, and the preparation method of the multi-effect phosphorus-free boiler water conditioning agent comprises the steps of carrier preparation, load combination, coating preparation and mixed coating. According to the multi-effect phosphorus-free boiler water conditioning agent and the preparation method thereof, the effects of scale inhibition, corrosion inhibition and oxidation resistance are considered, zero phosphate is added, the conditioning agent can be effective for a long time, and frequent addition is not needed.

Description

Technical Field

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

[0002] The use of boilers has increased with the rapid development of economic construction. As a special equipment, boilers are high-energy equipment that provides hot water, steam and other thermal energy. Therefore, the regulation and treatment of boiler water is very important. Most of the existing boiler water regulators are phosphate-based formulas, usually orthophosphate, pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate, etc. However, the environmental problems caused by the high phosphorus content in sewage have aggravated the burden of sewage treatment, making it difficult to continue to use phosphorus-containing boiler water regulators. Although there are bio-based boiler regulators, their action time is short and they need to be added more frequently. They are inconvenient in industrial use and the high content of organic matter discharged can easily cause eutrophication of water bodies, which is not conducive to promotion.

[0003] Therefore, it is necessary to develop a phosphate-free multi-effect boiler conditioner that can inhibit scale for a long time. Summary of the invention

[0004] In order to solve the above problems, the object of the present invention is to provide a multi-effect phosphorus-free boiler water conditioner and a preparation method thereof.

[0005] On the one hand, the present invention provides a method for preparing a multi-effect phosphorus-free boiler water conditioner, and the preparation method of the multi-effect phosphorus-free boiler water conditioner is as follows: Step 1: Prepare the carrier: Take UiO-66-NH2 and activate it in a vacuum dryer at a vacuum degree of 130Pa and a temperature of 120°C for 6h to obtain the carrier; Step 2: Combined loading: PESA was dissolved in pure water to prepare a 14% mass concentration PESA solution, the carrier was immersed in the PESA solution with a mass 10 times that of the carrier, 300W 40KHz ultrasonic treatment was performed for 30 min, and then stirred at 78°C for 15 h, and then dried in a vacuum dryer at a vacuum degree of 130Pa and a temperature of 90°C to remove water to obtain a MOFs composite; Step 3: preparing the coating: uniformly mixing 20-27% by mass of mussel mucin, 7-11% by mass of sponge iron with a particle size of 80 μm, 0.2-0.6% by mass of antioxidant Irganox 1010, 0.3-0.8% by mass of dispersant Pluronic F-127 and the balance of pure water to obtain the coating; Step 4: Mixing and coating: Evenly mix the MOFs complex with the coating whose mass is 1.8 times of the MOFs complex, dry and remove water in a vacuum dryer at a vacuum degree of 100 Pa and a temperature of 110° C. to obtain the multi-effect phosphorus-free boiler water conditioner.

[0006] Furthermore, the mass fraction of the mussel mucin is 23%.

[0007] Furthermore, the mass fraction of the sponge iron is 9%.

[0008] Furthermore, the mass fraction of the antioxidant Irganox1010 is 0.4%.

[0009] Furthermore, the mass fraction of the dispersant Pluronic F-127 is 0.5%.

[0010] On the other hand, the present application provides a multi-effect phosphorus-free boiler water conditioner prepared by the preparation method of the multi-effect phosphorus-free boiler water conditioner as described above.

[0011] The present invention can bring the following beneficial effects: The multi-effect phosphorus-free boiler water conditioner and the preparation method thereof of the present invention have the effects of scale inhibition, corrosion inhibition and antioxidant, and have zero phosphate addition and can be effective for a long time without the need for frequent addition; The possible principle is as follows: the present invention uses zirconium-based MOFs UiO-66-NH2 as a porous carrier to load polyepoxysuccinic acid PESA after activation to prevent scale and inhibit corrosion, and also serves as an inner layer carrier for slow release, uses sponge iron to react with oxygen, and uses mussel mucin to coat the MOFs complex-sponge iron system to form an outer layer slow release, and cooperates with antioxidant Irganox1010 and dispersant Pluronic F-127 to stabilize the system and extend the expiration time of mussel mucin; as the boiler runs, the mussel mucin gradually peels off and fails, the sponge iron gradually reacts with oxygen, and UiO-66-NH2 also gradually releases PESA to prevent scale and inhibit corrosion, ultimately achieving long-term scale inhibition, corrosion inhibition and antioxidant effects.

[0012] The above conditions are indispensable to work together. The parameters in the present invention are obtained by chance, and the effect of green low-phosphorus scale inhibition is finally achieved. DETAILED DESCRIPTION

[0013] In order to more clearly explain the overall concept of the present invention, the overall scheme of the present invention is described in detail in the form of embodiments below; in the following description, a large number of specific details are given to provide a more thorough understanding of the present invention; however, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details; in other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0014] In the present invention, the boiler has a capacity of 0.5 tons and a maximum pressure of 1.25 MPa. After one test, the boiler is cleaned and then used for the next test. The particle size of UiO-66-NH2 is about 500 nm, CAS: 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 screened to obtain the required size; the CAS of Pluronic F-127 is 9003-11-6.

[0015] Unless otherwise specified, all raw material components in the following examples can be purchased from commercial sources, the experimental instruments used are conventional laboratory experimental instruments, and the performance test methods are known in the art. The overall operating space environment is 25°C and the air humidity is 30%.

[0016] The preferred implementation is as follows: Embodiment 1: The following method is used to make a multi-effect phosphorus-free boiler water conditioner: Step 1: Prepare the carrier: Take UiO-66-NH2 and activate it in a vacuum dryer at a vacuum degree of 130Pa and a temperature of 120°C for 6h to obtain the carrier; Step 2: Combined loading: PESA was dissolved in pure water to prepare a 14% mass concentration PESA solution, the carrier was immersed in the PESA solution with a mass 10 times that of the carrier, 300W 40KHz ultrasonic treatment was performed for 30 min, and then stirred at 78°C for 15 h, and then dried in a vacuum dryer at a vacuum degree of 130Pa and a temperature of 90°C to remove water to obtain a MOFs composite; Step 3: preparing the coating: uniformly mixing 23% by mass of mussel mucin, 9% by mass of sponge iron with a particle size of 80 μm, 0.4% by mass of antioxidant Irganox 1010, 0.5% by mass of dispersant Pluronic F-127 and the balance of pure water to obtain the coating; Step 4: Mixing and coating: Evenly mix the MOFs complex with the coating whose mass is 1.8 times of the MOFs complex, dry and remove water in a vacuum dryer at a vacuum degree of 100 Pa and a temperature of 110° C. to obtain the multi-effect phosphorus-free boiler water conditioner.

[0017] Embodiment 2~embodiment 9: The only difference between Example 2 and Example 1 is that the mass fraction of mussel mucin is 20%; The only difference between Example 3 and Example 1 is that the mass fraction of mussel mucin is 27%; The only difference between Example 4 and Example 1 is that the mass fraction of sponge iron is 7%; The only difference between Example 5 and Example 1 is that the mass fraction of sponge iron is 11%; The only difference between Example 6 and Example 1 is that the mass fraction of the antioxidant Irganox1010 is 0.2%; The only difference between Example 7 and Example 1 is that the mass fraction of the antioxidant Irganox1010 is 0.6%; The only difference between Example 8 and Example 1 is that the mass fraction of the dispersant Pluronic F-127 is 0.3%; The only difference between Example 9 and Example 1 is that the mass fraction of the dispersant Pluronic F-127 is 0.8%.

[0018] Comparative Example 1 to Comparative Example 17: The only difference between Comparative Example 1 and Example 1 is that the mass fraction of mussel mucin is 10%; The only difference between Comparative Example 2 and Example 1 is that the mass fraction of mussel mucin is 40%; The only difference between Comparative Example 3 and Example 1 is that the mass fraction of sponge iron is 3%; The only difference between Comparative Example 4 and Example 1 is that the mass fraction of sponge iron is 20%; The only difference between Comparative Example 5 and Example 1 is that the mass fraction of the antioxidant Irganox1010 is 0.1%; The only difference between Comparative Example 6 and Example 1 is that the mass fraction of the antioxidant Irganox1010 is 1.0%; The only difference between Comparative Example 7 and Example 1 is that the mass fraction of the dispersant Pluronic F-127 is 0.1%; The only difference between Comparative Example 8 and Example 1 is that the mass fraction of the dispersant Pluronic F-127 is 1.5%; The difference between Comparative Example 9 and Example 1 is that the PESA solution is prepared to have a mass concentration of 5%; The difference between Comparative Example 10 and Example 1 is that the PESA solution is prepared to have a mass concentration of 30%; The difference between Comparative Example 11 and Example 1 is that the ultrasonic treatment is performed at 100W 40KHz; The difference between Comparative Example 12 and Example 1 is that the ultrasonic treatment is performed at 600W and 40KHz; The difference between Comparative Example 13 and Example 1 is that the mixture is stirred at 60° C. for 15 h; The difference between Comparative Example 14 and Example 1 is that the mixture is stirred at 100° C. for 15 h; The only difference between Comparative Example 15 and Example 1 is that the particle size of the sponge iron is 30 μm; The only difference between Comparative Example 16 and Example 1 is that the particle size of the sponge iron is 200 μm; The difference between Comparative Example 17 and Example 1 is that the mussel mucin is replaced by sponge iron, antioxidant Irganox1010, and dispersant Pluronic F-127 of the same mass ratio as those in Example 1; Blank group: The blank group did not add the multi-effect phosphorus-free boiler water conditioner and operated directly at 120°C.

[0019] A corresponding number of 16MnR type clean steel plates with a thickness of 0.5cm×25cm×10cm and a width of rust and scale are prepared for each example. One of the above clean steel plates is suspended in the lower middle part of the boiler of each example, and circulated at 120°C for 110 days; the operation is specifically as follows: water is injected at an amount 0.7 times the highest water level of the boiler, the initial dissolved oxygen of the injected water is measured to be 4.41 mg / L, and 0.3 times the mass of the injected water is added with the multi-effect phosphorus-free boiler water conditioner, the operating pipeline is a 15m long output steam pipeline, the steam is transferred to a small cooler for condensation and then returned to the boiler through a 15m long condensation reflux pipeline.

[0020] Take out each steel plate, wash and dry it, weigh and calculate the reduced mass of the steel plate as the anti-corrosion effect, in g, take 3 decimal places; collect, weigh and calculate the mass of the scale on the inner wall of each boiler as the scale inhibition effect, in g, take 1 decimal place; after the dissolved oxygen meter is calibrated, immerse the electrode in the tested water sample at the boiler drain outlet to measure the dissolved oxygen as the antioxidant effect, control the water flow rate to about 0.3m / s, in mg / L, take 2 decimal places. The test results are shown in Table 1.

[0021]

[0022] It can be seen from the data in Table 1 that, compared with other examples, the embodiments of the present invention, especially the solution of Embodiment 1 of the present invention, have less scaling and smaller steel plate reduction and dissolved oxygen content; the embodiments of the present invention, especially the multi-effect phosphorus-free boiler water conditioner and the preparation method thereof, while not using phosphate materials, have good scale inhibition effect and good anti-corrosion and anti-oxidation effects.

[0023] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

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 carrier: Take UiO-66-NH2 and activate it in a vacuum dryer at a vacuum degree of 130Pa and a temperature of 120°C for 6h to obtain the carrier; Step 2: Combined loading: PESA was dissolved in pure water to prepare a 14% mass concentration PESA solution, the carrier was immersed in the PESA solution with a mass 10 times that of the carrier, 300W 40KHz ultrasonic treatment was performed for 30 min, and then stirred at 78°C for 15 h, and then dried in a vacuum dryer at a vacuum degree of 130Pa and a temperature of 90°C to remove water to obtain a MOFs composite; Step 3: preparing the coating: uniformly mixing 20-27% by mass of mussel mucin, 7-11% by mass of sponge iron with a particle size of 80 μm, 0.2-0.6% by mass of antioxidant Irganox 1010, 0.3-0.8% by mass of dispersant Pluronic F-127 and the balance of pure water to obtain the coating; Step 4: Mixing and coating: Evenly mix the MOFs complex with the coating whose mass is 1.8 times of the MOFs complex, dry and remove water in a vacuum dryer at a vacuum degree of 100 Pa and a temperature of 110° C. to obtain the multi-effect phosphorus-free boiler water conditioner.

2. The method for preparing the multi-effect phosphorus-free boiler water conditioner according to claim 1, characterized in that: The mass fraction of the mussel mucin is 23%.

3. The method for preparing 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 method for preparing the multi-effect phosphorus-free boiler water conditioner according to claim 1, characterized in that: The mass fraction of the antioxidant Irganox1010 is 0.4%.

5. The method for preparing 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 the preparation method of the multi-effect phosphorus-free boiler water conditioner according to any one of claims 1 to 5.

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