Air inlet and exhaust treatment system of low-emission internal combustion engine

Abstract

The invention discloses an air inlet and exhaust treatment system of a low-emission internal combustion engine, and relates to the technical field of internal combustion engines. The technical problem that tail gas of the internal combustion engine contains a large amount of harmful gas and soot particulate pollutants is solved. The system comprises an inert gas storage tank, an oxygen storage tank, an oxygen generator, a black carbon combustion device, a fuel tank and a mixer, wherein the inert gas storage tank, the oxygen storage tank and the oxygen generator are connected to the same gas supply pipe; the gas supply pipe is connected with a gas inlet pipe; the mixer is located on the gas supply pipe; the black carbon combustion device is connected with an exhaust pipe through a first tail gas pipe; a fifth control valve is arranged on the first tail gas pipe and connected with the mixer through a second tail gas pipe; the oxygen generator is connected with the black carbon combustion device through a first gas supplementing pipe; a sixth control valve is arranged on the first gas supplementing pipe; the fuel tank is connected with the black carbon combustion device through a fuel pipe; and a fuel pump and a seventh control valve are sequentially arranged on the fuel pipe from the fuel tank to the black carbon combustion device.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, more specifically, it relates to an air intake and exhaust gas treatment system and device of a low-emission internal combustion engine. Background technique [0002] As we all know, internal combustion engines that use diesel, gasoline and other petrochemical oils as fuel need to inhale air in the cylinder, and produce carbon dioxide, nitrogen oxides NOx, hydrocarbons HC, soot particles, carbon dioxide CO 2 , and substances such as water. At the same time, in the composition of air, oxygen O 2 Accounting for 21%, nitrogen N 2 Oxygen O 2 with nitrogen N 2 ratio is almost constant. It can be seen that the oxygen O that is helpful for combustion 2 The content ratio is always at a low level, and during the combustion process, because a large amount of N 2 The existence of diesel will cause the internal combustion engine that uses diesel as fuel to emit a large amount of ni...

AI Technical Summary

Problems solved by technology

Because DOC (Diesel Catalytic Oxidizer) uses rare and precious metals as catalysts, DPF (Soot Particulate Filter) uses ceramic filter carriers with complicated process and limited service life, and SCR needs to consume a large amount of NH 3 Urea solution, the cumulative use cost is relatively high. According to statistics, the purchase and maintenance cost of the exhaust after-treatment device of the internal combustion engine has accounted for more than 30% of the purchase and maintenance cost of the complete engine, or even higher, and because of failure or the end of service life will generate a large amount of Discarded post-processing devices need to be recycled and processed. In the long run, it is not conducive to the long-term and large-scale promotion and use of post-processing devices.

[0004] The main reason for the above problems is that the use of petrochemical oil, especially the intake air required for combustion is taken from the air, and the air contains a high proportion of nitrogen N 2 , As a result, the exhaust gas emitted by the internal combustion engine contains a large amount of harmful gases such as nitrogen oxides NOx and pollutants such as soot particles

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