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US 5,497,620 AGranted
Method of filtering particles from a flue gas, a flue gas filter means and a vehicle
OwnerPer Stobbeinventor
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OwnerPer Stobbeinventor
Estimating the term…
In filtering particles such as soot from a flue gas a porous filter body of a particulate material bonded together in the body is employed. The material is a metal or metal-like material having a thermal conductivity in excess of 10 W/mK, and the porous filter body has a porosity of 50-90% and a maximum pore size of 10-40 um. The porous filter body also has a thermal conductivity in excess of 10 W/mK. In accordance with the method, the flue gas is conducted through the porous filter body so as to accumulate the particles in the porous filter body. The particles accumulated in the porous filter body are burned off, whereby heat is generated locally. The heat generated locally by the burning-off of the particles is conducted throughout the porous filter body so that the temperature rise generated by the burning-off heat is reduced. Consequently, the porous filter body is not exposed to fatal, thermal stresses. A particular application of the porous filter body of the flue gas filter means is in vehicles comprising combustion engines generating soot, such as in diesel engines.
A method for preparing a porous filter body comprising:
A means for filtering particles from a flue gas, comprising a porous filter body of particulate SiC with a particle size in the range of 75-170 .mu.m bonded together in said porous filter body, said porous filter body having a porosity of 30-90%, a maximum pore size of 10-100 .mu.m, and a thermal conductivity in excess of 5 W/mK.
A means for filtering particles from a flue gas comprising a porous filter body prepared form a particulate material having a thermal conductivity in excess of 10 W/mK and a particle size in the range of 45-170 .mu.m, bonded together in said porous filter body in a sintering process, said porous filter body having a porosity of 30-90% and a maximum pore size of 10-100 .mu.m, and said porous filter body having a thermal conductivity in excess of 5 W/mK.
A vehicle comprising a diesel engine generating flue gas, which is exhausted from said diesel engine through a flue gas filter means comprising a porous filter body prepared from a particulate material having a thermal conductivity in excess of 10 W/mK and a particle size in the range of 45-170 .mu.m, bonded together in said porous filter body in a sintering process, said porous filter body having a porosity of 30-90% and a maximum pore size of 10-100 .mu.m, and said porous filter body having a thermal conductivity in excess of 5 W/mK.
A method for preparing a porous filter body comprising:
Dependencies are inferred from the claim text.