Method for cooling high temperature parts through catalytic reforming of liquid hydrocarbon fuel

A technology of hydrocarbon fuels and high-temperature components, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve problems such as insufficient cooling capacity, achieve fast flame propagation speed, low ignition energy, and reduce coking effects

Active Publication Date: 2012-07-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for catalytic reforming of liquid hydrocarbon fuels to cool high-temperature parts in view of the insufficient cooling capacity and coking problems of liquid hydrocarbon fuels on high-temperature walls at present, that is, to use hydrocarbon fuels and water vapor to act on catalysts Under the endothermic reaction process, it is applied in the regenerative cooling process of high-temperature components; because its physical and chemical heat sinks are greater than the heat sink value of liquid hydrocarbon fuel itself, in addition, the water-gas reaction under high-temperature anoxic conditions can be greatly reduced The coking of hydrocarbon fuels can enhance the cooling effect, increase the proportion of combustible gases in fuels, and improve the ignition and combustion characteristics of fuels

Method used

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  • Method for cooling high temperature parts through catalytic reforming of liquid hydrocarbon fuel
  • Method for cooling high temperature parts through catalytic reforming of liquid hydrocarbon fuel
  • Method for cooling high temperature parts through catalytic reforming of liquid hydrocarbon fuel

Examples

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Effect test

Embodiment 1

[0024] Using kerosene as hydrocarbon fuel, under the condition of 3MPa pressure and water mixing ratio of 30%, the total heat sink (heat absorption) is 2.2MJ / kg when the wall temperature is 400°C, compared with the total heat of pure kerosene without catalytic reforming reaction The weight increases by 1MJ / kg; the volume content of hydrogen in the catalyzed reaction product reaches 80% when the wall temperature is 400°C, and reaches 20% when the wall temperature is 800°C.

Embodiment 2

[0026] Using dodecane as hydrocarbon fuel, under the conditions of 8MPa pressure and 50% water mixing ratio, the total heat sink reaches 4.5MJ / kg when the wall temperature is 800°C, and the hydrogen volume content in the catalyzed reaction product reaches 15%. Under the same wall heat flux condition, the surface temperature of the high-temperature parts with the catalytic section decreases by 200°C.

Embodiment 3

[0028] Using diesel oil as hydrocarbon fuel, under the conditions of 0.2MPa and 5% water, the total heat sink is 2MJ / kg when the wall temperature is 420°C, and the hydrogen volume content in the catalyzed reaction product reaches 85%.

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Abstract

The invention discloses a method for cooling high temperature parts through catalytic reforming of a liquid hydrocarbon fuel, and in particular relates to a process method for cooling high temperature parts. The liquid hydrocarbon fuel and water are blended and preheated to be vaporized into mixed vapor of hydrocarbon fuel vapor and water vapor, the mixed vapor enters a catalytic reforming reaction cooling section on the surface of a high temperature part, a reforming endothermic reaction is generated on the surface of a catalyst, and the surface temperature of the high temperature part is reduced; meanwhile, combustible gas rich in hydrogen is generated and is sprayed through a fuel nozzle or a convergent nozzle to form a combustible gaseous mixed fuel required by combustion. By the method, the cooling amount is great, the surface temperature of the high temperature part is effectively reduced, the coking of a cooling channel is relieved, and an effect of cooling the high temperaturepart and the characteristics of the fuel are improved.

Description

technical field [0001] The patent of the present invention relates to a new method for cooling (or thermal protection) of high-temperature components, in particular to a cooling method for catalytic reforming of liquid hydrocarbon fuel. Background technique [0002] In the power plant, due to the large amount of heat released by the combustion chamber, the temperature of high-temperature components such as the wall of the engine combustion chamber and the surface of the gas turbine blade continues to rise. Due to the limited heat resistance of the material, regenerative cooling of the fuel is often required, that is, using The flow heat exchange of the fuel reduces the temperature of the wall surface and the surface of the blade, and at the same time, the fuel heats up by utilizing the heat loss of the wall surface, which can effectively improve the thermal efficiency. [0003] However, with the continuous improvement of the performance of the power plant and the gradual inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/32
Inventor 侯凌云
Owner TSINGHUA UNIV
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