What are the treatment methods for diesel vehicle exhaust?

Diesel exhaust treatment methods include: diesel SCR exhaust aftertreatment, diesel exhaust treatment liquid, exhaust treatment device, etc.

The principle of SCR technology is to selectively reduce nitrogen oxides into nitrogen and water in an oxygen-enriched environment by using a reducing agent under the action of a catalyst. SCR system includes urea tank (containing diesel exhaust gas treatment liquid) and SCR catalytic reaction tank.

The operation process of SCR system is as follows: when nitrogen oxides are found in the exhaust pipe, the urea tank automatically sprays diesel tail gas treatment liquid, and the diesel tail gas treatment liquid and nitrogen oxides undergo redox reaction in the SCR catalytic reaction box to generate pollution-free nitrogen and water vapor. Tail gas treatment device is a device for purifying tail gas under the action of catalyst to reduce environmental pollution.

Extended data:

In recent years, with the development of automobile technology in China, emission upgrading has been an important issue. Some cities have taken the lead in implementing the national IV standard. Although most of the current emission upgrades are aimed at light gasoline vehicles, diesel vehicles are limited to special industries such as public transportation and postal services.

Yuchai, the first diesel engine in China, also adopted SCR as post-treatment technology, achieving national IV emission. Cummins, which sells many domestic IV engines in China, said that although they have mastered these two technologies, in their view, SCR technology is more suitable for the China market. In terms of technical route, domestic mainstream diesel engine manufacturers have basically reached a consensus that SCR will be the main technical direction for domestic diesel engine emissions to continue to upgrade in the future.

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