- DPF Substrates
Cleaning methods
As the running time and mileage of the DPF particle trap accumulate and increase,
a large number of particles accumulate and block the DPF, causing an increase in exhaust back pressure and deteriorating engine power and economic performance. Therefore, DPF must remove attached particles in time, which is the regeneration of DPF. DPF regeneration is divided into: passive regeneration and active regeneration.
Passive regeneration:
Passive regeneration generally refers to coating catalysts on the surface of DOC and DPF carriers to reduce the oxidation reaction temperature of the particles. The principle is that when the exhaust temperature is 250-400°C, monoxide and oxygen are oxidized into two in the DOC. Oxidizing gas, nitrogen dioxide and carbon particles
Active regeneration:
Converted to CO2 in the DPF, so that the carbon particles captured by the DPF are burned into CO2 at a lower temperature.Since the diesel engine is under low load in many actual working conditions, the exhaust temperature is very low, and passive regeneration is subject to certain limitations.
In actual operating conditions, the exhaust temperature cannot reach the passive regeneration conditions (exhaust temperature 250- 400°C), spraying is required.
The injection fuel undergoes an oxidation reaction in DOC.
raising the exhaust temperature to above 550°C, causing the captured carbon particles to burn into carbon dioxide.
Therefore, active regeneration has become a necessary post-processing technology for the National VI stage.
When the DPF high pressure difference fault is activated, active regeneration is disabled and cannot be performed. It is necessary to go to the disposal to perform the dust cleaning process. The DPF carrier cleaning detection system can be used for DPF carrier blockage cleaning processing.
which meets the technical requirements of carrier design and has a short regeneration time, energy saving, environmental protection, and good effect. It is a commonly used regeneration method for DPF carrier cleaning at home and abroad.
The DPF cleaning equipment regenerates the DPF carrier at a high temperature of 600°C, burns soot and other combustibles. degrades the carbon deposits in the carrier, and then cleans the pores of the degraded carbon ash through blast blowing and multiple pressurized purges to remove the carrier.
Internal carbon ash, which achieves the regeneration effect of clearing blockages. Finally, it is determined whether the carrier reaches the cleaning standard by detecting the back pressure difference, probe test, and weighing comparison.
