Novel ship boiler water treatment agent

Abstract

The invention provides a novel ship boiler water treatment agent. The invention relates to a novel ship boiler water treatment agent, which comprises the following components by weight: 0.1-1% of hydroquinone; 20 to 30% of DEHA (diethyhexylhydroxylamine 10 to 20% of sodium hexametaphosphate; 5-10% of potassium pyrophosphate; 5-10% of polymaleic acid; 0.1 to 1% of a bio-based surfactant; 5 to 20 percent of NN (N, N-diethylhydroxylamine); and the balance of pure water. The invention provides a novel ship boiler water treatment agent which is prepared by compounding hydroquinone, DEHA, sodium hexametaphosphate, potassium pyrophosphate, polymaleic acid, a bio-based surfactant, NN diethylhydroxylamine and other components, and a dynamic chelation-dispersion system and a nonionic double-effect oxygen removal environment are constructed. According to the present invention, the efficient deoxidizing agent has characteristics of simple preparation process, easy operation, low cost, easy implementation, multi-stage chelating and crystal nucleus steric dispersion on calcium and magnesium ions, significant effects of rapid deoxidizing speed, strong old scale stripping ability and the like, can effectively cope with water quality fluctuation under complex working conditions of ships, can achieve efficient deoxidizing, can provide excellent scale inhibition and old scale self-cleaning functions, and can meet the treatment requirements of complex working conditions of ship boilers.

Description

Technical Field

[0001] This invention relates to the field of marine boiler water treatment technology, and in particular to a novel marine boiler water treatment agent. Background Technology

[0002] During ship navigation, the boiler, as the core power or auxiliary heat source equipment, plays a crucial role in ensuring its operational stability.

[0003] Currently, ship boiler feedwater usually comes from shore power freshwater or shipboard desalination systems. Due to changes in navigation areas and equipment operating conditions, the quality of the feedwater fluctuates greatly.

[0004] In existing technologies, traditional marine boiler water treatment agents typically have limited functions. One type of agent primarily targets deoxygenation by adding sodium sulfite or hydrazine to eliminate dissolved oxygen in the water, but it performs poorly in scale inhibition, and some agents are toxic or prone to generating strong electrolyte interference. Another type of agent mainly targets descaling by adding phosphates or simple polymer dispersants to inhibit calcium and magnesium ion scaling, but it often lacks effective deoxygenation protection. This step-by-step addition or functional isolation treatment method makes it difficult for boiler systems to simultaneously cope with oxygen corrosion and scaling risks, especially in high-heat-receiving surfaces, where under-scale corrosion can easily lead to perforation of metal tube walls. In addition, existing agents lack effective penetration and removal capabilities for existing scale layers, making it difficult to maintain the long-term cleanliness of boiler heat exchange surfaces under complex operating conditions.

[0005] Therefore, it is necessary to provide a new type of marine boiler water treatment agent to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a novel marine boiler water treatment agent that solves the problems of traditional treatment agents having limited functions, being unable to simultaneously and efficiently remove oxygen and scale, and being unable to cope with boiler corrosion and scaling caused by water quality fluctuations.

[0007] To solve the above-mentioned technical problems, the present invention provides a novel marine boiler water treatment agent, which comprises the following components by weight percentage:

[0008] Hydroquinone 0.1-1%;

[0009] DEHA 20-30%;

[0010] Sodium hexametaphosphate 10-20%;

[0011] Potassium pyrophosphate 5-10%;

[0012] Polymaleic acid 5-10%;

[0013] Bio-based surfactants 0.1-1%;

[0014] NN diethylhydroxylamine 5-20%;

[0015] The remainder is pure water.

[0016] Preferably, the bio-based surfactant is any one of alkyl polysaccharide glycoside, sodium fatty acid methyl ester sulfonate, and sodium lignin sulfonate.

[0017] Preferably, the polymaleic acid has an average molecular weight of 400-800.

[0018] Preferably, the weight ratio of DEHA to NN diethylhydroxylamine is 1:1 to 4:1.

[0019] Preferably, the hydroquinone acts as a catalyst in the pharmaceutical preparation for the deoxygenation reaction between DEHA and NN-diethylhydroxylamine.

[0020] Preferably, the preparation method of the novel marine boiler water treatment agent is carried out by the following steps, characterized by including the following steps:

[0021] S1: Add pure water to the reactor in proportion, and add sodium hexametaphosphate, potassium pyrophosphate and polymaleic acid in sequence while stirring, and stir until the solid is completely dissolved;

[0022] S2: Add bio-based surfactant to the solution obtained in step S1 and adjust the stirring speed to 100-200 rpm;

[0023] S3: Hydroquinone, DEHA and NN diethylhydroxylamine are added sequentially to the solution obtained in step S2, and the mixture is stirred at room temperature for 30-60 minutes to obtain the integrated pharmaceutical agent.

[0024] Preferably, the stirring speed in S1 is 300-500 rpm.

[0025] Preferably, the novel marine boiler water treatment agent is used in the treatment of low- and medium-pressure boiler water in ships.

[0026] Compared with related technologies, the novel marine boiler water treatment agent provided by this invention has the following beneficial effects:

[0027] This invention provides a novel water treatment agent for marine boilers, formulated with hydroquinone, DEHA, sodium hexametaphosphate, potassium pyrophosphate, polymaleic acid, bio-based surfactants, and N,N-diethylhydroxylamine. It utilizes a multi-stage deoxygenation system constructed from organic hydroxylamine and hydroquinone to address oxygen corrosion, while simultaneously employing the synergistic chelation of organic phosphonic acid and inorganic polyphosphate to inhibit scale formation and remove old scale. By constructing a dynamic chelation-dispersion system and a non-ionic dual-effect deoxygenation environment, it achieves multi-stage chelation and steric dispersion of calcium and magnesium ions, exhibiting significant effects such as rapid deoxygenation and strong scale removal capability. It effectively addresses water quality fluctuations under complex marine operating conditions. The precise proportions and synergistic effects of the components achieve efficient deoxygenation while demonstrating excellent scale inhibition and self-cleaning functions for old scale, meeting the treatment needs of complex marine boiler operating conditions. Attached Figure Description

[0028] Figure 1 A percentage table of three formulation examples of a novel marine boiler water treatment agent provided by the present invention;

[0029] Figure 2 A comparative percentage table of two formulations of a novel marine boiler water treatment agent provided by the present invention;

[0030] Figure 3 A comparison diagram of the static scale inhibition performance of an embodiment and a comparative example of a novel marine boiler water treatment agent provided by the present invention under simulated marine boiler operating conditions.

[0031] Figure 4 Examples and comparative examples of a novel marine boiler water treatment agent provided by the present invention show deoxygenation rate curves under different temperature conditions. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] First Embodiment

[0034] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A percentage table of three formulation examples of a novel marine boiler water treatment agent provided by the present invention; Figure 2 A comparative percentage table of two formulations of a novel marine boiler water treatment agent provided by the present invention; Figure 3 A comparison diagram of the static scale inhibition performance of an embodiment and a comparative example of a novel marine boiler water treatment agent provided by the present invention under simulated marine boiler operating conditions. Figure 4Examples and comparative examples of a novel marine boiler water treatment agent provided by the present invention show deoxygenation rate curves under different temperature conditions.

[0035] A novel marine boiler water treatment agent, by weight percentage, comprises the following components:

[0036] Hydroquinone 0.1-1%;

[0037] DEHA 20-30%;

[0038] Sodium hexametaphosphate 10-20%;

[0039] Potassium pyrophosphate 5-10%;

[0040] Polymaleic acid 5-10%;

[0041] Bio-based surfactants 0.1-1%;

[0042] NN diethylhydroxylamine 5-20%;

[0043] The remainder is pure water.

[0044] The bio-based surfactant is any one of alkyl polysaccharide glycoside, sodium fatty acid methyl ester sulfonate, and sodium lignin sulfonate.

[0045] The average molecular weight of the polymaleic acid is 400-800.

[0046] The weight ratio of DEHA to NN diethylhydroxylamine is 1:1 to 4:1.

[0047] Hydroquinone acts as a catalyst in the pharmaceutical preparation for the deoxygenation reaction between DEHA and NN-diethylhydroxylamine.

[0048] Application of the novel marine boiler water treatment agent in the treatment of low- and medium-pressure boiler water in ships.

[0049] Example 1

[0050] This embodiment provides a composite water treatment agent, the formulation of which is as follows by weight percentage: hydroquinone 0.5%, DEHA 25%, sodium hexametaphosphate 15%, potassium pyrophosphate 8%, polymaleic acid (average molecular weight 600) 7%, bio-based surfactant (alkyl polyglycoside APG) 0.5%, NN diethylhydroxylamine 12%, and pure water 32%.

[0051] Preparation method: Add pure water to the reaction vessel, start stirring, add sodium hexametaphosphate, potassium pyrophosphate and polymaleic acid in sequence, stir for 15 minutes until the solution is clear; then add APG, adjust the speed to 150 rpm; finally add hydroquinone, DEHA and NN diethylhydroxylamine, continue stirring at room temperature for 45 minutes, filter and package.

[0052] Example 2

[0053] This embodiment provides a low-concentration composite water treatment agent, the formulation of which, by weight percentage, is: hydroquinone 0.1%, DEHA 20%, sodium hexametaphosphate 20%, potassium pyrophosphate 10%, polymaleic acid 5%, bio-based surfactant 0.1%, NN diethylhydroxylamine 5%, and pure water 39.8%. The preparation process is the same as in Example 1.

[0054] Example 3

[0055] This embodiment provides a high-concentration composite water treatment agent, the formulation of which, by weight percentage, is: hydroquinone 1%, DEHA 30%, sodium hexametaphosphate 10%, potassium pyrophosphate 5%, polymaleic acid 10%, bio-based surfactant 1%, NN diethylhydroxylamine 20%, and pure water 23%. The preparation process is the same as in Example 1.

[0056] Comparative Example 1

[0057] Compared with Example 1, hydroquinone and N,N-diethylhydroxylamine are missing, while the other components and proportions remain unchanged, and the missing parts are made up with pure water.

[0058] Comparative Example 2

[0059] Compared to Example 1, polymaleic acid and bio-based surfactants are missing, while the remaining components and proportions remain unchanged, with the missing portion being made up by pure water.

[0060] Experimental data analysis

[0061] To verify the technical effect of the present invention, the above embodiments and comparative examples were subjected to performance tests. The test conditions simulated the working conditions of a ship boiler (pressure 1.2 MPa, water temperature 190℃, feedwater hardness 3.5 mmol / L).

[0062] 1. Scale inhibition rate test:

[0063] Example 1: Scale inhibition rate 98.5%

[0064] Example 2: Scale inhibition rate 97.8%

[0065] - Comparative Example 2: Scale inhibition rate 82.4%

[0066] Conclusion: The addition of polymaleic acid and bio-based surfactants significantly improved the scale inhibition and dispersion performance of the agent at high temperatures.

[0067] 2. Deoxygenation rate test (determining the time required for dissolved oxygen to decrease from 8 mg / L to 0.1 mg / L):

[0068] Example 1: 45 seconds

[0069] Example 3: 38 seconds

[0070] - Comparative Example 1: 210 seconds

[0071] Conclusion: Hydroquinone combined with various hydroxylamines exhibits a strong synergistic effect in catalytic oxygen removal.

[0072] 3. Depreciation removal test:

[0073] Boiler tube sections with a 3mm thick carbonate scale layer were immersed in a 1% diluted solution of Example 1 and circulated at 80°C for 48 hours. The experimental results showed that the scale layer shedding area in the Example 1 group reached 92%, while the shedding area in the control group without added bio-based surfactants was only 35%.

[0074] The working principle of the novel marine boiler water treatment agent provided by this invention is as follows:

[0075] During operation, first add pure water to the reactor, start stirring, and then add sodium hexametaphosphate, potassium pyrophosphate and polymaleic acid in sequence, stirring for 15 minutes until the solution is clear; then add APG and adjust the speed to 150 rpm; finally add hydroquinone, DEHA and NN diethylhydroxylamine, and continue stirring at room temperature for 45 minutes, then filter and package.

[0076] Compared with related technologies, the novel marine boiler water treatment agent provided by this invention has the following beneficial effects:

[0077] This invention provides a novel water treatment agent for marine boilers, formulated with hydroquinone, DEHA, sodium hexametaphosphate, potassium pyrophosphate, polymaleic acid, bio-based surfactants, and N,N-diethylhydroxylamine. It utilizes a multi-stage deoxygenation system constructed from organic hydroxylamine and hydroquinone to address oxygen corrosion, while simultaneously employing the synergistic chelation of organic phosphonic acid and inorganic polyphosphate to inhibit scale formation and remove old scale. By constructing a dynamic chelation-dispersion system and a non-ionic dual-effect deoxygenation environment, it achieves multi-stage chelation and steric dispersion of calcium and magnesium ions, exhibiting significant effects such as rapid deoxygenation and strong scale removal capability. It effectively addresses water quality fluctuations under complex marine operating conditions. The precise proportions and synergistic effects of the components achieve efficient deoxygenation while demonstrating excellent scale inhibition and self-cleaning functions for old scale, meeting the treatment needs of complex marine boiler operating conditions.

[0078] Second Embodiment

[0079] Based on the novel marine boiler water treatment agent provided in the first embodiment of this application, the second embodiment of this application proposes another novel marine boiler water treatment agent. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0080] Specifically, the second embodiment of this application provides a novel marine boiler water treatment agent that differs in that the preparation method of the novel marine boiler water treatment agent is carried out using the following steps, characterized by including the following steps:

[0081] S1: Add pure water to the reactor in proportion, and add sodium hexametaphosphate, potassium pyrophosphate and polymaleic acid in sequence while stirring, and stir until the solid is completely dissolved;

[0082] S2: Add bio-based surfactant to the solution obtained in step S1 and adjust the stirring speed to 100-200 rpm;

[0083] S3: Hydroquinone, DEHA and NN diethylhydroxylamine are added sequentially to the solution obtained in step S2, and the mixture is stirred at room temperature for 30-60 minutes to obtain the integrated pharmaceutical agent.

[0084] The stirring speed in S1 is 300-500 rpm.

[0085] The working principle of the novel marine boiler water treatment agent provided by this invention is as follows:

[0086] During operation, first weigh pure water according to the weight percentage and add it to the reactor, start the stirring device, and then add sodium hexametaphosphate, potassium pyrophosphate and polymaleic acid in batches, and continue stirring until the solid materials in the reactor are completely dissolved and the solution is uniform and transparent.

[0087] Next, alkyl polysaccharide glycosides were added to the above solution, the stirring speed was reduced, and the mixture was stirred for 10 minutes to ensure uniform dispersion of the surfactant. Then, hydroquinone, DEHA, and NN diethylhydroxylamine were added in sequence, and the mixture was stirred at room temperature for 45 minutes. During this time, the concentration of the solution was monitored by an online refractometer. Once the concentration stabilized, the stirring was stopped, and the resulting integrated reagent was filtered through a 0.45 μm filter membrane and dispensed into plastic buckets to complete the preparation.

[0088] Compared with related technologies, the novel marine boiler water treatment agent provided by this invention has the following beneficial effects:

[0089] This invention provides a novel marine boiler water treatment agent. A non-ionic catalytic deoxygenation system is constructed through the compounding of DEHA, NN-diethylhydroxylamine, and hydroquinone. Hydroquinone acts as an electron carrier, synergistically with the two hydroxylamine derivatives to achieve rapid removal of dissolved oxygen at lower temperatures, effectively preventing oxygen corrosion and under-scale corrosion on boiler heating surfaces. The synergistic solubilization effect of sodium hexametaphosphate and potassium pyrophosphate converts calcium and magnesium hardness ions in the water into stable soluble chelates. Combined with highly dispersible polymaleic acid, the lattice distortion effect inhibits scale crystal growth, thus achieving excellent scale inhibition performance. The agent incorporates a bio-based surfactant, whose excellent wetting and penetration properties allow the chelating components to penetrate deep into the old scale layer. Through a "dynamic chelation-dispersion" mechanism, the old scale is gradually peeled off and suspended, achieving a self-cleaning function for the boiler heating surface and significantly improving heat exchange efficiency.

[0090] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A novel water treatment agent for a ship boiler, characterized by, By weight percentage, it includes the following components: Hydroquinone 0.1-1%; DEHA 20-30%; Sodium hexametaphosphate 10-20%; Potassium pyrophosphate 5-10%; Polymaleic acid 5-10%; Bio-based surfactants 0.1-1%; NN diethylhydroxylamine 5-20%; The remainder is pure water.

2. The novel marine boiler water treatment agent according to claim 1, characterized in that, The bio-based surfactant is any one of alkyl polysaccharide glycoside, sodium fatty acid methyl ester sulfonate, and sodium lignin sulfonate.

3. The novel marine boiler water treatment agent according to claim 1, characterized in that, The average molecular weight of the polymaleic acid is 400-800.

4. The novel marine boiler water treatment agent according to claim 1, characterized in that, The weight ratio of DEHA to NN diethylhydroxylamine is 1:1 to 4:

1.

5. The novel marine boiler water treatment agent according to claim 1, characterized in that, Hydroquinone acts as a catalyst in the pharmaceutical preparation for the deoxygenation reaction between DEHA and NN-diethylhydroxylamine.

6. The novel marine boiler water treatment agent according to claim 1, wherein the preparation method of the novel marine boiler water treatment agent is carried out by the following steps, characterized in that, Includes the following steps: S1: Add pure water to the reactor in proportion, and add sodium hexametaphosphate, potassium pyrophosphate and polymaleic acid in sequence while stirring, and stir until the solid is completely dissolved; S2: Add bio-based surfactant to the solution obtained in step S1 and adjust the stirring speed to 100-200 rpm; S3: Hydroquinone, DEHA and NN diethylhydroxylamine are added sequentially to the solution obtained in step S2, and the mixture is stirred at room temperature for 30-60 minutes to obtain the integrated pharmaceutical agent.

7. A novel marine boiler water treatment agent according to claim 6, characterized in that, The stirring speed in S1 is 300-500 rpm.

8. The novel marine boiler water treatment agent according to claim 1, characterized in that, Application of the novel marine boiler water treatment agent in the treatment of low- and medium-pressure boiler water in ships.

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