Natural gas engine test system for exhaust gas-fuel catalytic reforming and catalyst regeneration, and control method

A catalytic reforming and test system technology, which is applied in the field of natural gas engine test system and control, can solve the problems of difficult dismantling and replacement, high price and high cost of reforming catalyst, and achieve the effect of avoiding catalyst deactivation

Active Publication Date: 2019-12-06
WUHAN UNIV OF TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Since the catalyst is usually installed in the tube bundle inside the reformer, it is not easy to remove and replace; on the one hand, the reformer is usually in a high temperature state when it is working, and the temperature of the catalyst on the surface and inside of the reactor is very high. The catalyst can only be taken out after cooling, and it takes time and effort to replace the new catalyst; on the other hand, the prepared reforming catalyst is usually expensive, and the cost of replacing the new catalyst is relatively high at this time

Method used

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  • Natural gas engine test system for exhaust gas-fuel catalytic reforming and catalyst regeneration, and control method
  • Natural gas engine test system for exhaust gas-fuel catalytic reforming and catalyst regeneration, and control method

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Embodiment Construction

[0021] Such as figure 1 The shown exhaust gas-fuel catalytic reforming and catalyst regeneration natural gas engine test system includes reformer 1, engine 2, mixer 9, intercooler 8, tee pipe 10, gas tank 3, flow regulating valve 4, and controller 22. H 2 Tank 11 and N 2 Tank 12; wherein, the reaction gas inlet 1A of the reformer 1 is connected to the engine exhaust pipe 14 through the first exhaust branch pipe 21A, and the first exhaust branch pipe 21A is provided with a REGR front-end valve 5, and the exhaust gas of the reformer 1 The inlet 1B is connected to the engine exhaust pipe 14 through the second exhaust branch pipe 21B, the engine exhaust pipe 14 is connected to the exhaust port of the engine, and the reformer gas outlet 1C of the reformer 1 is connected to the inlet a of the tee pipe 10 , the outlet b of the tee pipe 10 is connected in series with the intercooler 8 and the mixer 9 in sequence through the reformed gas bypass pipe 16 (the reformed gas bypass pipe 1...

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Abstract

The invention discloses a natural gas engine test system for exhaust gas-fuel catalytic reforming and catalyst regeneration, and a control method. Partial exhaust gas waste heat is utilized to carry out an exhaust gas reforming hydrogen production reaction, the hydrogen-rich mixed gas generated by reforming is introduced into an engine to explore an influence rule of working parameters of a reformer on the engine performance and emission, and the matching of the reformer and the engine performance is realized. Meanwhile, for the catalyst deactivation problem in the reformer, a catalyst can bereduced online; in addition, after an experiment is finished, N2 is inflated into the reformer by a rack, an inert atmosphere is formed to protect the catalyst, and the problem of the catalyst deactivation caused by oxidation of residual exhaust gases inside the reformer in the cooling process is avoided.

Description

technical field [0001] The invention relates to the technical field of natural gas engine testing, in particular to a natural gas engine testing system and control method for exhaust gas-fuel catalytic reforming and catalyst regeneration. Background technique [0002] Exhaust gas-fuel reforming technology uses exhaust gas-fuel reformer to catalyze a small amount of fuel and part of exhaust gas to generate hydrogen-rich reformed gas by using the waste heat of high-temperature exhaust gas from the engine. The reformed gas contains H 2 、CH 4 And CO, etc., passing into the engine can improve engine combustion and reduce pollutant emissions. [0003] At present, the catalyst used in most exhaust gas fuel reformers is Ni-Rh / Al 2 o 3 etc. In the actual bench test, after a long time of catalytic reforming test, there are phenomena such as catalyst sintering, carbon deposition or oxidation of active sites, resulting in a decrease in catalyst activity. At the same time, after the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/04F02M25/12F01N5/02
CPCF01N5/02F02M25/12G01M15/04Y02T10/12
Inventor 李格升龙焱祥张尊华吴仁民钱航
Owner WUHAN UNIV OF TECH
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