CN115948181A - One-step descaling agent for iron-based element and oxygen group element compounds and preparation method thereof - Google Patents
One-step descaling agent for iron-based element and oxygen group element compounds and preparation method thereof Download PDFInfo
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- CN115948181A CN115948181A CN202211542611.XA CN202211542611A CN115948181A CN 115948181 A CN115948181 A CN 115948181A CN 202211542611 A CN202211542611 A CN 202211542611A CN 115948181 A CN115948181 A CN 115948181A
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Abstract
The invention discloses a one-step descaling agent for iron-based elements and oxygen-group elements and a preparation method thereof, wherein a dispersing agent, a chelating agent, a complexing agent, a wetting penetrating agent, a temperature-resistant corrosion inhibitor, a normal-temperature corrosion inhibitor, an iron ion concealing agent and water are used as raw materials, the normal-temperature corrosion inhibitor and the temperature-resistant corrosion inhibitor are placed in a special stainless steel barrel according to the weight ratio at the environmental temperature of more than 5 ℃, water is added for dilution and are uniformly mixed and stirred to obtain a mixed solution, the mixed solution is stood for 30 minutes with no bubbles and a stable state as an initial point, the rest raw materials are added into the stood mixed solution according to the weight ratio in a non-sequential manner, water is added, and the mixed solution is slowly and uniformly stirred to obtain a finished descaling agent, and the obtained liquid is a finished descaling agent.
Description
Technical Field
The invention belongs to the technical field of descaling agents, and particularly relates to a one-step descaling agent of iron-based element and oxygen group element compounds and a preparation method thereof.
Background
Along with the increase of the proportion of sulfur-containing and high-sulfur crude oil which is refined and imported in China, when the sulfur content in the crude oil reaches more than 1 percent, the refining equipment and pipelines are blocked by iron oxide and iron sulfide scales, so that the emergency shutdown or the reduction treatment of the device is caused, or the unqualified oil refining products are frequently generated, and even the most advanced oil refining equipment in the world is frequently adopted, and the scale formation of the equipment is generated in a wide range.
At present, the equipment and the pipeline of domestic refining enterprises are easy to generate the scaling problem mainly comprising oxygen family iron-based oxides and sulfides during the running process of refining inferior crude oil, once the equipment and the pipeline generate scaling blockage, the running production capacity of the device is reduced, the product is unqualified, even the safe and stable running of the whole device is influenced, the potential safety hazards of fire and explosion caused by the sealing leakage of certain units of the device due to serious even over-high pressure are easily caused, and the equipment and the pipeline become a great safety hazard problem seriously influencing refining enterprises for refining sulfur-containing crude oil, the method is characterized in that an enterprise goes through temporary shutdown of devices of certain refining enterprises, the equipment cannot return to the position due to displacement of scaling substances in the equipment, the operation time of the whole plant after maintenance is affected, the condition that one day of loss is up to tens of millions of times is delayed, and the small problem becomes a huge problem which hinders the operation of the whole plant.
Disclosure of Invention
The invention aims to provide a one-step descaling agent for iron-based elements and oxygen-group elements and a preparation method thereof, and the descaling agent prepared by the method can effectively remove chemical and electrochemical corrosion oxygen congeneric elements, namely iron oxide, ferrous oxide, ferric sulfide and ferrous sulfide composite iron-based oxygen-group element scaling substances generated by oxygen, sulfur and iron, so as to solve the problems in the background technology.
In order to realize the purpose, the invention adopts the following technical scheme:
a one-step method scale remover for iron-based element and oxygen group element compounds comprises the following raw materials in percentage by mass: 10-15% of dispersing agent, 4-6% of chelating agent, 4-6% of complexing agent, 0.5-1.0% of wetting penetrating agent, 1-2% of temperature-resistant corrosion inhibitor, 2-4% of normal temperature corrosion inhibitor, 2-4% of iron ion masking agent and the balance of water.
Preferably, the material comprises the following raw materials in percentage by mass: 10% of dispersing agent, 4% of chelating agent, 4% of complexing agent, 0.5% of wetting penetrant, 1% of temperature-resistant corrosion inhibitor, 2% of normal-temperature corrosion inhibitor, 2% of iron ion masking agent and the balance of water.
Preferably, the material comprises the following raw materials in percentage by mass: 12% of dispersing agent, 5% of chelating agent, 5% of complexing agent, 0.7% of wetting penetrant, 1.5% of temperature-resistant corrosion inhibitor, 3% of normal-temperature corrosion inhibitor, 3% of iron ion masking agent and the balance of water.
Preferably, the material comprises the following raw materials in percentage by mass: 15% of dispersing agent, 6% of chelating agent, 6% of complexing agent, 1.0% of wetting penetrating agent, 2% of temperature-resistant corrosion inhibitor, 4% of normal temperature corrosion inhibitor, 4% of iron ion concealing agent and the balance of water.
Preferably, the dispersant is provided as one or two combinations of a polyvinyl fatty alcohol ether and an imidazoline derivative with a surfactant.
Preferably, the chelating agent is provided as a combination of at least two of diamine tetraacetic acid, glycolic acid, formaldehyde, aminotrimethylene phosphoric acid.
Preferably, the complexing agent is set as two or three combinations of citric acid, oxalic acid and hexamethylenetetramine.
Preferably, the wetting penetrant is set to be an ethylene oxide condensate, the temperature-resistant corrosion inhibitor is set to be aminotrimethylene phosphoric acid, and the normal-temperature corrosion inhibitor is set to be one, two or three of a thiourea derivative, urotropin and a pyridine derivative.
Preferably, the iron ion sequestering agent is one or three combinations of citric acid, sodium gluconate and sodium sulfite, and the water is one of raw water, tap water or desalted water.
Based on the one-step method scale remover for the iron-based element and the oxygen group element compound, the invention also provides a preparation method of the one-step method scale remover for the iron-based element and the oxygen group element compound, which comprises the following steps:
s1, preparing the following raw materials: dispersing agent, chelating agent, complexing agent, wetting penetrant, temperature-resistant corrosion inhibitor, normal-temperature corrosion inhibitor, iron ion masking agent and water;
s2, placing the normal-temperature corrosion inhibitor and the temperature-resistant corrosion inhibitor in a special stainless steel barrel according to the weight ratio at the ambient temperature of more than 5 ℃, adding water for dilution, and uniformly mixing and stirring to obtain a mixed solution;
s3, standing the mixed solution for 30 minutes by taking the stable state without generating bubbles as an initial point;
and S4, adding a dispersing agent, a chelating agent, a complexing agent, a wetting penetrating agent and an iron ion concealing agent into the standing mixed solution according to the weight ratio in a non-sequential manner, supplementing water and slowly and uniformly stirring to obtain a liquid as a finished product of the descaling agent.
Compared with the prior art, the one-step method scale remover for iron-based element and oxygen group element compounds and the preparation method thereof provided by the invention have the following advantages:
the invention takes dispersant, chelating agent, complexing agent, wetting penetrant, temperature-resistant corrosion inhibitor, normal temperature corrosion inhibitor, iron ion masking agent and water as raw materials, the normal temperature corrosion inhibitor and the temperature-resistant corrosion inhibitor are placed in a special stainless steel barrel according to the weight ratio at the environmental temperature of more than 5 ℃, water is added for dilution, and the mixture is mixed and stirred uniformly to obtain a mixed solution, the mixed solution is stood for 30 minutes with no bubble generation and a stable state as a starting point, the dispersant, the chelating agent, the complexing agent, the wetting penetrant and the iron ion masking agent are added into the stood mixed solution according to the weight ratio in no sequence, water is supplemented, and the mixture is slowly stirred uniformly to obtain a liquid as a finished product of the descaling agent, and the descaling agent prepared by the method can effectively remove chemical and electrochemical corrosion oxygen elements-oxygen of the same family elements and iron oxide, ferrous oxide, ferric sulfide and ferrous sulfide composite iron-based oxygen family element scaling substances generated by sulfur and iron.
Drawings
FIG. 1 is a block flow diagram 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. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. 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
The invention provides a one-step method scale remover for iron-based element and oxygen group element compounds, which comprises the following raw materials in percentage by mass: 10% of dispersing agent, 4% of chelating agent, 4% of complexing agent, 0.5% of wetting penetrant, 1% of temperature-resistant corrosion inhibitor, 2% of normal-temperature corrosion inhibitor, 2% of iron ion concealing agent and the balance of water;
wherein the dispersant is provided by one or two combinations of polyvinyl fatty alcohol ether and imidazoline derivatives with surfactant;
the chelating agent is provided as a combination of at least two of diamine tetraacetic acid, glycolic acid, formaldehyde, aminotrimethylene phosphate.
The complexing agent is set to be two or three combinations of citric acid, oxalic acid and hexamethylenetetramine.
The wetting penetrating agent is set to be an ethylene oxide condensate, the temperature-resistant corrosion inhibitor is set to be aminotrimethylene phosphoric acid, and the normal-temperature corrosion inhibitor is set to be one of, two of or three of a thiourea derivative, urotropine and a pyridine derivative.
The iron ion masking agent is one or three combination of citric acid, sodium gluconate and sodium sulfite, and the water is one of raw water, tap water or desalted water.
Based on the one-step method scale remover for the iron-based element and the oxygen group element compound, the invention also provides a preparation method of the one-step method scale remover for the iron-based element and the oxygen group element compound, which comprises the following steps:
s1, preparing the following raw materials: dispersing agent, chelating agent, complexing agent, wetting penetrant, temperature-resistant corrosion inhibitor, normal-temperature corrosion inhibitor, iron ion masking agent and water;
s2, placing the normal-temperature corrosion inhibitor and the temperature-resistant corrosion inhibitor in a special stainless steel barrel according to the weight ratio at the ambient temperature of more than 5 ℃, adding water for dilution, and mixing and stirring uniformly to obtain a mixed solution; the normal-temperature corrosion inhibitor and the temperature-resistant corrosion inhibitor are not added sequentially when being added;
s3, standing the mixed solution for 30 minutes by taking the mixed solution which does not generate bubbles and is in a stable state as an initial point;
and S4, adding a dispersing agent, a chelating agent, a complexing agent, a wetting penetrating agent and an iron ion concealing agent into the standing mixed solution according to the weight ratio in a non-sequential manner, supplementing water and slowly and uniformly stirring to obtain a liquid as a finished product of the descaling agent.
Example 2
The same parts are not repeated and described repeatedly, and different from the embodiment 1, the composition comprises the following raw materials in percentage by mass: 12% of dispersing agent, 5% of chelating agent, 5% of complexing agent, 0.7% of wetting penetrant, 1.5% of temperature-resistant corrosion inhibitor, 3% of normal-temperature corrosion inhibitor, 3% of iron ion masking agent and the balance of water.
Example 3
The same parts are not repeated and described repeatedly, and different from the embodiment 1, the composition comprises the following raw materials in percentage by mass: 15% of dispersing agent, 6% of chelating agent, 6% of complexing agent, 1.0% of wetting penetrant, 2% of temperature-resistant corrosion inhibitor, 4% of normal-temperature corrosion inhibitor, 4% of iron ion masking agent and the balance of water.
The detergent prepared according to the raw material ratio and the preparation method provided in example 1 was subjected to quality detection, and the detection results were as follows:
the detection shows that the scale remover is nontoxic and harmless, does not produce waste gas and harmful chemical substances, has no harm to human bodies, belongs to a green environment-friendly product, and has higher oil dispersion capacity at the temperature of more than 50 ℃.
When the prepared descaling agent is used, the descaling agent is put into a device and pipeline circulation system, steam is heated to 60 ℃, chemical and electrochemical corrosion oxygen congeneric element-oxygen and sulfur generated by material media in the oil refining process and iron oxide, ferrous oxide, ferric sulfide and ferrous sulfide composite iron-based oxygen group element scaling substances can be generated by circulation, and the scale layer is loosened and the oxygen group element iron scale is decomposed through the actions of chelation, complexation, dispersion, infiltration, permeation and the like until the working purpose of thoroughly removing the composite oxygen group iron-based element scale layer is achieved.
In conclusion, the descaling agent prepared by the method can effectively remove the chemical and electrochemical corrosion oxygen congeneric element-oxygen generated by the material medium and the ferric oxide, ferrous oxide, ferric sulfide and ferrous sulfide composite iron-based oxygen congeneric element scaling substances generated by sulfur and iron.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions and improvements to part of the technical features of the foregoing embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An iron-based element and oxygen group element compound one-step method scale remover is characterized in that: the composite material comprises the following raw materials in percentage by mass: 10-15% of dispersing agent, 4-6% of chelating agent, 4-6% of complexing agent, 0.5-1.0% of wetting penetrating agent, 1-2% of temperature-resistant corrosion inhibitor, 2-4% of normal temperature corrosion inhibitor, 2-4% of iron ion masking agent and the balance of water.
2. The one-step descaling agent of iron-based element and chalcogen compound according to claim 1, wherein: the composite material comprises the following raw materials in percentage by mass: 10% of dispersing agent, 4% of chelating agent, 4% of complexing agent, 0.5% of wetting penetrant, 1% of temperature-resistant corrosion inhibitor, 2% of normal-temperature corrosion inhibitor, 2% of iron ion masking agent and the balance of water.
3. The one-step descaling agent for iron-based element and chalcogen compounds according to claim 1, wherein the descaling agent comprises: the composite material comprises the following raw materials in percentage by mass: 12% of dispersing agent, 5% of chelating agent, 5% of complexing agent, 0.7% of wetting penetrant, 1.5% of temperature-resistant corrosion inhibitor, 3% of normal-temperature corrosion inhibitor, 3% of iron ion masking agent and the balance of water.
4. The one-step descaling agent of iron-based element and chalcogen compound according to claim 1, wherein: the composite material comprises the following raw materials in percentage by mass: 15% of dispersing agent, 6% of chelating agent, 6% of complexing agent, 1.0% of wetting penetrant, 2% of temperature-resistant corrosion inhibitor, 4% of normal-temperature corrosion inhibitor, 4% of iron ion masking agent and the balance of water.
5. The one-step descaling agent of iron-based element and chalcogen compound according to claim 1, wherein: the dispersing agent is provided as one or two combinations of polyethylene fatty alcohol ether and imidazoline derivatives with surfactants.
6. The one-step descaling agent for iron-based element and chalcogen compounds according to claim 1, wherein the descaling agent comprises: the chelating agent is provided as a combination of at least two of diamine tetraacetic acid, glycolic acid, formaldehyde, aminotrimethylene phosphate.
7. The one-step descaling agent of iron-based element and chalcogen compound according to claim 1, wherein: the complexing agent is set to be two or three combinations of citric acid, oxalic acid and hexamethylenetetramine.
8. The one-step descaling agent of iron-based element and chalcogen compound according to claim 1, wherein: the wetting penetrating agent is set to be an ethylene oxide condensate, the temperature-resistant corrosion inhibitor is set to be aminotrimethylene phosphoric acid, and the normal-temperature corrosion inhibitor is set to be one of, two of or three of a thiourea derivative, urotropine and a pyridine derivative.
9. The one-step descaling agent for iron-based element and chalcogen compounds according to claim 1, wherein the descaling agent comprises: the iron ion masking agent is one or three combination of citric acid, sodium gluconate and sodium sulfite, and the water is one of raw water, tap water or desalted water.
10. The method for preparing the one-step descaling agent for iron-based elements and chalcogen compounds according to any one of claims 1 to 9, wherein the descaling agent comprises: the method comprises the following steps:
s1, preparing the following raw materials: dispersing agent, chelating agent, complexing agent, wetting penetrant, temperature-resistant corrosion inhibitor, normal-temperature corrosion inhibitor, iron ion masking agent and water;
s2, placing the normal-temperature corrosion inhibitor and the temperature-resistant corrosion inhibitor in a special stainless steel barrel according to the weight ratio at the ambient temperature of more than 5 ℃, adding water for dilution, and uniformly mixing and stirring to obtain a mixed solution;
s3, standing the mixed solution for 30 minutes by taking the stable state without generating bubbles as an initial point;
and S4, adding a dispersing agent, a chelating agent, a complexing agent, a wetting penetrating agent and an iron ion concealing agent into the standing mixed solution according to the weight ratio in a non-sequential manner, supplementing water and slowly and uniformly stirring to obtain a liquid as a finished product of the descaling agent.
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| CN202211542611.XA CN115948181A (en) | 2022-12-02 | 2022-12-02 | One-step descaling agent for iron-based element and oxygen group element compounds and preparation method thereof |
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| CN202211542611.XA CN115948181A (en) | 2022-12-02 | 2022-12-02 | One-step descaling agent for iron-based element and oxygen group element compounds and preparation method thereof |
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