CN114479530A - High-compactness long-acting anti-corrosion coating suitable for heating surface of biomass boiler - Google Patents
High-compactness long-acting anti-corrosion coating suitable for heating surface of biomass boiler Download PDFInfo
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- CN114479530A CN114479530A CN202210215770.2A CN202210215770A CN114479530A CN 114479530 A CN114479530 A CN 114479530A CN 202210215770 A CN202210215770 A CN 202210215770A CN 114479530 A CN114479530 A CN 114479530A
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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
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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
- 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
- C09D5/10—Anti-corrosive paints containing metal dust
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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
- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/103—Anti-corrosive paints containing metal dust containing Al
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
Abstract
The invention discloses a high-density long-acting anticorrosive coating suitable for a heating surface of a biomass boiler, which is formed by coating the following raw materials in percentage by mass: 10-20% of high-melting-point rare metal powder; 5% -7% of aluminum silicon powder; 12 to 16 percent of rare earth; 8 to 10 percent of high-temperature resistant fiber; 11 to 17 percent of inorganic coating; 20 to 30 percent of high-temperature resistant inorganic nano composite adhesive. The high-temperature-resistant inorganic nano-composite adhesive is prepared from inorganic nano-materials through polycondensation, and the pH value of the high-temperature-resistant inorganic nano-composite adhesive is a neutral suspension dispersion system. The aluminum silicon powder is a compound composition of magnesium silicate and aluminum silicate, has a structure of a chain layer sheet crystal transparent body, has a density of 2.7-2.9 and a hardness of more than 6. The invention has the technical effects of high fire resistance, good corrosion resistance and difficult cracking and peeling.
Description
Technical Field
The invention relates to the technical field of long-acting anticorrosive coatings, in particular to a high-density long-acting anticorrosive coating suitable for a heating surface of a biomass boiler.
Background
The garbage incinerator is used for incinerating garbage, the garbage is burnt in the hearth to become waste gas, the waste gas enters the secondary combustion chamber, the waste gas is completely combusted under the forced combustion of the combustor, and then enters the spray type dust remover, and the waste gas is discharged into the atmosphere through a chimney after dust removal. The garbage incinerator consists of four systems, namely a garbage pretreatment system, an incineration system, a smoke biochemical dust removal system and a gas producer (auxiliary ignition incineration), and integrates automatic feeding, screening, drying, incineration, ash removal, dust removal and automatic control. Before practical application work, the garbage incinerator needs to be sprayed with a coating on a heating surface in a hearth, and the coating sprayed at present has the problems of easy cracking and peeling, low fire resistance and low corrosion resistance under a long-time high-temperature environment.
Therefore, the invention discloses a long-acting anticorrosive coating which has high fire resistance, good corrosion resistance effect and difficult cracking and peeling and is suitable for the heating surface of the biomass boiler.
Disclosure of Invention
The invention aims to provide a high-density long-acting anticorrosive coating suitable for a heating surface of a biomass boiler so as to solve the problems in the background technology.
In order to realize the purpose, the invention provides the following technical scheme: a high-density long-acting anticorrosive coating suitable for a heating surface of a biomass boiler is formed by coating the following raw materials in percentage by mass:
preferably, the high-temperature resistant fiber is one or a mixture of asbestos fiber, glass fiber, metal fiber, Nilapao boron fiber, ceramic fiber, carbon fiber and graphite fiber.
Preferably, the rare earth contains one or more of boride, carbide, nitride, silicide, phosphide and sulfide.
Preferably, the inorganic coating is prepared from quartz sand, clay, magnesite and dolomite as raw materials.
Preferably, the high-melting-point rare metal powder is one or a mixture of more of tungsten powder, nickel powder, chromium powder, molybdenum powder, aluminum powder and indium powder.
Preferably, the high-temperature-resistant inorganic nano-composite adhesive is prepared from an inorganic nano-material through a polycondensation reaction, and the pH value of the high-temperature-resistant inorganic nano-composite adhesive is a neutral suspension dispersion system.
Preferably, the aluminum silicon powder is a compound composition of magnesium silicate and aluminum silicate, the structure is a chain layer sheet crystal transparent body, the density is 2.7-2.9, and the hardness is more than 6.
A preparation method of a high-density long-acting anticorrosive coating suitable for a heating surface of a biomass boiler specifically comprises the following steps:
the method comprises the following steps: adding the high-temperature-resistant inorganic nano-composite adhesive and the inorganic coating in proportion into a stirring barrel for stirring and mixing;
step two: then adding high-melting-point rare metal powder and aluminum silicon powder while adding high-temperature-resistant fiber, and uniformly stirring;
step three: then adding rare earth to adjust viscosity, and obtaining the long-acting anticorrosive paint for later use after stirring and defoaming or vacuum defoaming;
step four: and finally, uniformly spraying the long-acting anticorrosive coating on the heating surface of the waste incineration boiler through a spray gun until the coating is completely dried.
Compared with the prior art, the invention has the beneficial effects that:
1. the high-compactness long-acting anticorrosive coating suitable for the heating surface of the biomass boiler is a high-temperature-resistant inorganic nano composite binder prepared from inorganic nano materials through polycondensation, and the obtained binder is a suspension dispersion system with a neutral pH value through screening of component proportion and preparation process parameters, so that the high-compactness long-acting anticorrosive coating is strong in binding power, free of corrosion to a metal matrix, capable of keeping good binding property and corrosion resistance at high temperature, long in service life, capable of ensuring the overall corrosion resistance, and capable of avoiding the problem of cracking and falling off after long-time use.
2. The high-compactness long-acting anti-corrosion coating suitable for the heating surface of the biomass boiler adopts compound silicate as the silicon-aluminum powder, and the compound composition of magnesium silicate and aluminum silicate has a structure of a chain layer sheet crystal transparent body, the density is 2.7-2.9, and the hardness is more than 6. The chemical property of the product is stable and does not react with acid and alkali. So that it is resistant to strong acid and alkali. The high-temperature-resistant aluminum alloy has excellent physical properties, resists high temperature of 1750 ℃, has good insulativity, improves acid and alkali resistance, further ensures corrosion resistance and improves high-temperature resistance.
3. The high-compactness long-acting anti-corrosion coating suitable for the heating surface of the biomass boiler takes inorganic coating as a base material, can bear the high temperature of at least 1000 ℃, can resist the temperature of 1500 ℃ or even higher, can play a good role in oxidation resistance and corrosion resistance for the thin coating, and can play a good role in oxidation resistance and corrosion resistance for the thick coating, and also can play a role in heat insulation and preservation.
4. The high-compactness long-acting anticorrosive coating suitable for the heating surface of the biomass boiler is characterized in that high-temperature-resistant fibers are added, wherein the high-temperature-resistant fibers are one or a mixture of more of asbestos fibers, glass fibers, metal fibers, nitrogen lao boron fibers, ceramic fibers, carbon fibers and graphite fibers, and the high-temperature-resistant fibers are distributed in a spacing and staggered manner, so that the close connectivity among all materials is further improved, the high temperature resistance is ensured, and the prepared coating is not easy to crack and peel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the first embodiment, the first step is,
a high-density long-acting anticorrosive coating suitable for a heating surface of a biomass boiler is formed by coating the following raw materials in percentage by mass:
in this embodiment, the high temperature resistant fiber is one or a mixture of asbestos fiber, glass fiber, metal fiber, Nilapao boron fiber, ceramic fiber, carbon fiber, and graphite fiber.
In this embodiment, the rare earth contains one or more of boride, carbide, nitride, silicide, phosphide, and sulfide.
In this embodiment, the inorganic coating is prepared from quartz sand, clay, magnesite, and dolomite as raw materials.
In this embodiment, the high melting point rare metal powder is one or a mixture of tungsten powder, nickel powder, chromium powder, molybdenum powder, aluminum powder, and indium powder.
In this embodiment, the high temperature resistant inorganic nanocomposite adhesive is prepared by performing a polycondensation reaction on an inorganic nanomaterial, and the PH of the high temperature resistant inorganic nanocomposite adhesive is a neutral suspension dispersion system.
In the embodiment, the aluminum silicon powder is a compound composition of magnesium silicate and aluminum silicate, has a structure of a chain layer sheet crystal transparent body, and has the density of 2.7-2.9 and the hardness of more than 6.
In the second embodiment, the first embodiment of the method,
a high-density long-acting anticorrosive coating suitable for a heating surface of a biomass boiler is formed by coating the following raw materials in percentage by mass:
in this embodiment, the high temperature resistant fiber is one or a mixture of asbestos fiber, glass fiber, metal fiber, nitrogen lao boron fiber, ceramic fiber, carbon fiber, and graphite fiber.
In this embodiment, the rare earth contains one or more of boride, carbide, nitride, silicide, phosphide, and sulfide.
In this embodiment, the inorganic coating is made of quartz sand, clay, magnesite, and dolomite.
In this embodiment, the high melting point rare metal powder is one or a mixture of tungsten powder, nickel powder, chromium powder, molybdenum powder, aluminum powder, and indium powder.
In this embodiment, the high temperature resistant inorganic nanocomposite adhesive is prepared by performing a polycondensation reaction on an inorganic nanomaterial, and the PH of the high temperature resistant inorganic nanocomposite adhesive is a neutral suspension dispersion system.
In the embodiment, the aluminum silicon powder is a compound composition of magnesium silicate and aluminum silicate, has a structure of a chain layer sheet crystal transparent body, and has the density of 2.7-2.9 and the hardness of more than 6.
In the third embodiment, the first step is that,
a high-density long-acting anticorrosive coating suitable for a heating surface of a biomass boiler is formed by coating the following raw materials in percentage by mass:
in this embodiment, the high temperature resistant fiber is one or a mixture of asbestos fiber, glass fiber, metal fiber, nitrogen lao boron fiber, ceramic fiber, carbon fiber, and graphite fiber.
In this embodiment, the rare earth contains one or a mixture of more of boride, carbide, nitride, silicide, phosphide, and sulfide.
In this embodiment, the inorganic coating is prepared from quartz sand, clay, magnesite, and dolomite as raw materials.
In this embodiment, the high melting point rare metal powder is one or a mixture of tungsten powder, nickel powder, chromium powder, molybdenum powder, aluminum powder, and indium powder.
In this embodiment, the high temperature resistant inorganic nanocomposite adhesive is prepared by performing a polycondensation reaction on an inorganic nanomaterial, and the PH of the high temperature resistant inorganic nanocomposite adhesive is a neutral suspension dispersion system.
In the embodiment, the aluminum silicon powder is a compound composition of magnesium silicate and aluminum silicate, has a structure of a chain layer sheet crystal transparent body, and has the density of 2.7-2.9 and the hardness of more than 6.
The preparation method of the high-density long-acting anticorrosive coating suitable for the heating surface of the biomass boiler specifically comprises the following steps:
the method comprises the following steps: adding the high-temperature-resistant inorganic nano-composite adhesive and the inorganic coating in proportion into a stirring barrel for stirring and mixing;
step two: then adding high-melting-point rare metal powder and aluminum silicon powder while adding high-temperature-resistant fiber, and uniformly stirring;
step three: then adding rare earth to adjust viscosity, and obtaining the long-acting anticorrosive paint for later use after stirring and defoaming or vacuum defoaming;
step four: and finally, uniformly spraying the long-acting anticorrosive coating on the heating surface of the waste incineration boiler through a spray gun until the coating is completely dried.
Experimental analysis: the long-acting anticorrosive coatings prepared in the first, second and third examples and the anticorrosive coatings in the prior art are respectively tested for corrosion resistance, high temperature resistance and cracking and peeling resistance, and the testing methods and results are shown in the following table:
compared with the prior art:
1. the high-compactness long-acting anticorrosive coating suitable for the heating surface of the biomass boiler is a high-temperature-resistant inorganic nano composite binder prepared from inorganic nano materials through polycondensation, and the obtained binder is a suspension dispersion system with a neutral pH value through screening of component proportion and preparation process parameters, so that the high-compactness long-acting anticorrosive coating is strong in binding power, free of corrosion to a metal matrix, capable of keeping good binding property and corrosion resistance at high temperature, long in service life, capable of ensuring the overall corrosion resistance, and capable of avoiding the problem of cracking and falling off after long-time use.
2. The high-compactness long-acting anti-corrosion coating suitable for the heating surface of the biomass boiler adopts compound silicate as the silicon-aluminum powder, and the compound composition of magnesium silicate and aluminum silicate has a structure of a chain layer sheet crystal transparent body, the density is 2.7-2.9, and the hardness is more than 6. The chemical property of the product is stable and does not react with acid and alkali. So that it is resistant to strong acid and alkali. The high-temperature-resistant aluminum alloy has excellent physical properties, resists high temperature of 1750 ℃, has good insulativity, improves acid and alkali resistance, further ensures corrosion resistance and improves high-temperature resistance.
3. The high-compactness long-acting anti-corrosion coating suitable for the heating surface of the biomass boiler takes inorganic coating as a base material, can bear the high temperature of at least 1000 ℃, can resist the temperature of 1500 ℃ or even higher, can play a good role in oxidation resistance and corrosion resistance for the thin coating, and can play a good role in oxidation resistance and corrosion resistance for the thick coating, and also can play a role in heat insulation and preservation.
4. The high-compactness long-acting anticorrosive coating suitable for the heating surface of the biomass boiler is characterized in that high-temperature-resistant fibers are added, wherein the high-temperature-resistant fibers are one or a mixture of more of asbestos fibers, glass fibers, metal fibers, nitrogen lao boron fibers, ceramic fibers, carbon fibers and graphite fibers, and the high-temperature-resistant fibers are distributed in a spacing and staggered manner, so that the close connectivity among all materials is further improved, the high temperature resistance is ensured, and the prepared coating is not easy to crack and peel.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
2. the high-density long-acting anticorrosive coating suitable for the heating surface of the biomass boiler as claimed in claim 1, wherein: the high-temperature resistant fiber is one or a mixture of more of asbestos fiber, glass fiber, metal fiber, nitrogen Laolao boron fiber, ceramic fiber, carbon fiber and graphite fiber.
3. The high-density long-acting anticorrosive coating suitable for the heating surface of the biomass boiler as claimed in claim 1, characterized in that: the rare earth contains one or more of boride, carbide, nitride, silicide, phosphide and sulfide.
4. The high-density long-acting anticorrosive coating suitable for the heating surface of the biomass boiler as claimed in claim 1, wherein: the inorganic paint is prepared by taking quartz sand, clay, magnesite and dolomite as raw materials.
5. The high-density long-acting anticorrosive coating suitable for the heating surface of the biomass boiler as claimed in claim 1, wherein: the high-melting-point rare metal powder is one or a mixture of tungsten powder, nickel powder, chromium powder, molybdenum powder, aluminum powder and indium powder.
6. The high-density long-acting anticorrosive coating suitable for the heating surface of the biomass boiler as claimed in claim 1, wherein: the high-temperature-resistant inorganic nano-composite adhesive is prepared from inorganic nano-materials through polycondensation, and the pH value of the high-temperature-resistant inorganic nano-composite adhesive is a neutral suspension dispersion system.
7. The high-density long-acting anticorrosive coating suitable for the heating surface of the biomass boiler as claimed in claim 1, wherein: the aluminum silicon powder is a compound composition of magnesium silicate and aluminum silicate, has a structure of a chain layer sheet crystal transparent body, has a density of 2.7-2.9 and a hardness of more than 6.
8. A preparation method of a high-density long-acting anticorrosive coating suitable for a heating surface of a biomass boiler is characterized by comprising the following steps of: the method specifically comprises the following steps:
the method comprises the following steps: adding the high-temperature-resistant inorganic nano-composite adhesive and the inorganic coating in proportion into a stirring barrel for stirring and mixing;
step two: then adding high-melting-point rare metal powder and aluminum silicon powder while adding high-temperature-resistant fiber, and uniformly stirring;
step three: then adding rare earth to adjust viscosity, and obtaining the long-acting anticorrosive paint for later use after stirring and defoaming or vacuum defoaming;
step four: and finally, uniformly spraying the long-acting anticorrosive coating on the heating surface of the waste incineration boiler through a spray gun until the coating is completely dried.
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