DPF Honeycomb Ceramic for Cleaner Diesel Particulate Filter

DFP Ceramic honeycomb

Technical features of the company's honeycomb ceramic automobile exhaust carrier:

(1) large specific surface area: ensure the full contact of exhaust gas and catalyst.

(2) stable water absorption performance: to ensure that the catalyst firmly evenly coated on the surface of the carrier, at the same time because of the thick coating brings waste.

(3) warm-up: the engine is required after starting, the carrier temperature can achieve the target catalyst activity temperature in the shortest time.

(4) low exhaust resistance: the requirement of the carrier of the engine exhaust resistance is very small, to ensure that does not affect the performance of the engine.

(5) high strength: because the working environment of the carrier is on the bumpy car, so the carrier is required to have higher strength and not be damaged by external forces.

6 good assembly: the exhaust assembly of a part of the carrier, only a good appearance and accurate size to ensure that the assembly is perfect.Performance project property value thermal performance coefficient of thermal expansion (40-800 ºC) (x 10-6 / ºC) < 1.0 heat [J/(g.)] 0.84 softening temperature (1400 ºC) melting point (1455 ºC), the highest temperature (1350 ºC) physical properties of pore volume (cm3 / g) 0.2 show porosity (%) of 36 fine average aperture (um) 4 mechanical compression fracture strength

A particulate filter is installed in the exhaust pipe of the engine, and the filter material can be ceramic honeycomb carrier.The working principle is as follows: firstly, particulate matter is trapped by the filter, and then the particulate matter trapped in the filter is oxidized and burned to complete the regeneration of the trap.After collecting a certain number of particles, the backpressure of the filter will rise, the filtration efficiency will decline, and the economic and power performance of the diesel engine will deteriorate.Therefore,DPF must be regenerated under certain conditions, and the particles in DPF must be removed. DPF regeneration includes active regeneration and passive regeneration.

The disadvantage is that regeneration is difficult and the regeneration frequency is high. The thermal oxidation temperature of carbon particles is as high as 825 ~ 875K, while the exhaust temperature of diesel engine is 450 ~ 675K.Therefore, it is necessary to add a heat source (such as electric heating, microwave heating, etc.) or choose a highly active catalyst to reduce the oxidation temperature of carbon particles, so that the filtered carbon smoke particles are removed by oxidation and regeneration.But the regeneration process can produce high temperature above 2000 ºC, it is easy to ceramic carrier burning-out or local overheating and burning.

(I) active DPF regeneration

Active regeneration is the use of various external energy regeneration, including electric heating regeneration, microwave regeneration, fuel injection combustion regeneration.By increasing the temperature of the filter, the soot can be removed by combustion.Regeneration is independent of the heat carried by the exhaust and can be controlled manually, so active regeneration has a wide range of applications.However, the active regeneration system increases the energy consumption and its control component is large, so it is not the preferred regeneration technology.

(ii) DPF passive regeneration (CDPF)

Passive regeneration by catalytic regeneration technology, the use of the catalyst can reduce the particle activation reaction, make particles combustion temperature down to about 350 ºC, can make the particles in the larger operation condition of the diesel engine to regenerate.There are many catalytic additives for passive regeneration, such as Ce, Pt,Mn, Fe, Cu, etc.In recent years, as a kind of typical solution, adding cerium (Ce) in diesel additives, leading to combustion of particles containing Ce compounds, thus reducing the spontaneous combustion temperature of particles under 300 ºC, for the most part in diesel engine operating conditions, automatically renewable, Ce additive mass fraction in the range of 0. 002% ~ 0. 01%.However, there are some problems with this method. When the amount of additive is large, the oxide of metal Ce (other metal additives are the same) will remain in the particle filter and cause chronic blockage.And may produce harmful emissions to human body.

(3) continuous automatic regeneration filter (cr-dpf)

Installing DOC devices upstream of DPF to regenerate DPF with its products is also a passive regeneration technique.Pt catalysts used for oxidation of NO to NO2, produce NO2 for oxidation of carbon particles, if use sulphur quality score below 0. 015% of the fuel, CR - DPF device working temperature is lower than when using the CDPF 54 ~ 66 ºC.Generally, the effect of cr-dpf on fuel consumption is greater than that of CDPF due to the increased exhaust backpressure due to the DPF device.
SIZE:

SizeCPSIVolume(L)φ118*152.4100/2001.67φ118*254100/2002.78φ127*152.4100/2001.93φ127*180100/2002.3φ127*254100/2003.22φ144*152.4100/2002.49φ144*203100/2003.31φ144*254100/2004.44φ144*305100/2004.97φ190*152.4100/2004.32φ190*203100/2005.76φ190*305100/2008.65φ240*240100/20010.9φ240*305100/20013.8φ250*305100/20014.97φ267*254100/20014.22φ267*267100/20014.95φ267*305100/20017.07φ286*305100/20019.6φ286*355100/20022.8φ305*305100/20022.28φ330*381100/20032.59

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