CN112280346A

CN112280346A - Black body anti-coking ceramic identification coating and preparation method thereof

Info

Publication number: CN112280346A
Application number: CN202011200300.6A
Authority: CN
Inventors: 牟志荣; 李丙阳
Original assignee: Zhengzhou Sanzhong Energy Technology Co ltd
Current assignee: Zhengzhou Sanzhong Energy Technology Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-01-29

Abstract

A black body anti-coking ceramic identification coating and its preparation method, the said ceramic identification coating is made up of basal layer and surface layer, the basal layer is white, the surface layer is green, the coating forming the basal layer contains zirconium dioxide, aluminium oxide, magnesium oxide, lithium fluorosilicate, manganese powder, cerium oxide, lanthanum oxide, sodium silicate, potassium silicate, magnesium hexametaphosphate, aluminium hexametaphosphate, bentonite, clay, solidified resin, modified inorganic powder, active diluent; the coating for forming the surface layer comprises ZS high-temperature resistant far infrared radiation coating, aluminum silicate, high-temperature binder, bentonite, clay, brown corundum, cordierite, colorant and dispersant; high temperature resistant far infrared radiation coating; the strong radiation material contained in the coating radiates far infrared waves with extremely strong penetrating power at high temperature, so that the molecules of a heated object absorb the waves to generate energy level transition, the absorbed energy is uniformly heated, the heating time is shortened, and the energy is fully saved.

Description

Black body anti-coking ceramic identification coating and preparation method thereof

Technical Field

The invention relates to the technical field of ceramic identification coatings, in particular to a black body anti-coking ceramic identification coating and a preparation method thereof.

Background

Traditional ceramics mainly refer to porcelains, glass, cement and refractory materials. The chemical compositions are all silicates, so the silicate material is also called. The advanced ceramics in a broad sense include artificial single crystal, amorphous state, ceramics and their composite materials, semiconductors, refractory materials and cement, also called inorganic non-metallic materials; the high-performance ceramic coating technology is an edge science which is cross-derived from a high-performance ceramic material, an advanced composite material, a modern surface engineering technology and the like, is a very active disciplinary branch in the modern new technical field, and has wide application in various fields of national economy. The development of single-phase and high-purity materials to multiphase composite ceramics comprises a fiber (or whisker) reinforced ceramic matrix composite; heterogeneous particle dispersion strengthening multiphase ceramics; self-reinforcing material combined by two or more main crystals; gradient functional composites and nano-micron composites; the development is from the micron scale (from powder to microstructure) to the nanometer scale (1-hundreds of nanometers), i.e. to the transitional structural region between atoms or molecules and conventional microstructures. Will exhibit different chemical and physical properties, such as superplasticity, electrical, magnetic properties, than previous micron-sized ceramic materials.

In the prior art, the coatings on the heating surface and the fire side surface of the high-temperature radiation metal base material of power plant boilers, industrial boilers and kilns in the industries of electric power, petroleum, petrochemical industry, metallurgy and the like have the defects of poor contamination and coking resistance, high-temperature corrosion resistance and flow rate abrasion resistance. Single layer, single color, and high later maintenance cost. The sand blasting which is repeated throughout the year influences the service life of the base material, and the severe construction environment and the high-altitude operation in the furnace cause adverse effects on the physical and psychological health of constructors.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a black body anti-coking ceramic identification coating technology and a preparation method thereof, which better overcome the problems and the defects in the prior art, can effectively prolong the service life of a base material, obviously reduce the labor and economic cost of subsequent maintenance, and realize the long-life protection of the anti-coking of a heating surface.

In order to achieve the purpose, the invention adopts the following technical scheme: a black body anti-coking ceramic identification coating comprises a base layer and a surface layer, wherein the base layer is white, the surface layer is green, and a coating forming the base layer comprises zirconium dioxide, aluminum oxide, magnesium oxide, lithium fluosilicate, manganese powder, cerium oxide, lanthanum oxide, sodium silicate, potassium silicate, magnesium hexametaphosphate, aluminum hexametaphosphate, bentonite, clay, curing resin, modified inorganic powder and an active diluent; the coating for forming the surface layer comprises ZS high-temperature resistant far infrared radiation coating, aluminum silicate, high-temperature binder, bentonite, clay, brown corundum, cordierite, colorant and dispersant; high-temperature resistant far infrared radiation coating.

Preferably, the thickness of the base layer is 1-1000 μm, and the thickness of the surface layer is 0.10-0.15 mm.

Preferably, the powder is subjected to ball milling, sieving and then mixing and stirring uniformly.

Preferably, the particle size of lanthanum oxide, cerium oxide, manganese powder, magnesium oxide, aluminum trioxide and zirconium dioxide in the coating components is 100-300 nm.

Preferably, 10-25 parts of zirconium dioxide, 10-20 parts of aluminum oxide, 15-25 parts of magnesium oxide, 3-10 parts of lithium fluosilicate, 3-10 parts of manganese powder, 1-2 parts of cerium oxide, 1-2 parts of lanthanum oxide, 20-30 parts of sodium silicate, 10-20 parts of potassium silicate, 1-2 parts of magnesium hexametaphosphate and 1-5 parts of aluminum hexametaphosphate.

A preparation method of a black body anti-coking ceramic identification coating comprises the following steps: respectively mixing and stirring the paint forming the base layer and the paint forming the surface layer for 15 minutes, adding water, stirring for 30 minutes, then hermetically placing for fully mixing to obtain base layer paint slurry and surface layer paint slurry respectively, then coating the base layer paint slurry inside a boiler by adopting a coating method, and obtaining the base layer after 24 hours at normal temperature; and then, spraying the surface layer coating slurry on the surface of the base layer by adopting a spraying method, and obtaining the ceramic identification coating after 48 hours at normal temperature.

Preferably, when the white base layer is exposed in the boiler, the surface layer coating is directly sprayed on the part where the white base layer is exposed after the floating ash on the heating surface is blown and washed clean by high-pressure air or water.

Compared with the prior art, the invention has the beneficial effects that:

(1) when the working temperature of the heating furnace is 700 ℃, the heat transfer is mainly radiation (more than 90%), when the product is used, the radiation rate of the furnace body is increased from the original 0.35 to 0.88 at high temperature, the heat absorption of the inner surface of the furnace body is greatly increased, and the radiation rate of the diamond far-infrared radiation coating is 96% at high temperature, so that the temperature of the furnace body of the heating furnace is obviously increased. The high-temperature resistant far infrared radiation coating ZS is a special functional energy-saving coating with high temperature resistance (the temperature can reach 1700 ℃), strong radiance (0.95), corrosion resistance and high wear resistance, improves heat exchange in a furnace, improves the temperature field intensity and uniformity in a hearth, enables fuel to be combusted more fully, achieves the purposes of increasing the thermal efficiency, greatly improving the thermal efficiency of refractory materials, reducing energy consumption, saving energy and prolonging the service life of a lining of the furnace body through coating infrared radiation. The strong radiation material contained in the coating radiates far infrared waves with extremely strong penetrating power at high temperature, so that the molecules of a heated object absorb the waves to generate energy level transition, the absorbed energy is uniformly heated, the heating time is shortened, and the energy is fully saved.

(2) The color difference between the surface layer and the base layer is obvious, the identification degree is high, the hidden dangers such as coking, coating falling and the like can be conveniently found in time, sand blasting is not needed, and the coating on the surface layer can be directly sprayed and repaired; the ceramic identification coating is made of nano-grade raw materials, and the obtained ceramic identification coating is a nano-ceramic coating which has strong capabilities of resisting contamination, coking, high-temperature corrosion and flowing speed and abrasion; in addition, the ceramic identification coating suitable for the metal base material can effectively prolong the service life of the base material, obviously reduce the manpower and economic cost of subsequent maintenance and realize long life cycle protection of the heated surface.

Drawings

FIG. 1 is a flow chart of a method for preparing a recognition coating of black body anti-coking ceramic.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.

Example 1

A black body anti-coking ceramic identification coating comprises a base layer and a surface layer, wherein the base layer is white, the surface layer is green, and a coating forming the base layer comprises zirconium dioxide, aluminum oxide, magnesium oxide, lithium fluosilicate, manganese powder, cerium oxide, lanthanum oxide, sodium silicate, potassium silicate, magnesium hexametaphosphate, aluminum hexametaphosphate, bentonite, clay, curing resin, modified inorganic powder and an active diluent; the coating for forming the surface layer comprises ZS high-temperature resistant far infrared radiation coating, aluminum silicate, high-temperature binder, bentonite, clay, brown corundum, cordierite, colorant and dispersant; high temperature resistant far infrared radiation coating; the thickness of the base layer is 1-1000 mu m, the thickness of the surface layer is 0.10-0.15 mm, the powder materials are subjected to ball milling and sieving, then are mixed and stirred uniformly, the particle size of lanthanum oxide, cerium oxide, manganese powder, magnesium oxide, aluminum oxide trioxide and zirconium dioxide in the coating components is 100-300 nm, 10-25 parts of zirconium dioxide, 10-20 parts of aluminum oxide, 15-25 parts of magnesium oxide, 3-10 parts of lithium fluosilicate, 3-10 parts of manganese powder, 1-2 parts of cerium oxide, 1-2 parts of lanthanum oxide, 20-30 parts of sodium silicate, 10-20 parts of potassium silicate, 1-2 parts of magnesium hexametaphosphate and 1-5 parts of aluminum hexametaphosphate.

Example 2

FIG. 1 is a flow chart of a method for preparing a recognition coating of black body anti-coking ceramic; a preparation method of a black body anti-coking ceramic identification coating comprises the following steps: respectively mixing and stirring the paint forming the base layer and the paint forming the surface layer for 15 minutes, adding water, stirring for 30 minutes, then hermetically placing for fully mixing to obtain base layer paint slurry and surface layer paint slurry respectively, then coating the base layer paint slurry inside a boiler by adopting a coating method, and obtaining the base layer after 24 hours at normal temperature; then, spraying the surface layer coating slurry on the surface of the base layer by adopting a spraying method, and obtaining the ceramic identification coating after 48 hours at normal temperature; when the white base layer is exposed in the boiler, the floating ash on the heating surface is blown and washed clean by high-pressure air or water, and then the surface coating is directly sprayed on the part where the white base layer is exposed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a black body anti-coking ceramic identification coating, ceramic identification coating comprises basic unit and top layer, and the basic unit is white, and the top layer is green, its characterized in that: the coating forming the base layer comprises zirconium dioxide, aluminum oxide, magnesium oxide, lithium fluosilicate, manganese powder, cerium oxide, lanthanum oxide, sodium silicate, potassium silicate, magnesium hexametaphosphate, aluminum hexametaphosphate, bentonite, clay, cured resin, modified inorganic powder and active diluent; the coating for forming the surface layer comprises ZS high-temperature resistant far infrared radiation coating, aluminum silicate, high-temperature binder, bentonite, clay, brown corundum, cordierite, colorant and dispersant; high-temperature resistant far infrared radiation coating.

2. The blackbody anti-coking ceramic identification coating of claim 1, wherein: the thickness of the base layer is 1-1000 μm, and the thickness of the surface layer is 0.10-0.15 mm.

3. The blackbody anti-coking ceramic identification coating of claim 1, wherein: ball milling and sieving the powder, and mixing and stirring the powder uniformly.

4. The blackbody anti-coking ceramic identification coating of claim 1, wherein: the grain diameter of lanthanum oxide, cerium oxide, manganese powder, magnesium oxide, aluminum trioxide and zirconium dioxide in the coating components is 100-300 nanometers.

5. The blackbody anti-coking ceramic identification coating according to claim 1, further comprising the following raw materials in parts by weight: 10-25 parts of zirconium dioxide, 10-20 parts of aluminum oxide, 15-25 parts of magnesium oxide, 3-10 parts of lithium fluosilicate, 3-10 parts of manganese powder, 1-2 parts of cerium oxide, 1-2 parts of lanthanum oxide, 20-30 parts of sodium silicate, 10-20 parts of potassium silicate, 1-2 parts of magnesium hexametaphosphate and 1-5 parts of aluminum hexametaphosphate.

6. A preparation method of a black body anti-coking ceramic identification coating is characterized by comprising the following steps: the production method of the ceramic identification coating comprises the following steps: respectively mixing and stirring the paint forming the base layer and the paint forming the surface layer for 15 minutes, adding water, stirring for 30 minutes, then hermetically placing for fully mixing to obtain base layer paint slurry and surface layer paint slurry respectively, then coating the base layer paint slurry inside a boiler by adopting a coating method, and obtaining the base layer after 24 hours at normal temperature; and then, spraying the surface layer coating slurry on the surface of the base layer by adopting a spraying method, and obtaining the ceramic identification coating after 48 hours at normal temperature.

7. The method of making a blackbody anti-coking ceramic identification coating according to claim 6, wherein: when the white base layer is exposed in the boiler, the floating ash on the heating surface is blown and washed clean by high-pressure air or water, and then the surface coating is directly sprayed on the part where the white base layer is exposed.