METHOD FOR COATING WALL FLOW TYPE FILTER

摘要

PURPOSE:To allow a catalyst slurry to flow in a wall flow type filter from the bottom and to simply support the catalyst when the filter is coated with the slurry by connecting a slurry storage tank to a filter vessel with a communicating pipe and positioning the surface of the slurry in the storage tank above the top of the filter. CONSTITUTION:When a wall flow type filter 1 is coated with a catalyst slurry, the bottom of a filter vessel 3 contg. the filter 1 is connected to a slurry storage tank 6 with a communicating pipe 5 and the surface of the slurry in the tank 6 is positioned above the top of the filter 1. By the difference in head, the slurry is allowed to flow in the filter 1 from the bottom to coat the inner wall of each cell with a prescribed amt. of the catalyst. The flow of the slurry is regulated with a cock 4. The filter 1 has been covered with rubber 2 for hermetical sealing so as to prevent the slurry from entering the filter 1 from the side wall.