CN113481064B - Boiler water wall cleaning agent, preparation method and use method - Google Patents
Boiler water wall cleaning agent, preparation method and use method Download PDFInfo
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- CN113481064B CN113481064B CN202110754466.0A CN202110754466A CN113481064B CN 113481064 B CN113481064 B CN 113481064B CN 202110754466 A CN202110754466 A CN 202110754466A CN 113481064 B CN113481064 B CN 113481064B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 239000012459 cleaning agent Substances 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000000203 mixture Substances 0.000 claims abstract description 31
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 25
- -1 alkenyl imidazoline quaternary ammonium compound Chemical class 0.000 claims abstract description 25
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 25
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 21
- WOWHHFRSBJGXCM-UHFFFAOYSA-M cetyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)C WOWHHFRSBJGXCM-UHFFFAOYSA-M 0.000 claims abstract description 21
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- VBIIFPGSPJYLRR-UHFFFAOYSA-M Stearyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)C VBIIFPGSPJYLRR-UHFFFAOYSA-M 0.000 claims abstract description 19
- 239000001488 sodium phosphate Substances 0.000 claims abstract description 17
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims abstract description 17
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims abstract description 17
- 235000019801 trisodium phosphate Nutrition 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000005303 weighing Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims 1
- 238000004140 cleaning Methods 0.000 abstract description 27
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 12
- 239000003245 coal Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 229910000323 aluminium silicate Inorganic materials 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005235 decoking Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910002808 Si–O–Si Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/38—Cationic compounds
- C11D1/645—Mixtures of compounds all of which are cationic
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/042—Acids
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/06—Phosphates, including polyphosphates
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/08—Silicates
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/38—Cationic compounds
- C11D1/58—Heterocyclic compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/38—Cationic compounds
- C11D1/62—Quaternary ammonium compounds
-
- C11D2111/20—
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Detergent Compositions (AREA)
Abstract
A boiler water wall cleaning agent and a preparation method and a use method thereof relate to a cleaning agent and a preparation method and a use method thereof. The invention aims to solve the problems that the cleaning of the boiler water-cooling wall by using the existing cleaning agent for the boiler water-cooling wall is time-consuming and labor-consuming, the cleaning cost is high, the boiler is easy to damage, the scale removal rate is low, frequent cleaning is needed, and the scale is easy to scale after cleaning. A cleaning agent for water-cooled wall of boiler is prepared from hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, sodium silicate, hydrochloric acid, nitric acid, vinylamide ethyl type alkenyl imidazoline quaternary ammonium compound and water. The method comprises the following steps: firstly, weighing materials; secondly, mixing; thirdly, the mixture is put into a reaction kettle, and the temperature and the pressure are controlled for reaction; fourthly, adjusting the pH value. The using method comprises the following steps: spraying the boiler water wall cleaning agent on the boiler water wall scales, and then spraying the trisodium phosphate solution. The cleaning rate of the boiler water wall cleaning agent prepared by the invention on boiler water wall scale can reach 100%.
Description
Technical Field
The invention relates to a cleaning agent, a preparation method and a use method thereof.
Background
The problems of scale, corrosion and the like are inevitably caused no matter a large-scale thermal power plant boiler is in a capital construction period or a unit runs for a period of time. The heat transfer performance is deteriorated due to the generation of scale, so that the boiler efficiency is reduced, the heat transfer efficiency of the heating surface is reduced due to the smoke scale, the heating surface is heated unevenly, so that the metal surface is locally overheated, and the furnace tube bulges or even explodes under the pressure action of the boiler. Therefore, after the scale amount of the furnace tube reaches the corresponding standard requirement, the furnace tube must be cleaned to obtain a clean heated surface, thereby achieving the purposes of saving energy, reducing consumption and preventing the corrosion and tube explosion of the furnace tube.
The existing cleaning method comprises manual cleaning and chemical cleaning, manual decoking is adopted on the heating surface of the boiler, decoking is incomplete, heat transfer of the boiler is affected, water circulation of the boiler is affected, and the condition that the heating surface is heated unevenly when the boiler is started up after the boiler is stopped is caused, so that a pipe explosion accident is caused.
The cleaning method commonly adopted by chemical cleaning comprises the steps of using hydrochloric acid, citric acid, EDTA ammonium salt, hydrofluoric acid, sulfamic acid, sulfuric acid and the like, and can be completed only by two steps of cleaning, descaling and passivating, such as acid cleaning, water washing, rinsing and the like, the cleaning time is long, the cleaning process is complex, a large amount of consumed desalted water is consumed, the treatment capacity of waste liquid is large, and the environmental protection requirement is difficult to meet comprehensively.
In addition, the existing boiler cleaning agent is used for descaling, and the problems that the cleaning rate is low, the boiler needs to be cleaned frequently, the cleaning period is short, and the boiler is easy to scale after being cleaned exist.
Disclosure of Invention
The invention aims to solve the problems that the cleaning of the boiler water-cooling wall by using the existing cleaning agent for the boiler water-cooling wall is time-consuming and labor-consuming, the cleaning cost is high, the boiler is easy to damage, the scale removal rate is low, frequent cleaning is needed, and the scale is easy to scale after cleaning.
The boiler water wall cleaning agent is prepared from 12-30 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10-20 parts by weight of sodium silicate, 5-25 parts by weight of hydrochloric acid, 1-15 parts by weight of nitric acid, 10-20 parts by weight of enamide ethyl type alkenyl imidazoline quaternary ammonium compound and 300-450 parts by weight of water.
A preparation method of a boiler water wall cleaning agent is completed according to the following steps:
firstly, weighing materials:
weighing 12 to 30 parts of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10 to 20 parts of sodium silicate, 5 to 25 parts of hydrochloric acid, 1 to 15 parts of nitric acid, 10 to 20 parts of enamide ethyl alkenyl imidazoline quaternary ammonium compound and 300 to 450 parts of water in parts by weight;
secondly, uniformly mixing 12-30 parts of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10-20 parts of sodium silicate, 5-25 parts of hydrochloric acid, 1-15 parts of nitric acid, 10-20 parts of vinyl amido ethyl alkenyl imidazoline quaternary ammonium compound and 300-450 parts of water, which are weighed in the step one, to obtain a mixture;
adding the mixture into a reaction kettle, controlling the temperature of the reaction kettle to be 110-140 ℃, controlling the pressure in the reaction kettle to be 2-3 MPa, and reacting the mixture for 2-8 h under the conditions of the temperature of 110-140 ℃ and the pressure of 2-3 MPa to obtain a viscous mixture;
and fourthly, adjusting the pH value of the viscous mixture to 6.5-7.5 by using sodium carbonate, and cooling to room temperature to obtain the boiler water-cooled wall cleaning agent.
The use method of the boiler water wall cleaning agent is completed according to the following steps:
spraying a boiler water wall cleaning agent on boiler water wall scales, and then spraying a trisodium phosphate solution to obtain a cleaned boiler water wall;
the mass ratio of the boiler water wall cleaning agent to the scale is 1 (1-15);
the mass ratio of the volume of the trisodium phosphate solution to the scale is (2 mL-50 mL):1g, wherein the mass fraction of the trisodium phosphate solution is 2% -15%.
The principle of the invention is as follows:
according to Agilent 630 infrared spectrum analysis, the main component of the water wall soot is aluminosilicate with a structural formula of Si-O-Si; the invention relates to ferric oxide and the like, wherein hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride mainly plays a role of a surfactant in a boiler water wall cleaning agent, can adsorb cations in a neutral or alkaline solution to modify silicon ions in sodium silicate, and then is used as an initiator factor to induce local decomposition of aluminosilicate, wherein part of aluminosilicate ions are slightly soluble in hydrochloric acid and nitric acid by using an inter-ion gap, and part of aluminosilicate ions are slightly soluble in the hydrochloric acid and the nitric acid, and an enamidoethyl alkenyl imidazoline quaternary ammonium compound is used as an emulsifier, and the surface tension of the emulsifier and trisodium phosphate sprayed later quickly permeate to a metal surface to form a film with the thickness of 300-800 nanometers, so that soot is separated from the metal surface by 100%.
The invention has the advantages that:
firstly, the cleaning rate of the boiler water wall cleaning agent prepared by the invention on boiler water wall scale can reach 100%;
secondly, the boiler water wall cleaning agent prepared by the invention is used for removing boiler water wall scales, and the cleaned boiler water wall can reach the heat efficiency of a new boiler;
thirdly, the boiler water wall cleaning agent prepared by the invention is used for cleaning the boiler water wall, so that scale is not easy to scale after cleaning, and the cleaning period can be as long as 4 years;
fourthly, the boiler water wall cleaning agent prepared by the invention is used for cleaning the boiler water wall, and the reduction rate of the power supply coal consumption of the cleaned boiler unit is 1.8-2.1%.
The invention can obtain the boiler water wall cleaning agent.
Drawings
FIG. 1 is a first digital photograph of a boiler water-cooled wall of example two before it is cleaned;
FIG. 2 is a digital photograph of the boiler water wall in FIG. 1 after being cleaned by using the boiler water wall cleaning agent prepared in the first embodiment;
FIG. 3 is a second digital photograph of the boiler water wall in the second embodiment before it is cleaned;
FIG. 4 is a digital photograph of the boiler water wall in FIG. 3 after being cleaned by using the boiler water wall cleaning agent prepared in the first embodiment;
FIG. 5 is a digital photograph of a boiler water wall in a third example, which was cleaned with the boiler water wall cleaning agent prepared in the first example, after the water wall was cleaned for one year;
FIG. 6 is a digital photograph of a boiler water wall in a third example, which was cleaned with the boiler water wall cleaning agent prepared in the first example, and the water wall was cleaned for three years.
Detailed Description
The following examples further illustrate the present invention but are not to be construed as limiting the invention. Modifications and substitutions to methods, procedures, or conditions of the invention may be made without departing from the spirit of the invention.
The first embodiment is as follows: the boiler water wall cleaning agent is prepared from 12 to 30 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10 to 20 parts by weight of sodium silicate, 5 to 25 parts by weight of hydrochloric acid, 1 to 15 parts by weight of nitric acid, 10 to 20 parts by weight of enamide ethyl type alkenyl imidazoline quaternary ammonium compound and 300 to 450 parts by weight of water.
The second embodiment is as follows: the present embodiment differs from the present embodiment in that: the boiler water wall cleaning agent is prepared from 12 to 20 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10 to 15 parts by weight of sodium silicate, 5 to 10 parts by weight of hydrochloric acid, 1 to 10 parts by weight of nitric acid, 10 to 15 parts by weight of enamide ethyl type alkenyl imidazoline quaternary ammonium compound and 300 to 350 parts by weight of water. Other steps are the same as in the first embodiment.
The third concrete implementation mode: the difference between this embodiment and the first or second embodiment is: the boiler water wall cleaning agent is prepared from 20-30 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 15-20 parts by weight of sodium silicate, 10-25 parts by weight of hydrochloric acid, 10-15 parts by weight of nitric acid, 15-20 parts by weight of enamide ethyl type alkenyl imidazoline quaternary ammonium compound and 350-450 parts by weight of water. The other steps are the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment and one of the first to third embodiments is as follows: the boiler water wall cleaning agent is prepared from 20 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10 parts by weight of sodium silicate, 10 parts by weight of hydrochloric acid, 7 parts by weight of nitric acid, 16 parts by weight of enamide ethyl type alkenyl imidazoline quaternary ammonium compound and 380 parts by weight of water. The other steps are the same as those in the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is: the mass fraction of the hydrochloric acid is 37 percent; the mass fraction of the nitric acid is 65%. The other steps are the same as those in the first to fourth embodiments.
The sixth specific implementation mode: the embodiment is a preparation method of a boiler water wall cleaning agent, which is completed according to the following steps:
firstly, weighing materials:
weighing 12-30 parts of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10-20 parts of sodium silicate, 5-25 parts of hydrochloric acid, 1-15 parts of nitric acid, 10-20 parts of enamidoethyl type alkenyl imidazoline quaternary ammonium compound and 300-450 parts of water according to parts by weight;
secondly, uniformly mixing 12 to 30 parts of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10 to 20 parts of sodium silicate, 5 to 25 parts of hydrochloric acid, 1 to 15 parts of nitric acid, 10 to 20 parts of enamidoethyl type alkenyl imidazoline quaternary ammonium compound and 300 to 450 parts of water which are weighed in the step one to obtain a mixture;
adding the mixture into a reaction kettle, controlling the temperature of the reaction kettle to be 110-140 ℃, controlling the pressure in the reaction kettle to be 2-3 MPa, and reacting the mixture for 2-8 h under the conditions of the temperature of 110-140 ℃ and the pressure of 2-3 MPa to obtain a viscous mixture;
and fourthly, adjusting the pH value of the viscous mixture to 6.5-7.5 by using sodium carbonate, and cooling to room temperature to obtain the boiler water wall cleaning agent.
The seventh embodiment: the present embodiment differs from the sixth embodiment in that: in the first step, 20 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10 parts by weight of sodium silicate, 10 parts by weight of hydrochloric acid, 7 parts by weight of nitric acid, 16 parts by weight of enamidoethyl alkenyl imidazoline quaternary ammonium compound and 380 parts by weight of water are weighed. The other steps are the same as in the sixth embodiment.
The specific implementation mode is eight: the difference between this embodiment and one of the sixth to seventh embodiments is: and step three, adding the mixture into a reaction kettle, controlling the temperature of the reaction kettle to be 125 ℃, controlling the pressure in the reaction kettle to be 2.5MPa, and reacting the mixture for 5 hours under the conditions that the temperature is 125 ℃ and the pressure is 2.5MPa to obtain a viscous mixture. The other steps are the same as those of the sixth to seventh embodiments.
The specific implementation method nine: the present embodiment differs from the sixth to eighth embodiments in that: and in the fourth step, sodium carbonate is used for adjusting the pH value of the viscous mixture to 7, and the mixture is cooled to room temperature to obtain the boiler water wall cleaning agent. The other steps are the same as those in the sixth to eighth embodiments.
The detailed implementation mode is ten: the difference between this embodiment and one of the sixth to ninth embodiments is: the using method of the boiler water wall cleaning agent is completed according to the following steps:
spraying a boiler water wall cleaning agent on boiler water wall scales, and then spraying a trisodium phosphate solution to obtain a cleaned boiler water wall;
the mass ratio of the boiler water wall cleaning agent to the scale is 1 (1-15);
the mass ratio of the volume of the trisodium phosphate solution to the scale is (2 mL-50 mL):1g, wherein the mass fraction of the trisodium phosphate solution is 2% -15%. The other steps are the same as in embodiments six to nine.
The present invention will be described in detail below with reference to the accompanying drawings and examples.
The first embodiment is as follows: a preparation method of a boiler water wall cleaning agent is completed according to the following steps:
firstly, weighing materials:
weighing 20 parts of hexadecyl trimethyl ammonium chloride, 10 parts of sodium silicate, 10 parts of hydrochloric acid, 7 parts of nitric acid, 16 parts of enamidoethyl type alkenyl imidazoline quaternary ammonium compound and 380 parts of water in parts by weight;
the mass fraction of the hydrochloric acid in the step one is 37%; the mass fraction of the nitric acid is 65 percent;
secondly, uniformly mixing 20 parts of hexadecyl trimethyl ammonium chloride, 10 parts of sodium silicate, 10 parts of hydrochloric acid, 7 parts of nitric acid, 16 parts of enamide ethyl type alkenyl imidazoline quaternary ammonium compound and 380 parts of water which are weighed in the step one to obtain a mixture;
thirdly, adding the mixture into a reaction kettle, controlling the temperature of the reaction kettle to be 125 ℃, the pressure in the reaction kettle to be 2.5MPa, and reacting the mixture for 5 hours under the conditions of the temperature of 125 ℃ and the pressure of 2.5MPa to obtain a viscous mixture;
and fourthly, adjusting the pH value of the viscous mixture to 7 by using sodium carbonate, and cooling to room temperature to obtain the boiler water wall cleaning agent.
Example two: the boiler water wall cleaning agent prepared in the first embodiment is used for cleaning the surface of the heating surface of a boiler of No. 1 of a 300MW unit of a power plant of Hua-Dy energy resources Limited company, and the specific method is as follows:
spraying the boiler water wall cleaning agent prepared in the first embodiment on boiler water wall scales, and then spraying a trisodium phosphate solution to obtain a cleaned boiler water wall;
the mass ratio of the boiler water-cooling wall cleaning agent to the scale is 1: 7;
the mass ratio of the volume of the trisodium phosphate solution to the scale is 22mL:1g, wherein the mass fraction of the trisodium phosphate solution is 7%.
FIG. 1 is a first digital photograph of a boiler water-cooled wall of example two before it is cleaned;
FIG. 2 is a digital photograph of the boiler water wall in FIG. 1 after being cleaned by using the boiler water wall cleaning agent prepared in the first embodiment;
FIG. 3 is a second digital photograph of the boiler water wall in the second embodiment before it is cleaned;
FIG. 4 is a digital photograph of the boiler water wall in FIG. 3 after being cleaned by using the boiler water wall cleaning agent prepared in the first embodiment;
as can be seen from fig. 1 to 4, in the second embodiment, the boiler water wall cleaning agent prepared in the first embodiment has a very good effect of removing boiler water wall scale, and the removal rate of the boiler water wall scale is 100%.
The power supply coal consumption and the reduction rate of the power supply coal consumption of the unit before and after the water-cooled wall scale of the unit boiler is cleaned are shown in table 1;
TABLE 1
As can be seen from Table 1, the boiler water wall cleaning agent prepared in the first embodiment can be used for removing boiler water wall scale, so that the power supply coal consumption can be reduced, and the reduction rate of the power supply coal consumption can reach 2.0732%.
Example three: the boiler water wall cleaning agent prepared in the first embodiment is used for cleaning the surface of the heating surface of the boiler of No. 8 power plant of Hua-Dynasty energy Limited company, and the specific method is as follows:
spraying the boiler water wall cleaning agent prepared in the first embodiment on boiler water wall scales, and then spraying a trisodium phosphate solution to obtain a cleaned boiler water wall;
the mass ratio of the boiler water-cooling wall cleaning agent to the scale is 1: 7;
the mass ratio of the volume of the trisodium phosphate solution to the scale is 22mL:1g, wherein the mass fraction of the trisodium phosphate solution is 7%.
In the embodiment, the boiler water wall cleaning agent prepared in the first embodiment has a very good effect of removing boiler water wall scale, and the removal rate of the boiler water wall scale is 100%.
FIG. 5 is a digital photograph of a boiler water wall in a third example, which was cleaned with the boiler water wall cleaning agent prepared in the first example, after the water wall was cleaned for one year;
FIG. 6 is a digital photograph of a boiler water wall in a third example, which was cleaned with the boiler water wall cleaning agent prepared in the first example, and the water wall was cleaned for three years.
As can be seen from FIGS. 5 and 6, the boiler water wall is cleaned by using the boiler water wall cleaning agent prepared in the first embodiment, and the cleaning agent is not easy to scale.
The power supply coal consumption and the reduction rate of the power supply coal consumption of the unit before and after the water-cooled wall scale of the unit boiler is cleaned are shown in table 2;
TABLE 2
As can be seen from Table 2, the boiler water wall cleaning agent prepared in the first embodiment can be used for removing boiler water wall scale, so that the power supply coal consumption can be reduced, and the reduction rate of the power supply coal consumption can reach 1.8849%.
Claims (8)
1. The boiler water-cooling wall cleaning agent is characterized by being prepared from 12-30 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10-20 parts by weight of sodium silicate, 5-25 parts by weight of hydrochloric acid, 1-15 parts by weight of nitric acid, 10-20 parts by weight of enamino ethyl type alkenyl imidazoline quaternary ammonium compound and 300-450 parts by weight of water;
the mass fraction of the hydrochloric acid is 37 percent; the mass fraction of the nitric acid is 65 percent;
the using method of the boiler water wall cleaning agent is completed according to the following steps:
spraying a boiler water wall cleaning agent on boiler water wall scales, and then spraying a trisodium phosphate solution to obtain a cleaned boiler water wall;
the mass ratio of the boiler water wall cleaning agent to the scale is 1 (1-15);
the mass ratio of the volume of the trisodium phosphate solution to the scale is (2 mL-50 mL):1g, wherein the mass fraction of the trisodium phosphate solution is 2% -15%.
2. The boiler water wall cleaning agent as claimed in claim 1, which is prepared from 12-20 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10-15 parts by weight of sodium silicate, 5-10 parts by weight of hydrochloric acid, 1-10 parts by weight of nitric acid, 10-15 parts by weight of enamidoethyl alkenyl imidazoline quaternary ammonium compound and 300-350 parts by weight of water.
3. The boiler water wall cleaning agent as claimed in claim 1, which is prepared from 20-30 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 15-20 parts by weight of sodium silicate, 10-25 parts by weight of hydrochloric acid, 10-15 parts by weight of nitric acid, 15-20 parts by weight of enamidoethyl alkenyl imidazoline quaternary ammonium compound and 350-450 parts by weight of water.
4. The boiler water wall cleaning agent according to claim 1, characterized in that the cleaning agent is prepared from 20 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10 parts by weight of sodium silicate, 10 parts by weight of hydrochloric acid, 7 parts by weight of nitric acid, 16 parts by weight of enamidoethyl alkenyl imidazoline quaternary ammonium compound and 380 parts by weight of water.
5. The preparation method of the boiler water wall cleaning agent as claimed in claim 1, characterized in that the method is completed by the following steps:
firstly, weighing materials:
weighing 12-30 parts by weight of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10-20 parts by weight of sodium silicate, 5-25 parts by weight of hydrochloric acid, 1-15 parts by weight of nitric acid, 10-20 parts by weight of enamidoethyl alkenyl imidazoline quaternary ammonium compound and 300-450 parts by weight of water;
secondly, uniformly mixing 12-30 parts of hexadecyl trimethyl ammonium chloride or octadecyl trimethyl ammonium chloride, 10-20 parts of sodium silicate, 5-25 parts of hydrochloric acid, 1-15 parts of nitric acid, 10-20 parts of enamidoethyl alkenyl imidazoline quaternary ammonium compound and 300-450 parts of water, wherein the parts are weighed in the step one, so as to obtain a mixture;
adding the mixture into a reaction kettle, controlling the temperature of the reaction kettle to be 110-140 ℃, controlling the pressure in the reaction kettle to be 2-3 MPa, and reacting the mixture for 2-8 h under the conditions that the temperature is 110-140 ℃ and the pressure is 2-3 MPa to obtain a viscous mixture;
and fourthly, adjusting the pH value of the viscous mixture to 6.5-7.5 by using sodium carbonate, and cooling to room temperature to obtain the boiler water-cooled wall cleaning agent.
6. The method for preparing the boiler water wall cleaning agent according to claim 5, wherein in the first step, 20 parts by weight of cetyl trimethyl ammonium chloride or stearyl trimethyl ammonium chloride, 10 parts by weight of sodium silicate, 10 parts by weight of hydrochloric acid, 7 parts by weight of nitric acid, 16 parts by weight of enamide ethyl type alkenyl imidazoline quaternary ammonium compound and 380 parts by weight of water are weighed.
7. The preparation method of the boiler water wall cleaning agent according to claim 5 or 6, characterized in that the mixture is added into a reaction kettle in the third step, the temperature of the reaction kettle is controlled at 125 ℃, the pressure in the reaction kettle is 2.5MPa, and the mixture reacts for 5 hours under the conditions of the temperature of 125 ℃ and the pressure of 2.5MPa to obtain a viscous mixture.
8. The method for preparing the boiler water wall cleaning agent according to claim 7, wherein the pH value of the viscous mixture is adjusted to 7 by using sodium carbonate in the fourth step, and the mixture is cooled to room temperature to obtain the boiler water wall cleaning agent.
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| CN1353179A (en) * | 2000-11-07 | 2002-06-12 | 过伟权 | Cleanser for fuem deposit of boiler |
| CN100485023C (en) * | 2007-09-12 | 2009-05-06 | 过伟权 | Boiler chimney soot cleaning agent |
| CN101555441B (en) * | 2008-04-09 | 2012-03-21 | 中国神华能源股份有限公司 | Cleaning agent and cleaning process of GGH heat exchange component |
| CN106497699B (en) * | 2016-09-30 | 2019-02-15 | 陈甦 | A kind of Compositional type boiler chimney soot cleaning agent and preparation method thereof |
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