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Near-infrared radiation ceramic coating used for ethylene cracking furnace and preparation method and application of near-infrared radiation ceramic coating

A technology of near-infrared radiation and ethylene cracking furnace, which is applied in the field of near-infrared radiation ceramic coatings and its preparation, can solve the problems of reducing the actual life of coatings, cracking, poor thermal shock resistance, etc., and achieve enhanced radiation energy-saving efficiency and improved combination Strength and the effect of improving thermal shock resistance

Active Publication Date: 2018-01-09
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this kind of radiation coating is applied and used, on the one hand, it has the problems of poor bonding strength with the high-temperature-resistant alloy base at room temperature and low near-infrared radiation rate, which affects the installation and construction of ethylene cracking tubes and the improvement of energy-saving efficiency of the coating; on the other hand, these inorganic High-temperature-resistant coatings have frequent and sharp rises and falls in the furnace temperature in the ethylene cracking furnace, which will cause problems such as cracking and falling off due to poor thermal shock resistance, which will reduce the actual life of the coating.

Method used

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  • Near-infrared radiation ceramic coating used for ethylene cracking furnace and preparation method and application of near-infrared radiation ceramic coating
  • Near-infrared radiation ceramic coating used for ethylene cracking furnace and preparation method and application of near-infrared radiation ceramic coating
  • Near-infrared radiation ceramic coating used for ethylene cracking furnace and preparation method and application of near-infrared radiation ceramic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of near-infrared radiation ceramic coating for ethylene cracking furnace, composed of component A and component B,

[0047] The parts by weight of component A comprise:

[0048]

[0049] The particle diameters of borosilicate glass powder, silicon carbide, silicon dioxide, boron carbide, titanium diboride, hafnium diboride and zirconium diboride added to the paint are all 325 mesh.

[0050] The weight composition of B component comprises:

[0051] 75 parts of polyamide;

[0052] 25 parts of ethanol.

[0053] Its preparation method comprises the following steps:

[0054] (1) Borosilicate glass powder, silicon carbide, silicon dioxide, boron nitride, boron carbide, titanium boride, hafnium diboride and zirconium diboride powder are ball milled on a vibration mill for 3 hours, The ball-to-material ratio is 3:1; the mixed powder is obtained;

[0055] (2) Epoxy resin, thixotropic agent, solvent are stirred and dispersed in the reactor, and the rotating speed i...

Embodiment 2

[0060] A kind of near-infrared radiation ceramic coating for ethylene cracking furnace, composed of component A and component B,

[0061] The parts by weight of component A comprise:

[0062]

[0063] At the same time, the particle size of borosilicate glass powder, silicon carbide, silicon dioxide, boron nitride, boron carbide, titanium boride, hafnium diboride and zirconium diboride added in the coating is 300 mesh.

[0064] The weight composition of B component comprises:

[0065] 85 parts of polyamide;

[0066] 15 parts of ethanol.

[0067] Its preparation method comprises the following steps:

[0068] (1) Borosilicate glass powder, silicon carbide, silicon dioxide, boron nitride, boron carbide, titanium boride, hafnium diboride and zirconium diboride powder are ball milled on a vibration mill for 3 hours, The ball-to-material ratio is 3:1; the mixed powder is obtained;

[0069] (2) Epoxy resin, thixotropic agent, solvent are stirred and dispersed in the reactor, a...

Embodiment 3

[0074] A kind of near-infrared radiation ceramic coating for ethylene cracking furnace, composed of component A and component B,

[0075] The parts by weight of component A comprise:

[0076]

[0077] The particle size of the borosilicate glass powder, silicon carbide, silicon dioxide, boron carbide, titanium diboride, hafnium diboride and zirconium diboride added in the paint is 325 mesh.

[0078] The weight composition of B component comprises:

[0079] 80 parts of phenalkamine;

[0080] 20 parts of ethanol.

[0081] Its preparation method comprises the following steps:

[0082] (1) Borosilicate glass powder, silicon carbide, silicon dioxide, boron nitride, boron carbide, titanium boride, hafnium diboride and zirconium diboride powder are ball milled on a vibration mill for 3 hours, The ball-to-material ratio is 3:1; the mixed powder is obtained;

[0083] (2) Epoxy resin, thixotropic agent, solvent are stirred and dispersed in the reactor, and the rotating speed is 7...

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Abstract

The invention discloses a near-infrared radiation ceramic coating used for an ethylene cracking furnace. The coating includes a component I and a component II in a mass ratio of 20:1. The component Iincludes epoxy resin, borosilicate glass powder, silicon carbide, silica, boron carbide, titanium diboride, hafnium diboride, zirconium diboride, a solvent and a thixotropic agent, and the component II includes a curing agent and ethanol. The bonding strength of the coating and a high-temperature-resistant alloy base at a normal temperature and a high temperature are improved, and the thermal shock resistance of the coating is improved. The obtained coating has adhesive force at a normal temperature and a high temperature more than 5 MPa, can bear an 800-degree high temperature, has the thermal shock resistance more than 500 K / S, and is not prone to crack or peel off. The emissivity of the coating in a near-infrared band is improved, and the radiation energy-saving efficiency is improved.At a high temperature of 800-1000 DEG C, the emissivity of the coating in a near-infrared band in a range of 3-5 micrometer can reach 0.86-0.92.

Description

technical field [0001] The invention relates to the technical field of coatings. More specifically, it relates to a near-infrared radiation ceramic coating for ethylene cracking furnace and its preparation method and application. Background technique [0002] The ethylene cracking furnace is the leading and key equipment of the ethylene production plant, and its energy consumption accounts for 50% to 60% of the total energy consumption of the plant. Therefore, reducing the energy consumption of the ethylene cracking furnace is one of the important ways to reduce the cost of ethylene production. At present, the main material of the ethylene cracking furnace is 35Cr245Ni, and the long-term working temperature is 800-1100 °C, which requires the coating to have a high emissivity in the near-infrared band (3-5 μm); in addition, the ethylene cracking furnace has frequent rapid rise and fall of the furnace temperature. In this case, the coating is required to have excellent therma...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D7/61
CPCY02P20/10
Inventor 贺刚李永李宏华李江涛
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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