Boiler cleaning agent and preparation method thereof

Abstract

The invention relates to a boiler cleaning agent and a preparation method thereof. The boiler cleaning agent comprises the following components in parts by weight: 35-45 parts of water; 10 to 15 parts of itaconic acid; 0.04 to 0.08 part of ferrous sulfate; 1.3 to 2.3 parts of acrylic acid; 4-6 parts of sodium persulfate; 0.8 to 1.2 parts of sodium hydrogen sulfite; 35 to 45 parts of hydroxyethylidene-1, 1-diphosphonic acid; comprising the following steps: sequentially adding water, itaconic acid and ferrous sulfate into a reaction kettle, and stirring and heating until reflux; sequentially adding acrylic acid, sodium persulfate and sodium hydrogen sulfite into the reaction kettle, and refluxing for 2-3 hours to obtain a reactant; and when the reactant is cooled to room temperature, adding 1-hydroxyethylidene-1, 1-diphosphonic acid, and uniformly stirring to obtain the boiler cleaning agent finished product. The boiler cleaning agent produced by the preparation method provided by the invention has strong cleaning power, can thoroughly clean scale, rust and the like on the inner wall of a boiler, also has the effect of inhibiting or preventing corrosion of boiler metal, and prevents the metal surface from being further damaged.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning agent preparation, in particular to a boiler cleaning agent and a preparation method thereof. Background Art

[0002] Boilers are important equipment in the industrial and civil fields. During long-term operation and use, they are affected by factors such as heat and scale. Scale, rust, and sediment often accumulate on the inner wall of the boiler, affecting its normal operation and heat exchange efficiency, and even causing equipment failure. At this time, using boiler cleaning agents can effectively remove these dirt, restore the normal operation of the boiler, and extend the service life of the boiler.

[0003] At present, most boiler cleaning agents on the market contain harmful chemical components such as strong acids, strong alkalis, and aluminum salts. These chemical components will not only cause certain damage to the metal surface, but also cause certain pollution to the environment.

[0004] Therefore, there is an urgent need to develop a boiler cleaning agent and a preparation method thereof which has excellent cleaning effect and does not cause pollution to the environment. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a boiler cleaning agent and a preparation method thereof which has excellent cleaning effect, low cost, simple preparation and low environmental harm.

[0006] The present invention solves the technical problem by adopting the following technical solutions:

[0007] A boiler cleaning agent, the composition and weight parts are as follows:

[0008] Water: 35-45 parts; itaconic acid: 10-15 parts; ferrous sulfate: 0.04-0.08 parts; acrylic acid: 1.3-2.3; sodium persulfate: 4-6; sodium bisulfite: 0.8-1.2; hydroxyethylidene diphosphonic acid: 35-45.

[0009] A method for preparing a boiler cleaning agent comprises the following steps:

[0010] S1. Add water, itaconic acid and ferrous sulfate into a reaction kettle in sequence, and heat to reflux with stirring;

[0011] S2, then add acrylic acid, sodium persulfate and sodium bisulfite into the reactor in sequence, and reflux for 2 to 3 hours to obtain a reactant;

[0012] S3. When the reactants are cooled to room temperature, hydroxyethylidene diphosphonic acid is added and stirred evenly to obtain a finished boiler cleaning agent.

[0013] Furthermore, in step S1, nitrogen gas is passed as a protective gas.

[0014] Moreover, the mass ratio of water to itaconic acid to ferrous sulfate is 60-320:15-105:0.1-0.6.

[0015] Moreover, the mass ratio of the acrylic acid to sodium persulfate to sodium bisulfite is 2-15:10-50:2-8.

[0016] Moreover, the mass ratio of the reactant to hydroxyethylidene diphosphoric acid is 90-500:60-350.

[0017] The advantages and positive effects of the present invention are:

[0018] 1. The boiler cleaning agent produced by the preparation method of the present invention has strong cleaning power and can thoroughly clean scale, rust, etc. on the inner wall of the boiler. In addition, it also has the function of inhibiting or preventing boiler metal corrosion, avoiding further damage to the metal surface.

[0019] 2. The boiler cleaning agent produced by the preparation method of the present invention is a water-based cleaning agent, which is non-toxic, non-combustible, does not contain heavy metals, and meets the requirements of safety and environmental protection.

[0020] 3. The preparation method of the present invention has simple production process, low cost, stable and reliable quality, and a wide range of applications, and can be applied to boilers, metal pipes, heat exchangers, etc. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0022] A method for preparing a boiler cleaning agent comprises the following steps:

[0023] S1. Add water, itaconic acid and ferrous sulfate into a reaction kettle in sequence, and heat to reflux with stirring;

[0024] S2, then add acrylic acid, sodium persulfate and sodium bisulfite into the reactor in sequence, and reflux for 2 to 3 hours to obtain a reactant;

[0025] S3. When the reactants are cooled to room temperature, hydroxyethylidene diphosphonic acid is added and stirred evenly to obtain a finished boiler cleaning agent.

[0026] Example 1

[0027] A method for preparing a boiler cleaning agent comprises the following steps:

[0028] S1. Add 60 kg of water, 17 kg of itaconic acid and 0.15 kg of ferrous sulfate into a reactor in sequence, stir and heat to reflux, and use nitrogen protection throughout the process;

[0029] S2, then add 2.8kg acrylic acid, 10kg sodium persulfate and 2.5kg sodium bisulfite into the reactor in sequence, and reflux for 2 hours;

[0030] S3. When the reactants are cooled to room temperature, 60 kg of hydroxyethylidene diphosphonic acid is added and stirred evenly to obtain a finished boiler cleaning agent.

[0031] Example 2

[0032] A method for preparing a boiler cleaning agent comprises the following steps:

[0033] S1. 117.5 kg of water, 37.5 kg of itaconic acid and 0.2 kg of ferrous sulfate were sequentially added into a reactor, and heated to reflux with stirring. The whole process was protected by nitrogen.

[0034] S2, then add 5.5kg acrylic acid, 18kg sodium persulfate and 3kg sodium bisulfite into the reactor in sequence, and reflux for 2 hours;

[0035] S3. When the reactants are cooled to room temperature, 120 kg of hydroxyethylidene diphosphonic acid is added and stirred evenly to obtain a finished boiler cleaning agent.

[0036] Example 3

[0037] A method for preparing a boiler cleaning agent comprises the following steps:

[0038] S1. 320 kg of water, 105 kg of itaconic acid and 0.6 kg of ferrous sulfate were sequentially added into a reactor, and the mixture was stirred and heated to reflux. The whole process was protected by nitrogen.

[0039] S2, then add 15kg of acrylic acid, 50kg of sodium persulfate and 8kg of sodium bisulfite into the reactor in sequence, and reflux for 3 hours;

[0040] S3. When the reactants are cooled to room temperature, 350 kg of hydroxyethylidene diphosphonic acid is added and stirred evenly to obtain a finished boiler cleaning agent.

[0041] Although the embodiments of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments.

Claims

1. A boiler cleaning agent, characterized in that: The composition and weight parts are as follows: Water: 35-45 parts; itaconic acid: 10-15 parts; ferrous sulfate: 0.04-0.08 parts; acrylic acid: 1.3-2.3; sodium persulfate: 4-6; sodium bisulfite: 0.8-1.2; hydroxyethylidene diphosphonic acid: 35-45.

2. The method for preparing a boiler cleaning agent according to claim 1, characterized in that: The steps include: S1. Add water, itaconic acid and ferrous sulfate into a reaction kettle in sequence, and heat to reflux with stirring; S2, then add acrylic acid, sodium persulfate and sodium bisulfite into the reaction kettle in sequence, and reflux for 2 to 3 hours to obtain a reactant; S3. When the reactants are cooled to room temperature, hydroxyethylidene diphosphonic acid is added and stirred evenly to obtain a finished boiler cleaning agent.

3. The method for preparing a boiler cleaning agent according to claim 2, characterized in that: In step S1, nitrogen gas is passed as a protective gas.

4. The method for preparing a boiler cleaning agent according to claim 2, characterized in that: The mass ratio of water to itaconic acid to ferrous sulfate is 60-320:15-105:0.1-0.

6.

5. The method for preparing a boiler cleaning agent according to claim 2, characterized in that: The mass ratio of the acrylic acid to sodium persulfate to sodium bisulfite is 2-15:10-50:2-8.

6. The method for preparing a boiler cleaning agent according to claim 2, characterized in that: The mass ratio of the reactant to hydroxyethylidene diphosphoric acid is 90-500:60-350.