CN116218263A - Anti-wear coating for water-cooled wall of circulating fluidized bed boiler - Google Patents
Anti-wear coating for water-cooled wall of circulating fluidized bed boiler Download PDFInfo
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- CN116218263A CN116218263A CN202310255180.7A CN202310255180A CN116218263A CN 116218263 A CN116218263 A CN 116218263A CN 202310255180 A CN202310255180 A CN 202310255180A CN 116218263 A CN116218263 A CN 116218263A
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- Prior art keywords
- water
- castable
- aluminum magnesium
- fluidized bed
- powder
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- 238000000576 coating method Methods 0.000 title claims abstract description 29
- 239000011248 coating agent Substances 0.000 title claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 12
- 239000011777 magnesium Substances 0.000 claims abstract description 7
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 238000005299 abrasion Methods 0.000 claims description 7
- 239000003973 paint Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000035939 shock Effects 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 235000019353 potassium silicate Nutrition 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an anti-wear coating for a water wall of a circulating fluidized bed boiler, which relates to the technical field of anti-wear coatings, and is developed to have the anti-wear effect when applied to a boiler water wall pipe, and prolong the service life of the water wall pipe, and comprises R2O nSiO2, aluminum magnesium powder, castable and additive, wherein R2O nSiO2 is taken as a solvent, and the aluminum magnesium powder, the castable and the additive form a dry powder material, and the proportion is R2O nSiO2:40% of aluminum magnesium powder (AL+Mg): 40%, castable (AL 2O 3): 15%, additive: 5%, the invention is simple to use, the construction can be carried out after the dry powder of the mixture and the solvent are directly mixed and stirred, the relative indexes such as the solidifying performance and the bonding strength of the material are better, the use temperature can reach 950 ℃, the solidifying time is less than one hour, the water-cooled wall is protected for more than fifty days, the invention has good toughness and shock resistance, no corrosiveness, has strong adhesive force and bonding strength, the bonding strength is more than 50MPa, and the heat absorption of the water-cooled wall is not influenced by the thin coating thickness.
Description
Technical Field
The invention relates to the technical field of anti-wear paint, in particular to an anti-wear paint for a water wall of a circulating fluidized bed boiler.
Background
The invention mainly relates to an anti-wear coating technology, and the water cooling wall in a boiler is seriously worn by high-temperature materials due to the special combustion mode of a circulating fluidized bed boiler. The wear-resistant coating with high temperature resistance, wear resistance and corrosion resistance is developed, and is mainly applied to a boiler water wall tube to play a role in wear resistance, so that the service life of the water wall tube is prolonged.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the wear-resistant coating for the water wall of the circulating fluidized bed boiler, and solves the technical problem that the water wall of the circulating fluidized bed boiler in the prior art is seriously worn by high-temperature materials.
In order to achieve the above purpose, the invention is realized by the following technical scheme: 1. the wear-resistant coating for the water-cooled wall of the circulating fluidized bed boiler comprises R2O.nSiO2, aluminum magnesium powder, castable and additives, and is characterized in that the R2O.nSiO2 is taken as a dissolving agent, the aluminum magnesium powder, the castable and the additives form a dry powder material, and the proportion is R2O.nSiO2: 40% of aluminum magnesium powder (AL+Mg): 40%, castable (AL 2O 3): 15%, additive: 5%.
Preferably, the aluminum magnesium powder AL+Mg particles are rammed, filtered and ground to form powder with the diameter of about 0.01 mm.
Preferably, the casting material AL2O3 particles are subjected to ramming, filtering and grinding to form powder with the diameter of about 0.05 mm.
Preferably, the two powders are mixed in a stirrer at normal temperature, wherein the aluminum magnesium powder accounts for 70% and the castable powder accounts for 30%.
Preferably, the finished product is uniformly smeared on the water cooling wall of the boiler, and the thickness is about 3mm.
Advantageous effects
The invention provides an anti-abrasion coating for a water-cooled wall of a circulating fluidized bed boiler, which is simple to use, can be constructed after the dry powder of a mixture and a solvent are directly mixed and stirred, has good related indexes such as material solidification performance, bonding strength and the like, has the use temperature of 950 ℃ and the solidification time of less than one hour, has good toughness and shock resistance when the water-cooled wall is protected for more than fifty days, has no corrosiveness, has strong adhesive force and bonding strength, has the bonding strength of more than 50MPa, and has a thin coating thickness without influencing the heat absorption of the water-cooled wall.
Drawings
FIG. 1 is a photograph of a boiler start-up test coating of the present invention, 2018, 7, 1
FIG. 2 is a photograph of a coating for a 14-day boiler shutdown test of the present invention, 2018, 9
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a technical scheme that: 1. the wear-resistant coating for the water-cooled wall of the circulating fluidized bed boiler comprises R2O.nSiO2, aluminum magnesium powder, castable and additives, and is characterized in that the R2O.nSiO2 is taken as a dissolving agent, the aluminum magnesium powder, the castable and the additives form a dry powder material, and the proportion is R2O.nSiO2: 40% of aluminum magnesium powder (AL+Mg): 40%, castable (AL 2O 3): 15%, additive: 5%, the aluminum magnesium powder AL+Mg particles are rammed, filtered and ground to form powder with the diameter of about 0.01mm, the castable AL2O3 particles are rammed, filtered and ground to form powder with the diameter of about 0.05mm, and the two powders are mixed in a stirrer at normal temperature, wherein the aluminum magnesium powder accounts for 70%, the castable powder accounts for 30%, and the finished product is uniformly smeared on a boiler water wall and has the thickness of about 3mm.
The aluminum magnesium powder and castable material form a mixture, and R2O nSiO2 is added during use to be stirred for construction. The material has better curing performance, bonding strength and other related indexes.
1. The use temperature is as follows: 950 DEG C
2. Wear resistance: protecting water wall tube for more than 50 days
3. Curing time < 1 hour at room temperature
4. Has good toughness and shock resistance, and no corrosiveness
5. Coefficient of thermal expansion: as the coefficient of linear expansion of 20G, reference is made to an average coefficient of linear expansion of 11.16 10-6/. Degree.C.at 100 ℃.
6. Has strong adhesive force and bonding strength, and the bonding strength is more than or equal to 50MPa
9. The construction method comprises the following steps: directly coating the surface of the water-cooled wall with a brush.
10. The thickness of the coating is less than 0.5mm, the heat absorption of the water-cooled wall is not affected, and the heat transfer coefficient is > (25-500 ℃): 9.7W/M DEG C
Unsuitable conditions of use: experiments prove that the material is not suitable for the wear prevention treatment of the peripheral heating surface pipe of the steam soot blower.
The detailed connection means are known in the art, and the following mainly describes the working principle and process, and the specific work is as follows.
Examples: the abrasion resistance of the abrasion-resistant coating is tested by the following experiment, and the experiment is carried out at the water-cooled wall of the right wall of the elevation 44 m of the 330MW subcritical circulating fluidized bed boiler of Shanxi Beijing jade power generation limited responsibility company, wherein the temperature in the furnace is as follows: 880-950 ℃, serial number 1 anti-wear paint is applied on 29 days of 5 months in 2018, each paint is brushed once every 5 minutes at intervals, the total brushing time is 3 times, the thickness is about 0.3mm, the anti-wear paint covers 300mm of the length of a test water wall pipe, a boiler is started on 1 month of 2018, the boiler is stopped on 14 days of 9 months, the test time is 76 days, and the existence of the anti-wear paint on the water wall pipe is inspected macroscopically during the period, so that if the water wall base material is not exposed, the phenomenon of abrasion of the water wall pipe is not caused.
From the following experimental data
Waterwall tube number 68, labeled number 1 coating: aluminum magnesium powder and water glass
Water wall tube number 67, labeled number 2 coating: armaGuard ceramic coating
Water wall tube number 66, labeled number 3 coating: castable and water glass
Water wall tube number 65, labeled number 4 coating: chrome corundum plastic+phosphoric acid
Waterwall tube number 63, labeled number 6 coating: chrome corundum plastic and water glass
It is concluded that the coating has the advantages of high temperature resistance, abrasion resistance and corrosion resistance compared with the traditional coating, can be maintained for a longer time in a working environment with high abrasion and high corrosion resistance, and protects the existence of the water-cooled wall base material.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Claims (5)
1. The wear-resistant coating for the water-cooled wall of the circulating fluidized bed boiler comprises R2O.nSiO2, aluminum magnesium powder, castable and additives, and is characterized in that the R2O.nSiO2 is taken as a dissolving agent, the aluminum magnesium powder, the castable and the additives form a dry powder material, and the proportion is R2O.nSiO2: 40% of aluminum magnesium powder (AL+Mg): 40%, castable (AL 2O 3): 15%, additive: 5%.
2. The anti-abrasion paint for the water-cooled wall of the circulating fluidized bed boiler according to claim 1, wherein the aluminum magnesium powder AL+Mg particles are subjected to ramming, filtering and grinding in the production process to form powder with the diameter of about 0.01 mm.
3. The anti-wear coating for the water-cooled wall of the circulating fluidized bed boiler according to claim 1, wherein the casting material AL2O3 particles are subjected to ramming, filtering and grinding processing in the production process to form powder with the diameter of about 0.05 mm.
4. The anti-wear coating for the water-cooled wall of the circulating fluidized bed boiler according to claim 1, wherein two kinds of powder are mixed in a stirrer at normal temperature, wherein aluminum magnesium powder accounts for 70% and castable powder accounts for 30%.
5. The wear resistant coating for water walls of a circulating fluidized bed boiler of claim 1, wherein the finished product is uniformly applied to the water walls of the boiler to a thickness of about 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310255180.7A CN116218263A (en) | 2023-03-16 | 2023-03-16 | Anti-wear coating for water-cooled wall of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310255180.7A CN116218263A (en) | 2023-03-16 | 2023-03-16 | Anti-wear coating for water-cooled wall of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116218263A true CN116218263A (en) | 2023-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310255180.7A Pending CN116218263A (en) | 2023-03-16 | 2023-03-16 | Anti-wear coating for water-cooled wall of circulating fluidized bed boiler |
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| Country | Link |
|---|---|
| CN (1) | CN116218263A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281876A (en) * | 1999-07-21 | 2001-01-31 | 赵全玺 | Modified inorganic phosphate coating material |
| CN1786085A (en) * | 2004-12-08 | 2006-06-14 | 刘少光 | Super critical boiler wear resistant anticorrosion paint and its production method |
| CN105238151A (en) * | 2015-09-22 | 2016-01-13 | 安徽皖东化工有限公司 | Environment-friendly marine coating and manufacturing method thereof |
| CN109504137A (en) * | 2018-11-22 | 2019-03-22 | 深圳陶金材料科技有限公司 | A kind of high temperature resistant antiwear coating material and preparation method thereof for boiler water wall |
| CN113174560A (en) * | 2021-03-25 | 2021-07-27 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Multi-element alloy co-permeation agent for steel member passivation composite permeation layer corrosion prevention technology and preparation method thereof |
-
2023
- 2023-03-16 CN CN202310255180.7A patent/CN116218263A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281876A (en) * | 1999-07-21 | 2001-01-31 | 赵全玺 | Modified inorganic phosphate coating material |
| CN1786085A (en) * | 2004-12-08 | 2006-06-14 | 刘少光 | Super critical boiler wear resistant anticorrosion paint and its production method |
| CN105238151A (en) * | 2015-09-22 | 2016-01-13 | 安徽皖东化工有限公司 | Environment-friendly marine coating and manufacturing method thereof |
| CN109504137A (en) * | 2018-11-22 | 2019-03-22 | 深圳陶金材料科技有限公司 | A kind of high temperature resistant antiwear coating material and preparation method thereof for boiler water wall |
| CN113174560A (en) * | 2021-03-25 | 2021-07-27 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Multi-element alloy co-permeation agent for steel member passivation composite permeation layer corrosion prevention technology and preparation method thereof |
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