CN111422999A - Organic stabilizer for water quality of low-medium pressure drum boiler and preparation method thereof - Google Patents
Organic stabilizer for water quality of low-medium pressure drum boiler and preparation method thereof Download PDFInfo
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- CN111422999A CN111422999A CN202010354610.7A CN202010354610A CN111422999A CN 111422999 A CN111422999 A CN 111422999A CN 202010354610 A CN202010354610 A CN 202010354610A CN 111422999 A CN111422999 A CN 111422999A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/105—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances combined with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
- C02F5/125—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen combined with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
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- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses an organic stabilizer for water quality of a low-medium pressure drum boiler, which comprises the following raw materials in percentage by weight: 1-10% of hexamethylenetetramine, 1-10% of sodium metasilicate, 1-5% of sodium molybdate dihydrate, 1-10% of sodium bicarbonate, 1-5% of polyethylene glycol, 1-6% of laurylamine polyoxyethylene ether, 1-10% of methyldiethanolamine, and the balance of deionized water; the organic stabilizer for the water quality of the low-medium pressure drum boiler adopts a phosphorus-free formula, so that not only can the corrosion and scaling of the pipe wall be avoided, the energy is saved, but also the working strength of operators can be reduced.
Description
Technical Field
The invention relates to an organic stabilizer for water quality of a low-medium pressure drum boiler and a preparation method thereof.
Background
At present, domestic low and medium pressure drum boilers are usually treated by trisodium phosphate, and the using mechanism is that phosphate radical can be combined with metal ions in water to generate soft water slag, and the soft water slag is discharged out of the boiler body along with continuous discharge and fixed discharge of sewage of the boiler so as to maintain the qualification of water and steam indexes, thereby ensuring the stable operation of the low and medium pressure drum boilers.
Due to the low price of trisodium phosphate products, phosphate treatment technology has been applied for decades. With its widespread use, it has some technical performance limitations, with the following drawbacks:
1) the sewage discharge amount is large, and the heat energy waste is serious;
2) the trisodium phosphate is adopted to treat the drum furnace water, so that water slag is formed, phosphate scale is easily formed, and the wall of the drum furnace water is easily damaged along with scale corrosion; meanwhile, trisodium phosphate belongs to inorganic salts and is a main source causing high salt content of furnace water, the high salt content of the furnace water can cause the problem of steam entrainment, and sodium, silicon dioxide and the like carried by steam are deposited on blades of a steam turbine to influence output and potential safety hazards;
3) phosphate, due to its physical and chemical properties of the product itself, increases in solubility at low loads; when the load is high, the solubility is reduced and precipitated, and the precipitate is attached to the pipe wall; scale such as iron, copper oxide, silicon dioxide and the like cannot be effectively inhibited; the boiler body is only antiseptic to a certain degree, and the steam condensate system is not protected;
4) when the addition amount of the trisodium phosphate is insufficient, metal acid corrosion is easily caused, and when the addition amount is too high, alkali embrittlement corrosion is easily caused; the manual control has longer time delay, so that the frequent fluctuation of the indexes of the furnace water and the steam is larger, and the control is difficult to be stable; the working intensity of operators is increased, and the requirements on the responsibility and technical level of the operators are strict.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an organic stabilizer for low-medium pressure drum boiler water quality, which adopts a phosphorus-free formula, can avoid corrosion and scaling of pipe walls, save energy and reduce the working strength of operators, and a preparation method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an organic stabilizer for water quality of a low-medium pressure drum boiler comprises the following raw materials in percentage by weight: 1-10% of hexamethylenetetramine, 1-10% of sodium metasilicate, 1-5% of sodium molybdate dihydrate, 1-10% of sodium bicarbonate, 1-5% of polyethylene glycol, 1-6% of laurylamine polyoxyethylene ether, 1-10% of methyldiethanolamine, and the balance of deionized water.
Preferably, the paint comprises the following components in percentage by weight: 2% of hexamethylenetetramine, 2% of sodium metasilicate, 2% of sodium molybdate dihydrate, 5% of sodium bicarbonate, 2% of polyethylene glycol, 3% of dodecylamine polyoxyethylene ether, 5% of methyldiethanolamine and the balance of deionized water.
Preferably, the paint comprises the following components in percentage by weight: 5% of hexamethylenetetramine, 1% of sodium metasilicate, 4% of sodium molybdate dihydrate, 2% of sodium bicarbonate, 4% of polyethylene glycol, 1% of dodecylamine polyoxyethylene ether, 2% of methyldiethanolamine and the balance of deionized water.
Preferably, the paint comprises the following components in percentage by weight: 3% of hexamethylenetetramine, 6% of sodium metasilicate, 4% of sodium molybdate dihydrate, 6% of sodium bicarbonate, 5% of polyethylene glycol, 5% of dodecylamine polyoxyethylene ether, 4% of methyldiethanolamine and the balance of deionized water.
The invention aims to solve another technical problem and provides a preparation method of an organic stabilizer for water quality of a low-medium pressure drum boiler, which comprises the following steps:
1) adding deionized water accounting for 60-80% of the total amount of the deionized water into a first reaction kettle, sequentially adding hexamethylene tetramine, sodium metasilicate, sodium molybdate dihydrate and sodium bicarbonate, uniformly stirring, keeping the temperature at 25-40 ℃ until the solution is a transparent solution, and standing;
2) adding deionized water accounting for 20-40% of the total amount of the deionized water into a second reaction kettle, sequentially adding polyethylene glycol, dodecylamine polyoxyethylene ether and methyldiethanolamine until the solution is transparent, and standing;
3) slowly and uniformly adding the solution prepared in the first reaction kettle into the second reaction kettle, simultaneously keeping the second reaction kettle to be stirred at a constant speed until the solution is stopped 30min after the addition is finished, standing for 0.5-1 h to obtain a uniform solution, and packaging a finished product after relevant indexes are detected to be qualified.
Description of the principle:
1) a continuous and compact protective film can be formed on the surfaces of the boiler body and the condensation water return pipeline, so that the corrosion of the surface of the boiler can be effectively prevented; the furnace water stabilizer chelates various scale forming corrosive ions, and the multiple components synergize to avoid the formation of scale and silica scale; through strong constraint on ion chelation and change of the surface form of furnace water, foam increase or steam-water costemesis are inhibited, steam entrainment is avoided, and the steam quality is purified; the water supply stabilizer can adjust and stabilize the pH value and dissolved oxygen of water supply, has no stimulation to environment and operators, and has no influence on human health;
2) the coating is environment-friendly and free of phosphorus, so that the phosphate hiding is fundamentally eliminated, the acid corrosion and the alkali brittleness corrosion caused by the phosphate are eliminated, and the problem of pipe wall leakage is reduced; the chemical can remove existing old scale in the operation of the boiler and is discharged out of the boiler body through pollution discharge, thereby obviously improving the heat transfer efficiency of the boiler, saving fuel and simultaneously avoiding the phenomenon of tube explosion caused by uneven heating of a furnace tube.
3) The boiler water purification agent is composed of a plurality of organic components, the salt content and the conductivity of the boiler water cannot be increased by the agent, and can be reduced to the minimum, so that the maximum water quality purification is realized, the lowest pollution discharge rate of a boiler is allowed to be 0.2%, and the regular arrangement is prolonged to 7-10 days from the original one time per shift; the continuous drainage is reduced to the minimum opening from the original opening, or is directly closed, and only the internal leakage of the valve is used for discharging pollution; the method can save the sewage discharge by more than 80 percent, improve the concentration multiple, save a large amount of heat energy and obviously increase the economic benefit.
The invention has the beneficial effects that:
the organic stabilizer for the water quality of the low-medium pressure drum boiler has the treatment performance completely superior to that of phosphate treatment, can form a complete corrosion and scaling protection system for a boiler water vapor system, can obviously reduce the pollution discharge of the boiler, and can greatly purify water vapor indexes; wherein, hexamethylenetetramine is used as a corrosion inhibition component and an adsorption component to cooperatively perform the corrosion protection function of water quality, sodium metasilicate and sodium molybdate dihydrate are used as non-phosphorus corrosion inhibitors, chelating and dispersing the scale and corrosive ions in water to keep the ions in a microcrystalline state in the water so as not to grow into a larger scale or corrosive substance, taking polyethylene glycol, lauryl amine polyoxyethylene ether, methyldiethanolamine and the like as regulating components of the interface form of the water, the interface form of water is adjusted, water quality control is carried out by matching with other components, the sodium bicarbonate and the methyldiethanolamine are used as the conditioning agent and the buffering agent, and the sodium bicarbonate and the methyldiethanolamine are used as the conditioning agent and the buffering agent, so that a wider application range is comprehensively realized on water quality and medicaments, the performance of the water-based composite material is more comprehensive and comprehensive, and the applicability is wider.
Detailed Description
The present invention is further described with reference to specific examples to enable those skilled in the art to better understand the present invention and to practice the same, but the examples are not intended to limit the present invention.
Example 1
An organic stabilizer for water quality of a low-medium pressure drum boiler comprises the following components in percentage by weight: 2% of hexamethylenetetramine, 2% of sodium metasilicate, 2% of sodium molybdate dihydrate, 5% of sodium bicarbonate, 2% of polyethylene glycol, 3% of dodecylamine polyoxyethylene ether, 5% of methyldiethanolamine and the balance of deionized water.
A preparation method of an organic stabilizer for water quality of a low-medium pressure drum boiler comprises the following steps:
1) adding deionized water accounting for 60% of the total amount of the deionized water into a first reaction kettle, sequentially adding 2% of hexamethylenetetramine, 2% of sodium metasilicate, 2% of sodium molybdate dihydrate and 5% of sodium bicarbonate, uniformly stirring, keeping the temperature at 25-40 ℃ until the solution is a transparent solution, and standing;
2) adding deionized water accounting for 40% of the total amount of the deionized water into a second reaction kettle, sequentially adding 2% of polyethylene glycol, 3% of dodecylamine polyoxyethylene ether and 5% of methyldiethanolamine until the solution is transparent, and standing;
3) slowly and uniformly adding the solution prepared in the first reaction kettle into the second reaction kettle, simultaneously keeping the second reaction kettle to be stirred at a constant speed until the solution is added for 30min, standing for 30min to obtain a uniform solution, and packaging a finished product after detecting relevant indexes to be qualified.
Example 2
An organic stabilizer for water quality of a low-medium pressure drum boiler comprises the following components in percentage by weight: 5% of hexamethylenetetramine, 1% of sodium metasilicate, 4% of sodium molybdate dihydrate, 2% of sodium bicarbonate, 4% of polyethylene glycol, 1% of dodecylamine polyoxyethylene ether, 2% of methyldiethanolamine and the balance of deionized water.
A preparation method of an organic stabilizer for water quality of a low-medium pressure drum boiler comprises the following steps:
1) adding deionized water accounting for 80% of the total amount of the deionized water into a first reaction kettle, sequentially adding 5% of hexamethylenetetramine, 1% of sodium metasilicate, 4% of sodium molybdate dihydrate and 2% of sodium bicarbonate, uniformly stirring, keeping the temperature at 25-40 ℃ until the solution is a transparent solution, and standing;
2) adding deionized water accounting for 20% of the total amount of the deionized water into a second reaction kettle, sequentially adding 4% of polyethylene glycol, 1% of lauryl amine polyoxyethylene ether and 2% of methyldiethanolamine until the solution is transparent, and standing;
3) slowly and uniformly adding the solution prepared in the first reaction kettle into the second reaction kettle, simultaneously keeping the second reaction kettle to be stirred at a constant speed until the solution is stopped 30min after the addition is finished, standing for 60min to obtain a uniform solution, and packaging a finished product after relevant indexes are detected to be qualified.
Example 3
An organic stabilizer for water quality of a low-medium pressure drum boiler comprises the following components in percentage by weight: 3% of hexamethylenetetramine, 6% of sodium metasilicate, 4% of sodium molybdate dihydrate, 6% of sodium bicarbonate, 5% of polyethylene glycol, 5% of dodecylamine polyoxyethylene ether, 4% of methyldiethanolamine and the balance of deionized water.
A preparation method of an organic stabilizer for water quality of a low-medium pressure drum boiler comprises the following steps:
1) adding deionized water accounting for 70% of the total amount of the deionized water into a first reaction kettle, sequentially adding 3% of hexamethylenetetramine, 6% of sodium metasilicate, 4% of sodium molybdate dihydrate and 6% of sodium bicarbonate, uniformly stirring, keeping the temperature at 25-40 ℃ until the solution is a transparent solution, and standing;
2) adding deionized water accounting for 30% of the total amount of the deionized water into a second reaction kettle, sequentially adding 5% of polyethylene glycol, 5% of lauryl amine polyoxyethylene ether and 4% of methyldiethanolamine until the solution is transparent, and standing;
3) slowly and uniformly adding the solution prepared in the first reaction kettle into the second reaction kettle, simultaneously keeping the second reaction kettle to be stirred at a constant speed until the solution is stirred for 30min after the addition is finished, standing for 45min to obtain a uniform solution, and packaging a finished product after relevant indexes are detected to be qualified.
Examples of the experiments
By the above examples, the organic stabilizer for water quality of the low-medium pressure drum boiler is prepared and used in boiler water, and indexes of the boiler water are recorded, and the results are shown in tables 1-4 below.
TABLE 1 conductivity of furnace Water
Note: the data in the table are average values of samples taken in a certain proportion every month.
As can be seen from Table 1, before the organic stabilizer for the water quality of the low-medium pressure drum boiler is used, the conductivity of the boiler water is higher, the fluctuation range is larger, and the control of the boiler water quality is not facilitated; after the organic stabilizer for the water quality of the low-medium pressure drum boiler is used, the conductivity of the boiler water is obviously reduced and basically stabilized in a range of 30-50 uS/cm.
TABLE 2 PH of furnace Water
Note: the data in the table are average values of samples taken in a certain proportion every month.
As can be seen from Table 2, before the organic stabilizer for the water quality of the low-medium pressure drum boiler is used, the fluctuation of the PH value of the boiler water is large, the difficulty of adding the chemical control index by workers is increased, and the stability of the water quality and the steam quality of the boiler water is not facilitated; after the organic stabilizer for the water quality of the low-medium pressure drum boiler is used, the PH value of the boiler water is gradually stabilized in a narrower numerical value range and is in an optimal control range, which shows that the boiler water quality is well controlled and maintained after the organic stabilizer for the water quality of the low-medium pressure drum boiler is added.
TABLE 3 silica content of saturated steam
Note: the data in the table are average values of samples taken in a certain proportion every month.
As can be seen from Table 3, before the novel energy-saving product intelligent management system is used, the content of silicon dioxide in saturated steam is within the range of 16-30 ug/l, and the silicon dioxide is easy to deposit and enrich in pipelines and steam systems along with the accumulation of time. After the intelligent management system is used, the content of silicon dioxide in saturated steam is reduced to 5-9 ug/l, the carrying capacity is greatly reduced, and the quality of the steam is greatly purified after the intelligent management system is used stably.
TABLE 4 blow-down flow
Note: the data in the table are average values of samples taken in a certain proportion every month.
As can be seen from Table 4, before the organic stabilizer for the water quality of the low-medium pressure drum boiler is used, the continuous discharge opening degree is larger, the fixed discharge is performed at least once every shift, the boiler discharge capacity is always 6-10t/h, and a large amount of high-temperature water and steam resources are wasted; after the organic stabilizer for the water quality of the low-medium pressure drum boiler is used, the continuous drainage opening is reduced to the minimum opening, the fixed drainage is reduced to 7-9 days once, the sewage discharge amount is reduced to 2-3t/h, a large amount of water vapor resources are saved, about 70-130 tons of sewage can be saved every day, the high-temperature sewage discharge cost is calculated according to 85 yuan/ton, about 100 yuan can be saved and about 200 ten thousand yuan can be saved every year, and the economic benefit increment is very obvious.
TABLE 5 parameter ranges for low to ultra high pressure boilers
The experimental example mainly aims at low and medium pressure boilers, namely drum boilers with the pressure range P less than 5.3 Mpa. .
The invention has the beneficial effects that:
the organic stabilizer for the water quality of the low-medium pressure drum boiler has the treatment performance completely superior to that of phosphate treatment, can form a complete corrosion and scaling protection system for a boiler water vapor system, can obviously reduce the pollution discharge of the boiler, and can greatly purify water vapor indexes; wherein, hexamethylenetetramine is used as a corrosion inhibition component and an adsorption component to cooperatively perform the corrosion protection function of water quality, sodium metasilicate and sodium molybdate dihydrate are used as non-phosphorus corrosion inhibitors, chelating and dispersing the scale and corrosive ions in water to keep the ions in a microcrystalline state in the water so as not to grow into a larger scale or corrosive substance, taking polyethylene glycol, lauryl amine polyoxyethylene ether, methyldiethanolamine and the like as regulating components of the interface form of the water, the interface form of water is adjusted, water quality control is carried out by matching with other components, the sodium bicarbonate and the methyldiethanolamine are used as the conditioning agent and the buffering agent, and the sodium bicarbonate and the methyldiethanolamine are used as the conditioning agent and the buffering agent, so that a wider application range is comprehensively realized on water quality and medicaments, the performance of the water-based composite material is more comprehensive and comprehensive, and the applicability is wider.
The above-described embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and various other modifications, substitutions and alterations can be made to the above-described structure of the present invention without departing from the basic technical concept of the present invention as described above, according to the common technical knowledge and conventional means in the field of the present invention.
Claims (5)
1. An organic stabilizer for water quality of a low-medium pressure drum boiler is characterized by comprising the following raw materials in percentage by weight: 1-10% of hexamethylenetetramine, 1-10% of sodium metasilicate, 1-5% of sodium molybdate dihydrate, 1-10% of sodium bicarbonate, 1-5% of polyethylene glycol, 1-6% of laurylamine polyoxyethylene ether, 1-10% of methyldiethanolamine, and the balance of deionized water.
2. The organic stabilizer for the water quality of the low-medium pressure drum boiler as claimed in claim 1, which comprises the following components in percentage by weight: 2% of hexamethylenetetramine, 2% of sodium metasilicate, 2% of sodium molybdate dihydrate, 5% of sodium bicarbonate, 2% of polyethylene glycol, 3% of dodecylamine polyoxyethylene ether, 5% of methyldiethanolamine and the balance of deionized water.
3. The organic stabilizer for the water quality of the low-medium pressure drum boiler as claimed in claim 1, which comprises the following components in percentage by weight: 5% of hexamethylenetetramine, 1% of sodium metasilicate, 4% of sodium molybdate dihydrate, 2% of sodium bicarbonate, 4% of polyethylene glycol, 1% of dodecylamine polyoxyethylene ether, 2% of methyldiethanolamine and the balance of deionized water.
4. The organic stabilizer for the water quality of the low-medium pressure drum boiler as claimed in claim 1, which comprises the following components in percentage by weight: 3% of hexamethylenetetramine, 6% of sodium metasilicate, 4% of sodium molybdate dihydrate, 6% of sodium bicarbonate, 5% of polyethylene glycol, 5% of dodecylamine polyoxyethylene ether, 4% of methyldiethanolamine and the balance of deionized water.
5. A preparation method of an organic stabilizer for water quality of a low-medium pressure drum boiler is characterized by comprising the following steps:
1) adding deionized water accounting for 60-80% of the total amount of the deionized water into a first reaction kettle, sequentially adding hexamethylene tetramine, sodium metasilicate, sodium molybdate dihydrate and sodium bicarbonate, uniformly stirring, keeping the temperature at 25-40 ℃ until the solution is a transparent solution, and standing;
2) adding deionized water accounting for 20-40% of the total amount of the deionized water into a second reaction kettle, sequentially adding polyethylene glycol, dodecylamine polyoxyethylene ether and methyldiethanolamine until the solution is transparent, and standing;
3) slowly and uniformly adding the solution prepared in the first reaction kettle into the second reaction kettle, simultaneously keeping the second reaction kettle to be stirred at a constant speed until the solution is stopped 30min after the addition is finished, standing for 0.5-1 h to obtain a uniform solution, and packaging a finished product after relevant indexes are detected to be qualified.
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