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Flue gas pipeline, preparation method thereof and waste incineration flue gas recovery device

A pipeline and flue gas technology, applied in electrolytic coatings, nanotechnology, coatings, etc., can solve problems such as pipeline corrosion, achieve the effect of improving anticorrosion performance, solving serious corrosion, and improving stability and service life

Active Publication Date: 2019-04-26
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a flue gas pipe, its preparation method and waste incineration flue gas recovery device, so as to solve the problem in the prior art that the flue gas produced by waste incineration corrodes the pipe seriously

Method used

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  • Flue gas pipeline, preparation method thereof and waste incineration flue gas recovery device

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preparation example Construction

[0026] According to the third aspect of the present invention, there is also provided a method for preparing a flue gas pipe, which includes the following steps: providing a pipe body; providing a Ni-Cr nano-coating on the inner surface of the pipe body to obtain a flue gas pipe. The use of Ni-Cr nano-coating can effectively improve the high-temperature corrosion resistance of the flue gas pipe surface, thereby solving the problem of serious corrosion of flue gas pipes caused by waste incineration flue gas, thereby improving the stability of the flue gas recovery and purification device and service life.

[0027] In a preferred embodiment, the step of setting the Ni-Cr nano-coating on the inner surface of the pipeline body includes: mixing the nickel plating solution with Cr nanoparticles to obtain a mixed plating solution; DC electroplating to form a Ni-Cr nano coating on the inner surface of the pipe body. By adopting the above direct current electroplating method, using th...

Embodiment 1

[0034] In this embodiment, a Ni-Cr nanometer high temperature chloride corrosion resistant coating is prepared on the surface of the 304 stainless steel flue gas pipe using a nanocomposite electroplating process, wherein the electroplating temperature is 30 ° C, and the current density I = 3A / dm 2 . During the co-deposition process of Cr nanoparticles (the average particle size is 15nm) and Ni, mechanical stirring is adopted, and the stirring speed is 180rpm, wherein the composition of the nickel plating solution is as follows: NiSO 4 ·6H 2 O 100g / L, C 6 h 5 NaO 7 2H 2 O 110g / L, NaCl 10g / L, HBO 3 20g / L, the surfactant is cetyltrimethylammonium bromide (CTAB) 1mol / l and cetylpyridinium bromide (HPB) 0.5mol / l, the content of Cr nanoparticles is 200g / L.

[0035] According to the energy spectrum detection of the electron scanning electron microscope, the Cr content of the Ni-Cr nanocomposite coating is 15wt%, and the thickness is 30 μm.

Embodiment 2

[0037] In this embodiment, a Ni-Cr nanometer high temperature chloride corrosion resistant coating is prepared on the surface of the 304 stainless steel flue gas pipe using a nanocomposite electroplating process, wherein the electroplating temperature is 40 ° C, and the current density I = 3A / dm 2 . During the co-deposition process of Cr nanoparticles (the average particle size is 34nm) and Ni, mechanical stirring is adopted, and the stirring speed is 300rpm, wherein the composition of the nickel plating solution is as follows: NiSO 4 ·6H 2 O 200g / L, C 6 h 5 NaO 7 2H 2 O 200g / L, NaCl 30g / L, HBO 3 30g / L, the surfactant is cetyltrimethylammonium bromide (CTAB) 1mol / l and cetylpyridinium bromide (HPB) 0.5mol / l, the content of Cr nanoparticles is 300g / L.

[0038] According to the energy spectrum detection of the electron scanning electron microscope, the Cr content of the Ni-Cr nanocomposite coating is 30wt%, and the thickness is 30 μm.

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Abstract

The invention provides a flue gas pipeline, a preparation method of the flue gas pipeline and a waste incineration flue gas recovery device. The flue gas pipeline comprises a pipeline body and a Ni-Crnano coating, and the Ni-Cr nano coating is arranged on the inner surface of the pipeline body. The anti-corrosion performance of the surface of the waste incineration flue gas pipeline can be effectively improved through the Ni-Cr nano coating, therefore the problem that flue gas generated by waste incineration has serious corrosion to the flue gas pipeline is solved, and the stability and service life of flue gas recovery and purification device are increased.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a flue gas pipe, a preparation method thereof and a waste incineration flue gas recovery device. Background technique [0002] As the country pays more and more attention to ecological and environmental issues, the flue gas generated in petroleum, metallurgy, chemical industry and other industries needs to be recovered and purified to meet the emission standards stipulated by the state, which is an important task for atmospheric environment governance. It is very important work to apply waste incineration treatment technology to treat domestic and medical waste, which has the advantages of light weight and reduction, but the fly ash produced after waste incineration contains dioxins and heavy metals, etc., and there are secondary pollution problems. [0003] Due to the high water content and chlorine content of the fly ash produced by waste incineration, accompanied by a large amou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D7/04C25D15/00C25D3/12C22C19/05B82Y40/00
CPCB82Y40/00C22C19/058C25D3/12C25D7/04C25D15/00
Inventor 秦丽娟孙宁磊曹敏刘苏宁刘国
Owner CHINA ENFI ENGINEERING CORPORATION
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