Structure of post-treatment system for crane attached to guoliu
The Sixth National post-processing system is mainly composed of post-processing system, sensor and actuator.
- Author: crane manufacturer
- Source: Original
- Release time: 9:49:41, November 8, 2019
- News browsing popularity: second
The system consists of six parts: sensor, post-processing system.
In order to meet the national VI emission standard, Doc, DPF and ASC should be added to the national VI system. Therefore, a series of sensors, actuators and closed-loop control strategies should be added to the post-processing system to support the monitoring, control and normal operation of doc-dpf-scr.
The detailed explanation is as follows: explain the meaning of these processing systems respectively:
1. EGR: full name is exhaust gas recirculation (EGR). After combustion, a part of the exhaust gas is separated from the internal combustion engine and introduced into the intake side to make it burn again. The main purpose is to reduce the NOx in the exhaust gas and increase the fuel consumption rate when sharing part of the load.
2. Doc: oxidation catalytic converter, Doc technology is the oxidation catalytic technology of diesel engine exhaust after treatment. The oxidation catalytic converter (DOC) uses platinum (PT), palladium (PD) and other noble metals as catalysts, which mainly reduces the content of sof in micro material emissions, thus reducing PM emissions.
DPF and DPF are referred to as particulate traps.
3. SCR: selective catalytic reduction technology, which is commonly known as urea system, is the most frequently encountered in China's four and five models.
4. ASC: ammonia oxidation catalyst, which is used to eliminate excess or escaped NH3.
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