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Dual-corrosion-resistant weather-resistant steel enamel heat transfer elements and preparation method thereof

A technology of heat transfer elements and weathering steel, which is applied in the direction of laminated elements, heat exchange equipment, lighting and heating equipment, etc., and can solve problems such as non-corrosion resistance and lack of enamel layer protection

Inactive Publication Date: 2017-09-01
KUSN MEIBANG ENAMEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing heat transfer elements are coated with enamel layer on the surface of low carbon steel and extremely low carbon steel. The exposed bottom of the enamel at the hanging hole opened when the heat transfer element is used, the cracked enamel at the corners during use, etc., the protection of the enamel layer in these places is lacking, resulting in corrosive gas directly contacting the substrate of the enamel heat transfer element, which is not resistant to corrosion The substrate of the enamel will corrode very quickly, and the corrosion will spread from the damaged point to the adjacent area, resulting in the failure of the entire enamel heat transfer element. Most of the enamel heat transfer element damage is caused by this.
Therefore, there are still shortcomings in the use of enamel heat transfer elements of this common low-carbon steel substrate.

Method used

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  • Dual-corrosion-resistant weather-resistant steel enamel heat transfer elements and preparation method thereof
  • Dual-corrosion-resistant weather-resistant steel enamel heat transfer elements and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a double anti-corrosion weathering steel enamel heat transfer element, comprising the following steps:

[0031] (1) The weather-resistant steel substrate 2 is rolled from weather-resistant steel;

[0032] (2) Two hanging holes 8 are opened on the weathering steel substrate 2, and the transitional enamel glaze is wet-coated on the surface of the weathering steel substrate 2 and the walls of the two hanging holes to form a transitional porcelain layer 4 , the transition enamel glaze includes protective enamel glaze, nickelous oxide, cobalt oxide and clay, and the protective enamel glaze includes the following components in mass percentage: 0% Al 2 o 3 , 3% B2 o 3 , 1% BaO, 0% CaO, 0% CoO, 0% CuO, 0% F2, 0% K 2 O, 1% Li 2 O, 10% Na 2 O, 0% NiO, 75% SiO 2 , 5% TiO 2 , 5% ZrO 2 Nickel oxide accounts for 0.1% of the quality of the protective enamel glaze, cobalt oxide accounts for 0.2% of the quality of the protective enamel glaze, and clay a...

Embodiment 2

[0036] A method for preparing a double anti-corrosion weathering steel enamel heat transfer element, comprising the following steps:

[0037] (1) The weather-resistant steel substrate 2 is rolled from weather-resistant steel;

[0038] (2) Two hanging holes 8 are opened on the weathering steel substrate 2, and the transitional enamel glaze is wet-coated on the surface of the weathering steel substrate 2 and the walls of the two hanging holes to form a transitional porcelain layer 4 , the transition enamel glaze includes protective enamel glaze, nickelous oxide, cobalt oxide and clay, and the protective enamel glaze includes the following components in mass percentage: 3% Al 2 o 3 , 10% B 2 o 3 , 5% BaO, 1% CaO, 2% CoO, 1% CuO, 2% F2, 2% K 2 O, 5% Li 2 O, 15% Na 2 O, 2% NiO, 50% SiO 2 , 1% TiO 2 , 1% ZrO 2 Nickel oxide accounts for 0.3% of the quality of the protective enamel glaze, cobalt oxide accounts for 0.8% of the quality of the protective enamel glaze, and cla...

Embodiment 3

[0042] A method for preparing a double anti-corrosion weathering steel enamel heat transfer element, comprising the following steps:

[0043] (1) The weather-resistant steel substrate 2 is rolled from weather-resistant steel;

[0044] (2) Two hanging holes 8 are opened on the weathering steel substrate 2, and the transitional enamel glaze is wet-coated on the surface of the weathering steel substrate 2 and the walls of the two hanging holes to form a transitional porcelain layer 4 , the transitional enamel glaze includes protective enamel glaze, nickelous oxide, cobalt oxide and clay, and the protective enamel glaze includes the following components in mass percentage: 1% Al 2 o 3 , 7% B 2 o 3 , 2% BaO, 3% CaO, 3% CoO, 3% CuO, 3% F2, 3% K 2 O, 2% Li 2 O, 8% Na 2 O, 3% NiO, 58% SiO 2 , 2% TiO 2 , 2% ZrO 2 Nickel oxide accounts for 0.5% of the quality of the protective enamel glaze, cobalt oxide accounts for 1.5% of the quality of the protective enamel glaze, and cla...

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Abstract

The invention relates to a dual-corrosion-resistant weather-resistant steel enamel heat transfer element. The dual-corrosion-resistant weather-resistant steel enamel heat transfer element comprises a weather-resistant steel base plate, wherein a transition enamel layer is formed on the surface of the weather-resistant steel base plate; and a protection enamel layer is formed on the surface of the transition enamel layer. The invention also relates to a preparation method of dual-corrosion-resistant weather-resistant steel enamel heat transfer element. The heat transfer element has dual-corrosion-resistant performance, the weather-resistant steel base plate has certain corrosion resistant performance, corrosion resistant protection also can be provided by the transition enamel layer and the protection enamel layer; when certain defective points of the transition enamel layer and the protection enamel layer are damaged, the weather-resistant steel base plate also can moderately protect itself from quickly being corroded when the weather-resistant steel base plate is exposed, thereby greatly prolonging the service life and ensuring that glaze cost can be controlled by attaching the transition enamel layer to the weather-resistant steel base plate; moreover, the cost and the quality of the enamel can be guaranteed.

Description

technical field [0001] The invention relates to a heat transfer element of a rotary regenerative air preheater and a flue gas heat exchanger applied to a coal-fired thermal power plant, in particular to a rotary regenerative air preheater and a flue gas exchanger equipped with a desulfurization and denitrification device. A double anti-corrosion weathering steel enamel heat transfer element for a heater and a preparation method thereof. Background technique [0002] The heat transfer element is the core component of the rotary regenerative air preheater and flue gas heat exchanger. In the air preheater, the main function of the heat transfer element is to absorb the waste heat discharged from the front section of the boiler to heat the air used for boiler combustion and pulverized coal transportation. The final area of ​​the heat transfer element is tens of thousands to more than one hundred thousand square meters. heat transfer area. The heat transfer elements are general...

Claims

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Application Information

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IPC IPC(8): F28F3/00F28F19/02F28F21/08C03C8/00
CPCF28F3/00C03C8/00C03C2207/04F28F19/02F28F21/082
Inventor 张虎王宏伟
Owner KUSN MEIBANG ENAMEL
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