Vehicle-mounted exhaust gas diesel oil reformer capable of preventing thermal oxidation coking problem

Abstract

The invention discloses a vehicle-mounted exhaust gas diesel oil reformer capable of preventing a thermal oxidation coking problem. The vehicle-mounted exhaust gas diesel oil reformer capable of preventing the thermal oxidation coking problem comprises an engine cylinder, a diesel engine after-treatment device, an OSC deoxidization device, a reforming water tank, a reformer, a reforming oil tank and a gas return pipe; an exhaust manifold is wound around the reformer; the diesel engine after-treatment device is connected with the OSC deoxidization device and the exhaust manifold; one outlet ofthe OSC deoxidization device is connected with a cooling pipeline in the reforming water tank; the other end of the cooling pipeline in the reforming water tank is connected with the reforming oil tank; the reforming water tank is connected to the reformer through a water injection pump; the reforming oil tank is connected with the reformer through the gas return pipe; an outlet of the reformer iscorrespondingly connected to the gas return pipe and the OSC deoxidization device; and the other end of the gas return pipe is connected with a gas intake branch. After engine after-treatment exhaustgas is deoxidized and cooled, dissolved oxygen in a fuel is replaced with cooled and deoxidized exhaust gas; and by constructing an oxygen-free reforming environment, the thermal oxidation coking problem in the fuel reforming reaction process is improved.

Description

technical field [0001] The invention relates to a vehicle-mounted exhaust gas diesel reformer, in particular to a vehicle-mounted exhaust gas diesel reformer which improves the problem of thermal oxidation and coking in the reforming reaction process. Background technique [0002] Coking refers to thermal oxidation coking or pyrolysis coking of fuel oil at high temperature, which produces large molecular carbon particles and further generates coking deposits. Coking products will bring many disadvantages. For example, if coking occurs in the vehicle-mounted fuel reformer, the coking products will adhere to the wall of the reformer, which will increase the thermal resistance of the wall, deteriorate the heat transfer quality, and affect the performance of the reformer. If the coking product falls off, it will flow to the engine nozzle with the pipeline, block the nozzle, cause the performance of the injector to decline, and then affect the combustion efficiency. In severe cas...

AI Technical Summary

Problems solved by technology

Since the reforming reaction temperature is high and the reaction environment contains some oxygen, it is easy to cause thermal oxidation and coking during the reforming process, which affects the performance of the reformer.

[0003] As we all know, the combustion of diesel engine belongs to the oxygen-enriched combustion with high air-fuel ratio, so the oxygen content in the exhaust gas is as high as about 10%. Carrying out reforming, although due to the high oxygen content, it promotes partial oxygen reforming reaction, which is beneficial to fuel reforming, but it also brings the risk of fuel coking

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