Energy saving and emission reduction method and system for engine tail gas treatment

Abstract

The invention relates to an energy saving and emission reduction method and system for engine tail gas treatment. The method is characterized in that a part of tail gas of an engine is recycled and mixed with an atomized reaction liquid, and enters into the engine for combustion, and the reaction liquid adopts water or a mixed liquid of water and an additive. According to the method and the system, the tail gas is recycled and mixed with the reaction liquid and performs backdraft utilization, so that fuel can be saved, and automobile power is improved; the tail gas emission is superior to standard Euro V; secondary pollution caused due to addition of chemicals in the prior art is avoided, an oil way of the engine cannot be plugged, and the maintaining and using costs are reduced; the problem of engine damage caused by waste gas backdraft in the prior art is avoided, the engine efficiency is further improved, and the engine performance is improved; the system can be used both in the production process of the engine and in the improvement of the engine, the cost is lower, and safety of a motor vehicle using the engine is not influenced; and the system doesn't use vulnerable parts, and is good in durability, not prone to be damaged, lower in using and maintaining costs and suitable for fuel oil engines or gas engines.

Description

technical field [0001] The invention relates to an energy-saving and environment-friendly method for automobiles and its accessory parts, in particular to an energy-saving and emission-reducing method and system for engine tail gas treatment. Background technique [0002] The engine is an indispensable power equipment, which is used in motor vehicles, general machinery, etc., and plays a vital role in industrial production and people's life. With the wide application of engines, especially for motor vehicles, the output and inventory of the engines continue to increase, and the environmental pollution caused by the exhaust emissions of the engines has also been paid more and more attention. [0003] Engine exhaust is the exhaust gas produced and discharged after the engine does work. It contains harmful substances such as CO (carbon monoxide), HC (hydrocarbons) and NOx (nitrogen oxides). The remaining combustible gas affects the overall efficiency of the engine and wastes e...

AI Technical Summary

Problems solved by technology

[0003] Engine exhaust is the exhaust gas produced and discharged after the engine does work. It contains harmful substances such as CO (carbon monoxide), HC (hydrocarbons) and NOx (nitrogen oxides). Remaining combustible gas, affecting the overall efficiency of the engine, wasting energy

[0004] In the existing technology, exhaust gas treatment technologies include "three-way catalysis", activated carbon adsorption and other methods, but the durability is limited, the replacement cost is high, and it cannot guarantee that the vehicle's exhaust gas will meet the standard emission under random use.

In addition, the existing tail gas treatment technology needs to add other chemicals, which is easy to cause secondary pollution

For example, the use of emulsified fuel oil can also reduce the emission of exhaust pollutants, but in practical applications, due to the high temperature and the residual heat after the engine is turned off, the co-solvent (surfactant and other additives) in the fuel near the engine oil pipe will crystallize and block fuel injector

After a long period of use, the emulsified fuel will be stratified and deteriorated, and even deposits and dirt will be generated in the oil circuit (fuel tank, filter, fuel injector) to block the oil circuit, resulting in difficulty in starting the engine, unstable work and stalling, and motor vehicles Poor acceleration, or complete "dead fire"

[0005] In order to solve the above problems, there is a technical solution to recycle part of the exhaust gas into the engine for re-combustion. Since there are some non-flammable gases in the exhaust gas, they will accumulate after many cycles, which will eventually affect the combustion in the combustion chamber of the engine. Although in some There are certain applications on the engine of the vehicle, but the effect of energy saving and emission reduction is not ideal. It not only affects the efficiency of the engine, but also reduces the power of the engine itself, and ultimately does not have the expected effect on environmental protection.

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