A boiler water energy-saving and emission-reducing agent

Abstract

The invention discloses a boiler water energy-saving and emission-reducing agent, relates to the technical field of boiler energy-saving, and is prepared from the following components: 1,3-bis((trihydroxymethyl)methylamino)propane, sodium lignin sulfonate, caffeine, (3,6-diamino-9-acridinyl)boric acid, functional copolymer, sodium glycyrrhizinate, hydroxypropyl beta-cyclodextrin and deionized water; the functional copolymer includes a structural unit introduced by the following monomers: N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate. The agent has remarkable scale and corrosion inhibition effects, is safe and environmentally friendly to use, and has good energy-saving and emission-reducing effects.

Description

Technical Field

[0001] The invention relates to the technical field of boiler energy saving, and in particular to a boiler water energy saving and emission reduction agent. Background Art

[0002] The boiler is the heart of industrial power, and water and steam are the carriers of power output. Boilers play a very important role in the process of industrial production, and are closely linked to human production and life. In industrial production, boiler feed water needs to be treated. If it is used without water treatment or with unqualified treatment, it will be detrimental to the safety of boiler operation, and from the perspective of boiler water efficiency, it will not be able to achieve energy-saving and consumption-reducing effects. In order to effectively reduce the sewage discharge rate, increase the boiler steam production rate, ensure the normal and safe operation of the boiler, and thus achieve the effect of energy conservation and emission reduction, it is particularly important to develop a boiler water energy-saving and emission-reduction agent with good comprehensive performance.

[0003] The traditional boiler water treatment process uses trisodium phosphate or organic phosphate as scale inhibitors, and organic amines or ammonia water as pH regulators. This process has a large amount of sewage discharge, and the phosphorus content of the discharged sewage is difficult to treat. It also contains a lot of heat, which increases the energy consumption of the enterprise and does not conform to the current trend of energy conservation and emission reduction. At this stage, the chemicals for boiler water treatment still have more or less technical defects in that the scale inhibition and corrosion inhibition effects need to be further improved, and it is difficult to achieve the effect of energy conservation and emission reduction.

[0004] In order to solve the above problems, the Chinese invention patent with the authorization announcement number CN113307318B discloses an energy-saving synergist for boiler water treatment, which includes the following raw materials by weight: 10-20 parts of polyaspartic acid, 10-20 parts of 3-acrylamide dopamine, 5-10 parts of pH regulator, 3-8 parts of deoxidizer, 5-10 parts of reinforcing component, and 60-70 parts of deionized water; wherein the reinforcing component is obtained by modifying guar gum with a modifier and then oxidizing it, and the reinforcing component has a quaternary ammonium salt side chain, which can adsorb negatively charged ions and microorganisms, and the cross-linking oxidation reduces the hydrogen bonding effect inside the molecule, making its network structure more open, and the net capture and flocculation effect is better. When used in combination with other base materials, the water treatment effect is better and faster, and the energy consumption is reduced, and it has a good energy-saving and synergistic effect. However, the scale inhibition and corrosion inhibition effect of the agent still needs to be further improved.

[0005] It can be seen that the development of a boiler water energy-saving and emission-reduction agent that has significant anti-scaling and corrosion effects, is safe and environmentally friendly to use, and has good energy-saving and emission-reduction effects meets market demand, has broad market value and application prospects, and plays a very important role in promoting the development of the boiler energy-saving and emission-reduction field. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a boiler water energy-saving and emission-reducing agent which has significant scale and corrosion inhibition effects, is safe and environmentally friendly to use, and has good energy-saving and emission-reducing effects.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a boiler water energy-saving and emission-reducing agent, which is prepared by the following components in weight percentage: 1,3-bis((trihydroxymethyl)methylamino)propane 5-8wt%, sodium lignin sulfonate 4-6wt%, caffeine 0.8-1.5wt%, (3,6-diamino-9-acridinyl)boric acid 0.5-1wt%, functional copolymer 3-5wt%, sodium glycyrrhizinate 0.3-0.6wt%, hydroxypropyl β-cyclodextrin 1-3wt%, and the balance is deionized water; the functional copolymer includes structural units introduced by the following monomers: N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, and 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate.

[0008] Preferably, the preparation method of the functional copolymer comprises the following steps: adding N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate, and an initiator to a high boiling point solvent, stirring and reacting at 60-70° C. in an inert gas atmosphere for 3-5 hours, and after the reaction is completed, removing the solvent by rotary evaporation, dissolving the crude product with water, taking the supernatant and placing it in a dialysis bag, and placing the dialysis bag in water for 18-24 hours, and then removing the water in the dialysis bag by rotary evaporation to obtain a functional copolymer.

[0009] Preferably, the mass ratio of N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate, initiator, and high boiling point solvent is 1:(0.8-1.2):(1-3):0.5:(0.03-0.06):(15-25).

[0010] Preferably, the initiator is azobisisobutyronitrile.

[0011] Preferably, the high boiling point solvent is at least one of dimethyl sulfoxide, N,N-dimethylformamide and N-methylpyrrolidone.

[0012] Preferably, the inert gas is any one of nitrogen, helium, neon and argon.

[0013] Preferably, the boiler water energy-saving and emission-reduction agent further comprises the following components in weight percentage: 0.6-1wt% of tea polyphenols.

[0014] Another object of the present invention is to provide a method for preparing the boiler water energy-saving and emission-reduction agent, comprising the following steps: mixing the components uniformly according to weight percentage, and then accurately packaging them to obtain the boiler water energy-saving and emission-reduction agent.

[0015] Due to the application of the above technical solution, the present invention has the following beneficial effects:

[0016] (1) The preparation method of the boiler water energy-saving and emission-reducing agent disclosed in the present invention only requires that the components be uniformly mixed according to weight percentage and then accurately packaged. No special equipment is required, and the capital investment is small, the energy consumption is low, the process flow is simple, the impact on the environment is small, the labor intensity is low, and it is suitable for continuous large-scale production, and has a high value for promotion and application.

[0017] (2) The boiler water energy-saving and emission-reducing agent disclosed in the present invention is prepared from the following components in percentage by weight: 5-8wt% of 1,3-bis((trihydroxymethyl)methylamino)propane, 4-6wt% of sodium lignin sulfonate, 0.8-1.5wt% of caffeine, 0.5-1wt% of (3,6-diamino-9-acridinyl)boric acid, 3-5wt% of functional copolymer, 0.3-0.6wt% of sodium glycyrrhizinate, 1-3wt% of hydroxypropyl β-cyclodextrin, and the balance is deionized water; the functional copolymer includes structural units introduced by the following monomers: N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, and 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate. Through the mutual coordination and joint action of various components, the boiler water energy-saving and emission-reduction agent can achieve significant scale inhibition and corrosion inhibition effects with a small amount of use. It is safe and environmentally friendly to use and has good energy-saving and emission-reduction effects.

[0018] (3) The boiler water energy-saving and emission-reduction agent disclosed in the present invention can significantly improve the anti-scaling, anti-corrosion and descaling effects of the boiler water energy-saving and emission-reduction agent through the reasonable selection of components and dosage contents, and the synergistic effect between the components can significantly improve the anti-scaling, anti-corrosion and descaling effects of the boiler water energy-saving and emission-reduction agent, and avoid the co-boiling of steam and water; it can also remove the old scale already existing in the boiler to form flowable sludge, which is discharged from the boiler body through regular sewage discharge; it is beneficial to improve the thermal efficiency of the boiler and reduce the additional fuel consumption of the boiler; the formula does not contain any phosphorus element, is pollution-free to the environment, and is extremely green and environmentally friendly.

[0019] (4) The boiler water energy-saving and emission-reducing agent disclosed in the present invention comprises a functional copolymer comprising structural units introduced from the following monomers: N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethylmethylacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate; the simultaneous introduction of morpholine, amide, amphoteric organic ion salt, benzotriazole, hydroxyl and ester structures can effectively improve its chelating adsorption capacity and enhance its corrosion and scale inhibition performance; the simultaneous introduction of these groups into the polymer forms a component with a relatively high molecular weight, which can adsorb temporary hardness, permanent hardness and salts containing iron, chlorine, silicon, etc. in water, forming a fluid, amorphous and non-sticky sludge that is easy to remove. DETAILED DESCRIPTION

[0020] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0021] Embodiment 1, a boiler water energy-saving and emission-reduction agent is prepared by the following components in weight percentage: 1,3-bis((trihydroxymethyl)methylamino)propane 5wt%, sodium lignin sulfonate 4wt%, caffeine 0.8wt%, (3,6-diamino-9-acridinyl)boric acid 0.5wt%, functional copolymer 3wt%, sodium glycyrrhizinate 0.3wt%, hydroxypropyl β-cyclodextrin 1wt%, and the balance is deionized water; the functional copolymer includes structural units introduced by the following monomers: N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate.

[0022] The preparation method of the functional copolymer comprises the following steps: adding N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate and an initiator into a high boiling point solvent, stirring and reacting at 60°C for 3 hours in an inert gas atmosphere, removing the solvent by rotary evaporation after the reaction is completed, dissolving the crude product with water, taking the supernatant and placing it in a dialysis bag, and placing the dialysis bag in water for 1 dialysis. 8h, then the water in the dialysis bag is removed by rotary evaporation to obtain a functional copolymer; the mass ratio of N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate, initiator, and high boiling point solvent is 1:0.8:1:0.5:0.03:15; the initiator is azobisisobutyronitrile; the high boiling point solvent is dimethyl sulfoxide; the inert gas is nitrogen. Through GPC test, the M of the functional copolymer is measured. n =7350g / mol, M W / M n =1.417; through elemental analysis, weight change and calculation, the mass ratio of the structural units introduced by N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, and 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate in the functional copolymer is 1:0.79:0.99:0.48.

[0023] The boiler water energy-saving and emission-reduction agent also includes the following components in percentage by weight: 0.6 wt % of tea polyphenols.

[0024] A method for preparing the boiler water energy-saving and emission-reducing agent comprises the following steps: mixing the components uniformly according to weight percentage, and then accurately packaging them to obtain the boiler water energy-saving and emission-reducing agent.

[0025] Embodiment 2, a boiler water energy-saving and emission-reduction agent is formulated from the following components in weight percentage: 6wt% of 1,3-bis((trihydroxymethyl)methylamino)propane, 4.5wt% of sodium lignin sulfonate, 1wt% of caffeine, 0.6wt% of (3,6-diamino-9-acridinyl)boric acid, 3.5wt% of functional copolymer, 0.4wt% of sodium glycyrrhizinate, 1.5wt% of hydroxypropyl β-cyclodextrin, and the balance is deionized water; the functional copolymer includes structural units introduced by the following monomers: N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, and 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate.

[0026] The preparation method of the functional copolymer comprises the following steps: adding N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate and an initiator into a high boiling point solvent, stirring and reacting at 63°C for 3.5 hours in an inert gas atmosphere, removing the solvent by rotary evaporation after the reaction is completed, dissolving the crude product with water, taking the supernatant and placing it in a dialysis bag, and placing the dialysis bag in water for dialysis for 20 hours. Then, the water in the dialysis bag is removed by rotary evaporation to obtain a functional copolymer; the mass ratio of N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate, initiator, and high boiling point solvent is 1:0.9:1.5:0.5:0.04:17; the initiator is azobisisobutyronitrile; the high boiling point solvent is N,N-dimethylformamide; and the inert gas is helium.

[0027] The boiler water energy-saving and emission-reduction agent also includes the following components in percentage by weight: 0.7 wt % of tea polyphenols.

[0028] A method for preparing the boiler water energy-saving and emission-reducing agent comprises the following steps: mixing the components uniformly according to weight percentage, and then accurately packaging them to obtain the boiler water energy-saving and emission-reducing agent.

[0029] Embodiment 3, a boiler water energy-saving and emission-reduction agent is formulated from the following components in weight percentage: 6.5wt% of 1,3-bis((trihydroxymethyl)methylamino)propane, 5wt% of sodium lignin sulfonate, 1.2wt% of caffeine, 0.8wt% of (3,6-diamino-9-acridinyl)boric acid, 4wt% of functional copolymer, 0.45wt% of sodium glycyrrhizinate, 2wt% of hydroxypropyl β-cyclodextrin, and the balance is deionized water; the functional copolymer includes structural units introduced by the following monomers: N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, and 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate.

[0030] Preferably, the preparation method of the functional copolymer comprises the following steps: adding N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate, and an initiator to a high boiling point solvent, stirring and reacting at 65° C. for 4 hours in an inert gas atmosphere, removing the solvent by rotary evaporation after the reaction is completed, dissolving the crude product with water, taking the supernatant and placing it in a dialysis bag, and placing the dialysis bag in water for dialysis 21h, then rotary evaporation to remove water in the dialysis bag to obtain a functional copolymer; the mass ratio of N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethylmethylacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate, initiator, and high boiling point solvent is 1:1:2:0.5:0.045:20; the initiator is azobisisobutyronitrile; the high boiling point solvent is N-methylpyrrolidone; and the inert gas is neon.

[0031] The boiler water energy-saving and emission-reduction agent also includes the following components in weight percentage: 0.8wt% of tea polyphenols.

[0032] A method for preparing the boiler water energy-saving and emission-reducing agent comprises the following steps: mixing the components uniformly according to weight percentage, and then accurately packaging them to obtain the boiler water energy-saving and emission-reducing agent.

[0033] Embodiment 4, a boiler water energy-saving and emission-reduction agent is formulated from the following components in weight percentage: 7.5wt% of 1,3-bis((trihydroxymethyl)methylamino)propane, 5.5wt% of sodium lignin sulfonate, 1.4wt% of caffeine, 0.9wt% of (3,6-diamino-9-acridinyl)boric acid, 4.5wt% of functional copolymer, 0.55wt% of sodium glycyrrhizinate, 2.5wt% of hydroxypropyl β-cyclodextrin, and the balance is deionized water; the functional copolymer includes structural units introduced by the following monomers: N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, and 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate.

[0034] The preparation method of the functional copolymer comprises the following steps: adding N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate and an initiator to a high boiling point solvent, stirring and reacting at 68°C in an inert gas atmosphere for 4.5 hours, removing the solvent by rotary evaporation after the reaction is completed, dissolving the crude product with water, taking the supernatant and placing it in a dialysis bag, placing the dialysis bag in water for dialysis for 23 hours, and then removing the water in the dialysis bag by rotary evaporation to obtain to a functional copolymer; the mass ratio of the N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethylmethylacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate, initiator, and high boiling point solvent is 1:1.1:2.5:0.5:0.055:23; the initiator is azobisisobutyronitrile; the high boiling point solvent is a mixture of dimethyl sulfoxide, N,N-dimethylformamide, and N-methylpyrrolidone in a mass ratio of 1:2:3; the inert gas is argon.

[0035] The boiler water energy-saving and emission-reduction agent also includes the following components in weight percentage: 0.9wt% of tea polyphenols.

[0036] A method for preparing the boiler water energy-saving and emission-reducing agent comprises the following steps: mixing the components uniformly according to weight percentage, and then accurately packaging them to obtain the boiler water energy-saving and emission-reducing agent.

[0037] Example 5, a boiler water energy-saving and emission-reduction agent, is formulated from the following components in weight percentage: 8wt% of 1,3-bis((trihydroxymethyl)methylamino)propane, 6wt% of sodium lignin sulfonate, 1.5wt% of caffeine, 1wt% of (3,6-diamino-9-acridinyl)boric acid, 5wt% of functional copolymer, 0.6wt% of sodium glycyrrhizinate, 3wt% of hydroxypropyl β-cyclodextrin, and the balance is deionized water; the functional copolymer includes structural units introduced by the following monomers: N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethylmethylacrylamide, and 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate.

[0038] The preparation method of the functional copolymer comprises the following steps: adding N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate and an initiator into a high boiling point solvent, stirring and reacting at 70°C in an inert gas atmosphere for 5 hours, removing the solvent by rotary evaporation after the reaction is completed, dissolving the crude product with water, taking the supernatant and placing it in a dialysis bag, and placing the dialysis bag in water for 2 hours. 4h, then rotary evaporation to remove water in the dialysis bag to obtain a functional copolymer; the mass ratio of N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethylmethylacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate, initiator, and high boiling point solvent is 1:1.2:3:0.5:0.06:25; the initiator is azobisisobutyronitrile; the high boiling point solvent is dimethyl sulfoxide; and the inert gas is nitrogen.

[0039] The boiler water energy-saving and emission-reduction agent also includes the following components in weight percentage: 1wt% of tea polyphenols.

[0040] A method for preparing the boiler water energy-saving and emission-reducing agent comprises the following steps: mixing the components uniformly according to weight percentage, and then accurately packaging them to obtain the boiler water energy-saving and emission-reducing agent.

[0041] Comparative Example 1, a boiler water energy-saving and emission-reduction agent and a preparation method thereof, is substantially the same as Example 1, except that caffeine and (3,6-diamino-9-acridinyl)boric acid are not added.

[0042] Comparative Example 2, a boiler water energy-saving and emission-reduction agent and a preparation method thereof, is basically the same as Example 1, except that the functional copolymer and hydroxypropyl β-cyclodextrin are not added.

[0043] In order to further illustrate the beneficial technical effects of the boiler water energy-saving and emission-reduction agents involved in each embodiment of the present invention, relevant performance tests were carried out on the boiler water energy-saving and emission-reduction agents involved in Examples 1-5 and Comparative Examples 1-2. The test method refers to GB / T16811-2018, and the corrosion inhibition rate is calculated according to corrosion inhibition rate = V1 / V0×100%, wherein V0 is the value of the corrosion rate of the blank test of the specimen, in millimeters per year (mm / a); V1 is the value of the corrosion rate of the specimen, in millimeters per year (mm / a), and the amount of the agent added during the test is controlled to be 8 mg per liter of boiler water.

[0044] As can be seen from Table 1, the boiler water energy-saving and emission-reduction agents involved in the embodiments of the present invention have better scale inhibition and corrosion inhibition effects than the comparative products; the combined use of caffeine, (3,6-diamino-9-acridinyl)boric acid, functional copolymers and hydroxypropyl β-cyclodextrin is beneficial to improving the above-mentioned properties.

[0045] Table 1

[0046] project Scale inhibition rate (%) Corrosion inhibition rate (%) Example 1 99.67 99.59 Example 2 99.72 99.70 Example 3 99.80 99.83 Example 4 99.90 99.91 Example 5 99.95 99.97 Comparative Example 1 98.25 98.77 Comparative Example 2 97.79 96.35

[0047] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A boiler water energy-saving and emission-reduction agent, characterized in that: The invention is prepared from the following components in weight percentage: 5-8wt% of 1,3-bis((trihydroxymethyl)methylamino)propane, 4-6wt% of sodium lignin sulfonate, 0.8-1.5wt% of caffeine, 0.5-1wt% of (3,6-diamino-9-acridinyl)boric acid, 3-5wt% of functional copolymer, 0.3-0.6wt% of sodium glycyrrhizinate, 1-3wt% of hydroxypropyl β-cyclodextrin, and the balance is deionized water; the functional copolymer includes structural units introduced by the following monomers: N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate; The preparation method of the functional copolymer comprises the following steps: adding N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate and an initiator to a high boiling point solvent, stirring and reacting for 3-5 hours at 60-70° C. in an inert gas atmosphere, removing the solvent by rotary evaporation after the reaction is completed, dissolving the crude product with water, taking the supernatant and placing it in a dialysis bag, placing the dialysis bag in water for dialysis for 18-24 hours, and then removing the water in the dialysis bag by rotary evaporation to obtain the functional copolymer; The mass ratio of the N-acryloylmorpholine, 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate, initiator, and high boiling point solvent is 1:(0.8-1.2):(1-3):0.5:(0.03-0.06):(15-25).

2. The boiler water energy-saving and emission-reducing agent according to claim 1, characterized in that: The initiator is azobisisobutyronitrile.

3. The boiler water energy-saving and emission-reducing agent according to claim 1, characterized in that: The high boiling point solvent is at least one of dimethyl sulfoxide, N,N-dimethylformamide and N-methylpyrrolidone.

4. The boiler water energy-saving and emission-reducing agent according to claim 1, characterized in that: The inert gas is any one of nitrogen, helium, neon and argon.

5. The boiler water energy-saving and emission-reducing agent according to claim 1, characterized in that: The boiler water energy-saving and emission-reduction agent also includes the following components in percentage by weight: 0.6-1 wt % of tea polyphenols.

6. A method for preparing the boiler water energy-saving and emission-reducing agent according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: uniformly mixing the components according to weight percentage, and accurately packaging them to obtain a boiler water energy-saving and emission-reducing agent.