HONEYCOMB FILTER

• Main Authors: MATSUO YUKI, SAKAMOTO MASAHIRO, GOTO SHIGEAKI, FURUMOTO KAZUKI
• Format: Patent
• Language: English; Japanese
• Published: 29.09.2023
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; LIME, MAGNESIA; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; REFRACTORIES; SEPARATION; SLAG; STEAM ENGINES; TRANSPORTING; TREATMENT OF NATURAL STONE; WEAPONS

To provide a honeycomb filter configured so that pressure loss is low in the early stage of an exhaust gas treatment and at the time when particulates accumulate.SOLUTION: A honeycomb filter comprises porous bulkheads 13 partitioning and forming a plurality of cells as passages of exhaust gas, and further comprises exhaust gas introduction cells whose inlet-side end parts are opened and whose outlet-side end parts are sealed, and exhaust gas exhaust cells 11 whose outlet-side end parts are opened and whose inlet-side end parts are sealed, where cross sectional shapes of passages of the exhaust gas introduction cells and of the exhaust gas exhaust cells are same, in spaces from the inlet sides to the outlet sides. The exhaust gas introduction cells are arranged adjacently to the circumferences of the exhaust gas exhaust cells. The exhaust gas introduction cells are constituted of a first exhaust gas introduction cell 12 and a second exhaust gas introduction cell 14 which is larger in cross sectional areas of the passage than the first exhaust gas introduction cell. Cross sectional areas of the passages of the exhaust gas exhaust cells are equal to or larger than cross sectional areas of the passages of the second exhaust gas introduction cell. A slit part 19 is formed in the bulkhead partitioning the first exhaust gas introduction cell and the second exhaust gas introduction cell.SELECTED DRAWING: Figure 2C 【課題】排ガス処理の初期及びパティキュレート堆積時においても圧力損失が低いハニカムフィルタの提供。【解決手段】排ガスの流路となる複数のセルを区画形成する多孔質隔壁１３を備え、入口側端部が開口され出口側端部が目封止された排ガス導入セルと、出口側端部が開口され入口側端部が目封止された排ガス排出セル１１を備えてなり、排ガス導入セル及び排ガス排出セルの流路断面形状は入口側から出口側まで同じであるハニカムフィルタであって、排ガス排出セルの周囲に排ガス導入セルが隣接し、排ガス導入セルは、第１排ガス導入セル１２と、流路断面積が第１排ガス導入セルより大きい第２排ガス導入セル１４からなり、排ガス排出セルの流路断面積は、第２排ガス導入セルの流路断面積と同じであるかそれよりも大きく、一部の第１排ガス導入セルと第２排ガス導入セルを隔てる隔壁にはスリット部１９が形成されていることを特徴とする、ハニカムフィルタ。【選択図】図２Ｃ