ENGINE AFTERTREATMENT DEVICE USING LIQUID

摘要

PROBLEM TO BE SOLVED: To achieve miniaturization suitable for a vehicle engine and a high absorption ratio as well as a low pressure loss while curbing an increase in a manufacturing cost by making a NOx component efficiently contact with absorption liquid in an aftertreatment device which absorbs and removes the NOx component in exhaust from an engine through gas-liquid contact.SOLUTION: In an engine aftertreatment device 1, a NOx absorption section 2 which has many gas-liquid contact passages 21 arranged in a vertical direction is installed in the middle of an exhaust pipe EX of an engine E and an injector 31 of a liquid supply device 3 is arranged above the gas-liquid contact passages 21 with an exhaust introduction section 41 in between. Because exhaust is evenly introduced into the exhaust introduction section 41 through an opening section 43 provided on a partition wall 42 between the exhaust introduction section 41 and the exhaust passage EX without disturbing supply of absorption liquid, the absorption liquid is spread throughout the gas-liquid contact passages 21 and thereby enhancing NOx absorption efficiency.