CN114164390B - High-temperature energy-saving electric arc spraying powder core wire for electric coal-fired boiler - Google Patents
High-temperature energy-saving electric arc spraying powder core wire for electric coal-fired boiler Download PDFInfo
- Publication number
- CN114164390B CN114164390B CN202111097547.4A CN202111097547A CN114164390B CN 114164390 B CN114164390 B CN 114164390B CN 202111097547 A CN202111097547 A CN 202111097547A CN 114164390 B CN114164390 B CN 114164390B
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- powder
- far infrared
- wire
- infrared ceramic
- fired boiler
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- 239000000843 powder Substances 0.000 title claims abstract description 90
- 238000005507 spraying Methods 0.000 title claims abstract description 14
- 238000010891 electric arc Methods 0.000 title claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims abstract description 23
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000003245 coal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 claims description 5
- 238000000975 co-precipitation Methods 0.000 claims description 5
- 150000002484 inorganic compounds Chemical class 0.000 claims description 5
- 229910010272 inorganic material Inorganic materials 0.000 claims description 5
- 239000007791 liquid phase Substances 0.000 claims description 5
- 150000002739 metals Chemical class 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 abstract description 13
- 238000000576 coating method Methods 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007751 thermal spraying Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 12
- 238000007599 discharging Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/131—Wire arc spraying
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to a thermal spraying material, in particular to a high-temperature energy-saving electric arc spraying powder core wire for an electric coal-fired boiler, and belongs to the technical field of energy-saving new materials. The powder core in the wire comprises the following chemical components in percentage by mass: cr 2O3 powder: 18-28%, co 2O3 powder: 5-10%, ni 2O3: 12-18%, coFeO 4 powder: 6-14%, niFe 2O4 powder: 10-15%, mnO 2 powder: 5-9% of CuO powder: 3-7 percent of far infrared ceramic powder: the balance. The prepared coating has excellent bonding strength and high-temperature energy-saving effect, and can be used for replacing far infrared coating which is short in service life and easy to fall off in the market, so that the thermal efficiency of an electric coal-fired boiler can be greatly improved.
Description
Technical Field
The invention relates to a thermal spraying material, in particular to a high-temperature energy-saving electric arc spraying powder core wire for an electric coal-fired boiler, and belongs to the technical field of energy-saving new materials.
Background
The electric coal-fired boiler is one of important equipment for energy conversion, and the annual coal consumption of the boiler currently operated in China accounts for about 60-70% of the total national coal yield. How to save energy and improve heat efficiency of the boiler is a key problem in boiler design and operation.
To increase the heat efficiency of a coal-fired boiler, it is necessary to intensify the combustion of the coal fed to the boiler to reduce the heat loss of incomplete combustion and the heat loss of the boiler exhaust smoke.
The expression form of the heat loss of the boiler is as follows: firstly, the incomplete combustion heat loss of coal fuel is caused by insufficient oxygen supply, so that the combustion is insufficient, the temperature of a hearth is reduced, the combustible gas is taken away by flue gas after incomplete combustion, and the chemical incomplete heat loss of a boiler is increased. And secondly, the smoke-discharging heat loss boiler is heated, coked and seriously scaled, so that the heat absorption capacity of the boiler is reduced, the smoke-discharging temperature is increased, and the smoke-discharging loss is increased. Thirdly, the heat conduction loss of the boiler is caused, and the heat generated by burning the coal fuel is lost due to the low heat transfer efficiency of the boiler.
The above causes the increase of carbon content in the residue, which seriously affects the thermal efficiency of the boiler. Therefore, the heat efficiency of the boiler is improved, and the optimization of combustion is urgent. In order to improve the combustion rate of combustion, the power plant generally adopts the adjustment of air quantity to strengthen the combustion quality and ensure sufficient oxygen supply during combustion. And then, by matching with measures such as improving the environment of coal combustion, improving various adjustment process parameters of the hearth temperature and the like, the heat efficiency can be improved.
However, if the coal quality is greatly changed in the operation of the utility boiler, the original design value is deviated more, so that the defects of the boiler body are caused, the problem is basically solved, the conventional method is to finish the improvement through the improvement of the boiler system, but the improvement is not only costly, but also the effect is very little even if the improvement is locally realized due to the fact that the space has no position and the improvement is difficult.
Disclosure of Invention
The invention aims to provide a high-temperature energy-saving electric arc spraying powder core wire for an electric coal-fired boiler, which has the characteristics of large-area construction on site, low cost, stable coating performance, corrosion and wear resistance, higher coating bonding strength than far infrared coating and the like, and can be widely applied to electric boilers and other industrial coal-fired boilers. The prepared coating has excellent bonding strength and high-temperature energy-saving effect, and can be used for replacing far infrared coating which is short in service life and easy to fall off in the market, so that the thermal efficiency of an electric coal-fired boiler can be greatly improved.
The invention adopts the following technical scheme for realizing the purposes: the high-temperature energy-saving electric arc spraying powder core wire for the electric coal-fired boiler comprises the following chemical components in percentage by mass: cr 2O3 powder: 18-28%, co 2O3 powder: 5-10%, ni 2O3: 12-18%, coFeO 4 powder: 6-14%, niFe 2O4 powder: 10-15%, mnO 2 powder: 5-9% of CuO powder: 3-7 percent of far infrared ceramic powder: the balance.
Further, the mass percentage of the far infrared ceramic powder is not less than 22% in the total content of the powder core wire.
Further, the preparation process of the far infrared ceramic powder comprises the following steps: the far infrared ceramic powder is prepared by mixing various inorganic compounds, trace metals and natural ores and then adopting a liquid phase coprecipitation method, and the far infrared ceramic material is radiated.
Further, the granularity of the far infrared ceramic powder is 100nm.
Further, the outer skin of the wire adopts an H08 low-carbon steel strip.
Further, the powder core in the wire accounts for 34-42% of the mass of the wire.
The granularity of the powder of the various metal oxides of the powder core is 60 to 320 meshes,
The invention has the beneficial effects that:
The coating of the invention belongs to a composite coating constructed by a metal coating and a special ceramic coating, and has excellent infrared emission performance and corrosion and wear resistance, the heat conductivity of the coating is close to that of a 20G boiler tube at normal temperature, meanwhile, the heat radiation (blackness) of the inner wall of a boiler furnace can reach 0.83-0.88, the far infrared radiation heating is enhanced, a large amount of heat transferred to the inner wall of the furnace is converted into far infrared heat (electromagnetic wave) to be radiated back to the furnace and become a heat source of the boiler furnace again, the temperature in the boiler furnace is increased, the temperature field in the boiler furnace is more uniform, the combustion of fuels such as coal is more complete, the carbon content of the slag is reduced, and the waste of non-renewable resources such as coal is reduced.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
Example 1
The high-temperature energy-saving electric arc spraying powder core wire for the electric coal-fired boiler comprises the following chemical components in percentage by mass: cr 2O3 powder: 18%, co 2O3 powder: 5%, ni 2O3% powder: 12%, coFeO 4 powder: 12%, niFe 2O4 powder: 15%, mnO 2 powder: 9%, cuO powder: 7 percent of far infrared ceramic powder: 22%.
Further, the preparation process of the far infrared ceramic powder comprises the following steps: the far infrared ceramic powder is prepared by mixing various inorganic compounds, trace metals and natural ores and then adopting a liquid phase coprecipitation method, and the far infrared ceramic material is radiated.
Further, the granularity of the far infrared ceramic powder is 100nm.
Further, the outer skin of the wire adopts an H08 low-carbon steel strip.
Further, the powder core in the wire accounts for 34-42% of the mass of the wire.
Example 2
The high-temperature energy-saving electric arc spraying powder core wire for the electric coal-fired boiler comprises the following chemical components in percentage by mass: cr 2O3 powder: 25%, co 2O3 powder: 10%, ni 2O3 powder: 18%, coFeO 4 powder: 6%, niFe 2O4 powder: 10%, mnO 2 powder: 5% of CuO powder: 3 percent of far infrared ceramic powder: 23%.
Further, the preparation process of the far infrared ceramic powder comprises the following steps: the far infrared ceramic powder is prepared by mixing various inorganic compounds, trace metals and natural ores and then adopting a liquid phase coprecipitation method, and the far infrared ceramic material is radiated.
Further, the granularity of the far infrared ceramic powder is 100nm.
Further, the outer skin of the wire adopts an H08 low-carbon steel strip.
Further, the powder core in the wire accounts for 34-42% of the mass of the wire.
Example 3
The high-temperature energy-saving electric arc spraying powder core wire for the electric coal-fired boiler comprises the following chemical components in percentage by mass: cr 2O3 powder: 24%, co 2O3 powder: 6%, ni 2O3 powder: 13%, coFeO 4 powder: 7%, niFe 2O4 powder: 15%, mnO 2 powder: 6%, cuO powder: 4 percent of far infrared ceramic powder: 25%.
Further, the preparation process of the far infrared ceramic powder comprises the following steps: the far infrared ceramic powder is prepared by mixing various inorganic compounds, trace metals and natural ores and then adopting a liquid phase coprecipitation method, and the far infrared ceramic material is radiated.
Further, the granularity of the far infrared ceramic powder is 100nm.
Further, the outer skin of the wire adopts an H08 low-carbon steel strip.
Further, the powder core in the wire accounts for 34-42% of the mass of the wire.
The manufacturing process of the invention is exemplified as follows:
1. Firstly rolling H08 mild steel strip with thickness of 0.35mm and width of 16.5mm into U shape, and adding mixed powder containing the above-mentioned invention components accounting for 40% of total weight of spray powder core wire material into U-shaped groove.
2. And (3) closing the U-shaped groove into an O shape, wrapping the powder therein, then carrying out drawing and reducing by a wire drawing machine one by one, and finally obtaining the wire product of the invention by the diameter of the powder core wire reaching a specified value of 2.0 mm.
The special powder core wire material developed by the invention is constructed on a furnace tube metal matrix subjected to surface sand blasting roughening treatment according to common electric arc spraying process parameters, the obtained coating has the thickness of 0.3-0.5mm, the surface is fine and uniform, the porosity is less than 5%, and the coating and the surface of the boiler tube have higher bonding strength (higher than 35MPa at normal temperature).
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides an electric power coal fired boiler high temperature energy-conserving electric arc spraying powder core wire, its characterized in that:
The powder core in the wire comprises the following chemical components in percentage by mass: cr 2O3 powder: 18-28%, co 2O3 powder: 5-10%, ni 2O3: 12-18%, coFeO 4 powder: 6-14%, niFe 2O4 powder: 10-15%, mnO 2 powder: 5-9% of CuO powder: 3-7 percent of far infrared ceramic powder: the balance;
the mass percentage of the far infrared ceramic powder is not less than 22% in the total content of the powder core wires;
the powder core in the wire accounts for 34-42% of the mass of the wire.
2. The high temperature energy saving arc spraying powder core wire for an electric coal fired boiler according to claim 1, wherein: the preparation process of the far infrared ceramic powder comprises the following steps: the far infrared ceramic powder is prepared by mixing various inorganic compounds, trace metals and natural ores and then adopting a liquid phase coprecipitation method, and the far infrared ceramic material is radiated.
3. The high temperature energy saving arc spraying powder core wire for electric coal fired boiler according to claim 2, characterized in that: the granularity of the far infrared ceramic powder is 100nm.
4. The high temperature energy saving arc spraying powder core wire for electric coal fired boiler according to claim 2, characterized in that: the outer skin of the wire adopts H08 low carbon steel strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111097547.4A CN114164390B (en) | 2021-09-18 | 2021-09-18 | High-temperature energy-saving electric arc spraying powder core wire for electric coal-fired boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111097547.4A CN114164390B (en) | 2021-09-18 | 2021-09-18 | High-temperature energy-saving electric arc spraying powder core wire for electric coal-fired boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114164390A CN114164390A (en) | 2022-03-11 |
| CN114164390B true CN114164390B (en) | 2024-05-03 |
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| CN202111097547.4A Active CN114164390B (en) | 2021-09-18 | 2021-09-18 | High-temperature energy-saving electric arc spraying powder core wire for electric coal-fired boiler |
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| CN (1) | CN114164390B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5294462A (en) * | 1990-11-08 | 1994-03-15 | Air Products And Chemicals, Inc. | Electric arc spray coating with cored wire |
| CN101492801A (en) * | 2009-03-02 | 2009-07-29 | 北京球冠科技有限公司 | Strong wear-resistant arc spraying wire containing Ti(C,N) hard phase |
| CN102660152A (en) * | 2012-04-20 | 2012-09-12 | 湖南信诺颜料科技有限公司 | Formulation of dry burning-resistant and burning-resistant inorganic pigment and preparation method of pigment |
| CN102912277A (en) * | 2012-11-07 | 2013-02-06 | 郑州九环科贸有限公司 | Cored wire for electric arc spraying |
| CN103014591A (en) * | 2012-12-18 | 2013-04-03 | 苏州赛格瑞新材料有限公司 | Method for preparing infrared radiation amorphous coating |
| CN105924184A (en) * | 2016-04-20 | 2016-09-07 | 浙江大学 | High-temperature infrared radiant coating used for industrial furnace and preparation method thereof |
| CN106957545A (en) * | 2017-05-02 | 2017-07-18 | 珠海市澜诺新材料科技有限公司 | One kind utilizes functional paint made from far-infared ceramic powder and preparation method thereof |
| JP2018199855A (en) * | 2017-05-29 | 2018-12-20 | 日立造船株式会社 | Manufacturing method of thermal spray material, thermal spray material, thermal spray method and thermal spray product |
-
2021
- 2021-09-18 CN CN202111097547.4A patent/CN114164390B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5294462A (en) * | 1990-11-08 | 1994-03-15 | Air Products And Chemicals, Inc. | Electric arc spray coating with cored wire |
| CN101492801A (en) * | 2009-03-02 | 2009-07-29 | 北京球冠科技有限公司 | Strong wear-resistant arc spraying wire containing Ti(C,N) hard phase |
| CN102660152A (en) * | 2012-04-20 | 2012-09-12 | 湖南信诺颜料科技有限公司 | Formulation of dry burning-resistant and burning-resistant inorganic pigment and preparation method of pigment |
| CN102912277A (en) * | 2012-11-07 | 2013-02-06 | 郑州九环科贸有限公司 | Cored wire for electric arc spraying |
| CN103014591A (en) * | 2012-12-18 | 2013-04-03 | 苏州赛格瑞新材料有限公司 | Method for preparing infrared radiation amorphous coating |
| CN105924184A (en) * | 2016-04-20 | 2016-09-07 | 浙江大学 | High-temperature infrared radiant coating used for industrial furnace and preparation method thereof |
| CN106957545A (en) * | 2017-05-02 | 2017-07-18 | 珠海市澜诺新材料科技有限公司 | One kind utilizes functional paint made from far-infared ceramic powder and preparation method thereof |
| JP2018199855A (en) * | 2017-05-29 | 2018-12-20 | 日立造船株式会社 | Manufacturing method of thermal spray material, thermal spray material, thermal spray method and thermal spray product |
Non-Patent Citations (1)
| Title |
|---|
| 电弧喷涂粉芯丝材的研究进展与应用;黄林兵;余圣甫;邓宇;戴明辉;徐慧子;;材料导报;20110210(03);全文 * |
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