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Performance determination method for anti-coking coating of boiler heating surface tube

A heating surface tube and measuring method technology, applied in the direction of measuring device, strength characteristics, material thermal conductivity, etc., can solve the problems of confusion, lack of anti-coking coating performance evaluation methods, and different spraying effects, etc. Conducive to the rectification and healthy development of the industry, and the effect of novel design

Inactive Publication Date: 2017-01-04
GUODIAN NANJING ELECTRIC POWER TEST RES CO LTD
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AI Technical Summary

Problems solved by technology

[0004] However, due to the current chaos in the spraying market and the lack of performance evaluation methods for anti-coking coatings, the spraying effects vary widely

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This example takes the anti-coking spraying of water-cooled wall tubes near the boiler burner in a thermal power plant as an example. The spraying material is RSL high-temperature nano-ceramics. The essence of high-temperature nano-ceramic coating is to use compressed air on the surface of the metal substrate to spray an ultra-fine and ultra-thin composite nano-ceramic coating at room temperature, dry and solidify, and sinter with the furnace heating process, forming a layer on the surface of the substrate. Layer ceramic coating.

[0040] The invention is used to measure the performance of the anti-coking coating of the water-cooled wall tube near the burner, and the measurement standards and processes are as follows.

[0041] 1) Coating thickness: thickness 0.07 ~ 0.1mm.

[0042] The main reasons are: too thin can not effectively cover the roughness of the pipe substrate; too thick and because the thermal expansion of the coating is quite different from that of the pi...

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PUM

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Abstract

The invention discloses a performance determination method for an anti-coking coating of a boiler heating surface tube, which comprises the steps of 1) measuring the coating thickness, and determining the coating thickness uniformity; 2) carrying out microstructure morphology inspection on the coating, and determining the micro-morphology and the phase structure; 3) performing a thermal shock test on the coating, and determining the cold-hot alternating resistance capacity of the coating; 4) testing heat transfer characteristics of the coating; and 5) performing a coking and slagging test in a test platform, and determining the coking and slagging resistance performance of the coating under a laboratory condition. The method disclosed by the invention can comprehensively determine anti-coking effects of the coating, provides a determination system for authenticating the performance of the anti-coking coating, and is simple and reliable.

Description

technical field [0001] The invention relates to a method for measuring the performance of an anti-coking coating of a boiler heating surface tube. Background technique [0002] The production of high-sulfur coal and high-sodium coal in Southwest China and Xinjiang is relatively large. After the thermal power boiler is mixed with coal, it will cause particularly serious coking and slagging of the heating surface tube of the boiler, which will seriously affect the heat transfer of the boiler heating surface tube. Thermal performance will lead to overheating of boiler heating surface tubes or accelerate the generation and shedding of scale, which will cause frequent explosion of boiler heating surface tubes. [0003] One of the most effective ways to prevent coking of the heating surface tube is to implement anti-coking spraying. [0004] However, due to the current chaos in the spraying market and the lack of performance evaluation methods for anti-coking coatings, the sprayi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/08G01B15/04G01N23/22G01N3/60G01N25/18G01N33/00
CPCG01B21/08G01B15/04G01N3/60G01N23/2251G01N25/18G01N33/00
Inventor 代真蔡培张云华邱质彬黄启龙谢航云
Owner GUODIAN NANJING ELECTRIC POWER TEST RES CO LTD
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