阅读说明：本技术 一种非磷酸系中、低压锅炉清洗剂及其制备方法 (Non-phosphoric acid series medium and low pressure boiler cleaning agent and preparation method thereof ) 是由 钟奇军 周卫华 陈谦 王小东 于 2020-12-03 设计创作，主要内容包括：本发明属于低压锅炉清洗剂技术领域,尤其为一种非磷酸系中、低压锅炉清洗剂及其制备方法,所述非磷酸系中、低压锅炉清洗剂包括以下质量浓度的组分：液碱20-40％、聚丙烯酸钠10-20％、水合肼5-8％、有机酸30-50％、表面活性剂1-5％、缓蚀剂5-8％、除锈助剂2-4％、防腐剂1-3％和纯水15-25％。本发明通过聚丙烯酸钠、水合肼、有机酸、表面活性剂和除锈助剂,能够显著提高低压锅炉清洗剂的清洗效果,有效降低低压锅炉清洗剂的腐蚀强度,能够避免对低压锅炉造成腐蚀,还能够提高低压锅炉的防腐性能,提高低压锅炉清洗剂的除锈性能,且还能够抑制水垢的形成,功能性更佳,该低压锅炉清洗剂中无磷,可直接进行排放,更符合环保的要求。(The invention belongs to the technical field of low-pressure boiler cleaning agents, and particularly relates to a non-phosphoric acid series medium and low-pressure boiler cleaning agent and a preparation method thereof, wherein the non-phosphoric acid series medium and low-pressure boiler cleaning agent comprises the following components in mass concentration: 20-40% of liquid alkali, 10-20% of sodium polyacrylate, 5-8% of hydrazine hydrate, 30-50% of organic acid, 1-5% of surfactant, 5-8% of corrosion inhibitor, 2-4% of rust removal assistant, 1-3% of preservative and 15-25% of pure water. According to the low-pressure boiler cleaning agent, the cleaning effect of the low-pressure boiler cleaning agent can be remarkably improved through the sodium polyacrylate, the hydrazine hydrate, the organic acid, the surfactant and the rust removal auxiliary agent, the corrosion strength of the low-pressure boiler cleaning agent is effectively reduced, the low-pressure boiler can be prevented from being corroded, the corrosion resistance of the low-pressure boiler can be improved, the rust removal performance of the low-pressure boiler cleaning agent is improved, the formation of scale can be inhibited, the low-pressure boiler cleaning agent is better in functionality, phosphorus is not contained in the low-pressure boiler cleaning agent, the low-pressure boiler cleaning agent can.)

1. A non-phosphoric acid series medium and low pressure boiler cleaning agent is characterized in that: the non-phosphoric acid series medium and low pressure boiler cleaning agent comprises the following components in mass concentration: 20-40% of liquid alkali, 10-20% of sodium polyacrylate, 5-8% of hydrazine hydrate, 30-50% of organic acid, 1-5% of surfactant, 5-8% of corrosion inhibitor, 2-4% of rust removal assistant, 1-3% of preservative and 15-25% of pure water.

2. The non-phosphoric acid series medium and low pressure boiler cleaning agent as claimed in claim 1, wherein: the non-phosphoric acid series medium and low pressure boiler cleaning agent comprises the following components in mass concentration: 25% of liquid alkali, 15% of sodium polyacrylate, 6% of hydrazine hydrate, 45% of organic acid, 4% of surfactant, 6% of corrosion inhibitor, 3% of rust removal assistant, 2% of preservative and 20% of pure water.

3. The non-phosphoric acid series medium and low pressure boiler cleaning agent as claimed in claim 1, wherein: the organic acid is any one or more of adipic acid, acrylic acid, sulfamic acid, citric acid, sodium citrate, tartaric acid, ammonium citrate, adipic acid and sodium formate.

4. The non-phosphoric acid series medium and low pressure boiler cleaning agent as claimed in claim 1, wherein: the surfactant is one or more of sodium dodecyl benzene sulfonate, alkylbenzene sulfonate, alkyl sulfonate, fatty alcohol polyoxyethylene ether and nonylphenol polyoxyethylene ether.

5. The non-phosphoric acid series medium and low pressure boiler cleaning agent as claimed in claim 1, wherein: the corrosion inhibitor is any one or more of benzotriazole amine, mercapto benzotriazole amine, benzalkonium bromide, imidazoline, thiourea, dodecyl dimethyl ammonium chloride, dodecyl bis-hydroxyethyl methyl ammonium chloride and dodecyl trimethyl ammonium chloride.

6. The non-phosphoric acid series medium and low pressure boiler cleaning agent as claimed in claim 1, wherein: the rust removal auxiliary agent is a mixture consisting of sodium borate, sodium dodecyl sulfate and triethanolamine.

7. The non-phosphoric acid series medium and low pressure boiler cleaning agent as claimed in claim 1, wherein: the preservative is one or more of 5-chloro-2-methyl-4-isothiazolin-3-one, propyl p-hydroxybenzoate, butyl p-hydroxybenzoate and methylisothiazolinone.

8. The preparation method of the non-phosphoric acid series medium-low pressure boiler cleaning agent according to any one of claims 1 to 7, characterized by comprising the following steps:

s1: liquid alkali, sodium polyacrylate, hydrazine hydrate, organic acid, surfactant, corrosion inhibitor, rust removal assistant, preservative and pure water with components with corresponding mass concentrations are respectively weighed according to the proportion.

S2: and mixing the weighed liquid caustic soda, sodium polyacrylate and hydrazine hydrate, adding pure water, and uniformly stirring at the rotating speed of 200-250 r/min to obtain a mixture A.

S3: and mixing the weighed organic acid, the surfactant, the corrosion inhibitor, the rust removal auxiliary agent and the preservative, then adding the rest pure water, and uniformly stirring at the rotating speed of 200-250 r/min to obtain a mixture B.

S4: and mixing the mixture A and the mixture B, and uniformly stirring at the rotating speed of 200-250 r/min to obtain the cleaning agent.

Technical Field

The invention relates to the technical field of low-pressure boiler cleaning agents, in particular to a non-phosphoric acid series medium-pressure and low-pressure boiler cleaning agent and a preparation method thereof.

Background

In daily industrial production, boiler water is continuously circulated and concentrated when in use, mineral content in the water is continuously increased, so that scaling on the inner wall of a boiler is caused, particularly in some areas with high water hardness, the concentration of calcium and magnesium ions is higher, the scaling has serious influence on the boiler, the scaling can obstruct heat conduction and greatly reduce heat efficiency, and meanwhile, the existence of a large amount of scaling can also cause local overheating of equipment in the heating process to cause damage of the equipment.

For example, chinese patent application No.: CN201910668811.1 discloses a cleaning agent for removing boiler silica scale, relating to boiler water treatment. The boiler silica scale cleaning agent comprises water, polycarboxylic acid, glycolic acid, a surfactant, a corrosion inhibitor and DTPA ammonium salt. The specific weight of each component is as follows: 10-15% of polycarboxylic acid, 40-50% of glycolic acid, 1-2% of surfactant, 0.5-1% of corrosion inhibitor, 2-3% of diethylenetriamine pentaacetic acid amine salt and the balance of water. The preparation method comprises the following steps: and (3) sequentially adding water, polycarboxylic acid, glycolic acid, a surfactant, a corrosion inhibitor and DTPA ammonium salt into a container according to a ratio, and stirring at room temperature for 10-15 minutes to obtain the product. The mode has strong once-dissolved permeation stripping effect on the silica scale. However, the boiler cleaning agent has high corrosivity and poor cleaning effect, and the boiler cleaning agent in the prior art does not have good corrosion resistance, is inconvenient to effectively clean rusty materials in the boiler, and is not beneficial to environmental protection.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a non-phosphoric acid series medium and low pressure boiler cleaning agent and a preparation method thereof, and solves the problems that the low pressure boiler cleaning agent in the prior art is easy to pollute water resources, has high corrosion strength, does not have good anti-corrosion performance and is inconvenient to clean rusty substances in a boiler.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a non-phosphoric acid series medium and low pressure boiler cleaning agent comprises the following components in mass concentration: 20-40% of liquid alkali, 10-20% of sodium polyacrylate, 5-8% of hydrazine hydrate, 30-50% of organic acid, 1-5% of surfactant, 5-8% of corrosion inhibitor, 2-4% of rust removal assistant, 1-3% of preservative and 15-25% of pure water.

As a preferable technical scheme of the invention, the non-phosphoric acid series medium and low pressure boiler cleaning agent comprises the following components in mass concentration: 25% of liquid alkali, 15% of sodium polyacrylate, 6% of hydrazine hydrate, 45% of organic acid, 4% of surfactant, 6% of corrosion inhibitor, 3% of rust removal assistant, 2% of preservative and 20% of pure water.

As a preferred technical scheme of the invention, the organic acid is any one or more of adipic acid, acrylic acid, sulfamic acid, citric acid, sodium citrate, tartaric acid, ammonium citrate, adipic acid and sodium formate.

As a preferable technical scheme of the invention, the surfactant is one or more of sodium dodecyl benzene sulfonate, alkylbenzene sulfonate, alkyl sulfonate, fatty alcohol-polyoxyethylene ether and nonylphenol polyoxyethylene ether.

As a preferred technical scheme of the invention, the corrosion inhibitor is any one or more of benzotriazole amine, mercaptobenzotriazole amine, benzalkonium bromide, imidazoline, thiourea, dodecyl dimethyl ammonium chloride, dodecyl bis-hydroxyethyl methyl ammonium chloride and dodecyl trimethyl ammonium chloride.

As a preferred technical scheme of the invention, the rust removal auxiliary agent is a mixture consisting of sodium borate, sodium dodecyl sulfate and triethanolamine.

As a preferable technical scheme of the invention, the preservative is one or more of 5-chloro-2-methyl-4-isothiazolin-3-one, propyl p-hydroxybenzoate, butyl p-hydroxybenzoate and methylisothiazolinone.

The invention also provides a preparation method of the non-phosphoric acid series medium and low pressure boiler cleaning agent, which comprises the following steps:

s1: liquid alkali, sodium polyacrylate, hydrazine hydrate, organic acid, surfactant, corrosion inhibitor, rust removal assistant, preservative and pure water with components with corresponding mass concentrations are respectively weighed according to the proportion.

S2: and mixing the weighed liquid caustic soda, sodium polyacrylate and hydrazine hydrate, adding pure water, and uniformly stirring at the rotating speed of 200-250 r/min to obtain a mixture A.

S3: and mixing the weighed organic acid, the surfactant, the corrosion inhibitor, the rust removal auxiliary agent and the preservative, then adding the rest pure water, and uniformly stirring at the rotating speed of 200-250 r/min to obtain a mixture B.

S4: and mixing the mixture A and the mixture B, and uniformly stirring at the rotating speed of 200-250 r/min to obtain the cleaning agent.

(III) advantageous effects

Compared with the prior art, the invention provides a non-phosphoric acid series medium and low pressure boiler cleaning agent and a preparation method thereof, and the non-phosphoric acid series medium and low pressure boiler cleaning agent has the following beneficial effects:

1. according to the non-phosphoric acid series medium and low pressure boiler cleaning agent and the preparation method thereof, scale in the low pressure boiler can be effectively cleaned through the organic acid, the sodium polyacrylate and the surfactant, phosphorus is not contained in the low pressure boiler cleaning agent, the low pressure boiler cleaning agent can be directly discharged, the requirement of environmental protection is met, meanwhile, the corrosivity of the low pressure boiler cleaning agent is not high, the low pressure boiler is effectively prevented from being damaged, and the service life of the low pressure boiler is prolonged.

2. According to the non-phosphoric acid series medium and low pressure boiler cleaning agent and the preparation method thereof, the hydrazine hydrate, the corrosion inhibitor, the rust removal auxiliary agent and the preservative can inhibit the formation of scale, have the effects of corrosion prevention and tank mud dispersion, remarkably improve the corrosion resistance of the low pressure boiler, and can effectively remove iron oxide in the low pressure boiler, so that the cleaning effect is better.

Drawings

FIG. 1 is a flow chart of the preparation method of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1, the present invention provides the following technical solutions: a non-phosphoric acid series medium and low pressure boiler cleaning agent comprises the following components by mass concentration: 20-40% of liquid alkali, 10-20% of sodium polyacrylate, 5-8% of hydrazine hydrate, 30-50% of organic acid, 1-5% of surfactant, 5-8% of corrosion inhibitor, 2-4% of rust removal assistant, 1-3% of preservative and 15-25% of pure water.

In the embodiment, the liquid alkali can adjust the PH in the water, and can dissolve sodium polyacrylate by combining with calcium, magnesium, iron and other ions in the water, the sodium polyacrylate forms gelation precipitation with calcium hydroxide, magnesium hydroxide and the like, can inhibit the formation of scales such as calcium carbonate and the like, can disperse the deposition of the scales such as calcium carbonate and the like, a deoxidizer, oxygen in a boiler and corrosion are removed, hydrazine hydrate is used as the deoxidizer, oxygen in the boiler is removed, corrosion is reduced, and the scale inhibitor also has the scale prevention function, has good dispersion effect on substances such as oxidizing liquid and the like, organic acid can disperse the scales in the boiler, is convenient to clean the scales in the low-pressure boiler, the surfactant can increase wettability, emulsibility and foamability, is convenient to disperse the scales which are not easy to dissolve in the low-pressure boiler, the corrosion inhibitor can avoid the corrosion in the low-pressure boiler, and can avoid the damage to the low-pressure boiler, the rust remover can further improve the rust removing capability of the cleaning agent, the preservative can further improve the corrosion resistance, so that the cleaning agent has better function, and the cleaning agent is phosphorus-free, can directly cook rice and better meets the requirement of environmental protection.

Specifically, the cleaning agent comprises the following components in mass concentration: 25% of liquid alkali, 15% of sodium polyacrylate, 6% of hydrazine hydrate, 45% of organic acid, 4% of surfactant, 6% of corrosion inhibitor, 3% of rust removal assistant, 2% of preservative and 20% of pure water.

In the embodiment, the non-phosphoric acid series medium and low pressure boiler cleaning agent is convenient to prepare, the functions of the non-phosphoric acid series medium and low pressure boiler cleaning agent are improved, the preparation is convenient, the cleaning capability of the non-phosphoric acid series medium and low pressure boiler cleaning agent is obviously improved, and the non-phosphoric acid series medium and low pressure boiler cleaning agent has good corrosion resistance.

Specifically, the organic acid is any one or more of adipic acid, acrylic acid, sulfamic acid, citric acid, sodium citrate, tartaric acid, ammonium citrate, adipic acid and sodium formate.

In the embodiment, the organic acid is weaker than the strong acid, so that the phenomenon of corrosion to the low-pressure boiler is not easy to occur, and the scale in the low-pressure boiler can be effectively cleaned but is not easy to damage the low-pressure boiler.

Specifically, the surfactant is one or more of sodium dodecyl benzene sulfonate, alkylbenzene sulfonate, alkyl sulfonate, fatty alcohol polyoxyethylene ether and nonylphenol polyoxyethylene ether.

In this embodiment, the surfactant is a substance that can significantly change the interface state of the solution system by adding a small amount of the surfactant, and can enhance the wettability, emulsibility, and foamability of the scale that is not easily dispersed in the low-pressure boiler, thereby effectively cleaning the scale in the low-pressure boiler and improving the cleaning effect.

Specifically, the corrosion inhibitor is any one or more of benzotriazole amine, mercapto benzotriazole amine, benzalkonium bromide, imidazoline, thiourea, dodecyl dimethyl ammonium chloride, dodecyl bis-hydroxyethyl methyl ammonium chloride and dodecyl trimethyl ammonium chloride.

In this embodiment, the corrosion inhibitor can avoid low-pressure boiler to receive the corruption at abluent in-process, can carry out good anticorrosive to low-pressure boiler, improves low-pressure boiler's corrosion protection performance, improves low-pressure boiler's life.

Specifically, the rust removing auxiliary agent is a mixture consisting of sodium borate, sodium dodecyl sulfate and triethanolamine.

In the embodiment, the rust removal auxiliary agent can assist hydrazine hydrate to disperse substances such as iron oxide and the like, the rust removal effect is better, and the rust removal auxiliary agent and the hydrazine hydrate are matched with each other for use, so that the cleaning effect of the cleaning agent is improved.

Specifically, the antiseptic is one or more of 5-chloro-2-methyl-4-isothiazolin-3-one, propyl p-hydroxybenzoate, butyl p-hydroxybenzoate and methylisothiazolinone.

In this embodiment, anticorrosive can further improve low pressure boiler's corrosion resisting property to can carry out good protection to low pressure boiler, improve the functional characteristic of low pressure boiler cleaner.

The invention provides a preparation method of a non-phosphoric acid series medium and low pressure boiler cleaning agent, which comprises the following steps:

s1: liquid alkali, sodium polyacrylate, hydrazine hydrate, organic acid, surfactant, corrosion inhibitor, rust removal assistant, preservative and pure water with components with corresponding mass concentrations are respectively weighed according to the proportion.

S2: and mixing the weighed liquid caustic soda, sodium polyacrylate and hydrazine hydrate, adding pure water, and uniformly stirring at the rotating speed of 200-250 r/min to obtain a mixture A.

S3: and mixing the weighed organic acid, the surfactant, the corrosion inhibitor, the rust removal auxiliary agent and the preservative, then adding the rest pure water, and uniformly stirring at the rotating speed of 200-250 r/min to obtain a mixture B.

S4: and mixing the mixture A and the mixture B, and uniformly stirring at the rotating speed of 200-250 r/min to obtain the cleaning agent.

Example 2

A non-phosphoric acid series medium and low pressure boiler cleaning agent comprises the following components by mass concentration: 25% of liquid alkali, 6% of hydrazine hydrate, 45% of organic acid, 4% of surfactant, 6% of corrosion inhibitor, 3% of rust removal assistant, 2% of preservative and 20% of pure water.

The specific preparation method is the same as in example 1.

Example 3

A non-phosphoric acid series medium and low pressure boiler cleaning agent comprises the following components by mass concentration: 25% of liquid alkali, 15% of sodium polyacrylate, 45% of organic acid, 4% of surfactant, 6% of corrosion inhibitor, 3% of rust removal assistant, 2% of preservative and 20% of pure water.

The specific preparation method is the same as in example 1.

Example 4

A non-phosphoric acid series medium and low pressure boiler cleaning agent comprises the following components by mass concentration: 25% of liquid alkali, 15% of sodium polyacrylate, 6% of hydrazine hydrate, 45% of organic acid, 4% of surfactant, 3% of rust removal assistant, 2% of preservative and 20% of pure water.

The specific preparation method is the same as in example 1.

Example 5

A non-phosphoric acid series medium and low pressure boiler cleaning agent comprises the following components by mass concentration: 25% of liquid alkali, 15% of sodium polyacrylate, 6% of hydrazine hydrate, 45% of organic acid, 4% of surfactant, 6% of corrosion inhibitor, 3% of rust removal assistant and 20% of pure water.

The specific preparation method is the same as in example 1.

Example 6

A non-phosphoric acid series medium and low pressure boiler cleaning agent comprises the following components by mass concentration: 25% of liquid alkali, 15% of sodium polyacrylate, 6% of hydrazine hydrate, 45% of organic acid, 4% of surfactant, 6% of corrosion inhibitor, 2% of preservative and 20% of pure water.

The specific preparation method is the same as in example 1.

The table shows that the sodium polyacrylate can effectively reduce the concentration of calcium ions, so that the boiler can be effectively cleaned, the cleaning effect of the cleaning agent is improved, the corrosion inhibitor can obviously improve the corrosion resistance of the boiler, the damage to the boiler is avoided, the preservative has a good corrosion prevention effect, the rust removal auxiliary agent can improve the rust removal effect of the cleaning agent, and the cleaning effect of the cleaning agent is better.

The working principle and the using process of the invention are as follows: respectively weighing liquid alkali, sodium polyacrylate, hydrazine hydrate, organic acid, surfactant, corrosion inhibitor, rust removal assistant, preservative and pure water with corresponding mass concentration components according to the proportion, then mixing the weighed liquid alkali, sodium polyacrylate and hydrazine hydrate, then adding the pure water, uniformly stirring at the rotating speed of 200-250 r/min to prepare a mixture A, then mixing the weighed organic acid, surfactant, corrosion inhibitor, rust removal assistant and preservative, then adding the rest pure water, uniformly stirring at the rotating speed of 200-250 r/min to prepare a mixture B, then mixing the mixture A and the mixture B, and uniformly stirring at the rotating speed of 200-250 r/min to obtain the cleaning agent.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.