GB759936A - Improvements in or relating to devices for removing solid matter from smoke - Google Patents

Abstract

759,936. Chimney smoke filters. KERSHAW, W. - Nov. 25, 1954 [Dec. 24, 1953], No. 35829/53. Class 25. [Also in Group XXVIII] A device for removing solid matter from smoke has a passage adapted to communicate at its entrance end with the smoke flue or the like of combustion apparatus the passage having an orifice obturated by a filter adapted to be moved rectilinearly relative to the said orifice whereby the filter forms a moveable partition across the said passage, and means for causing a flow of smoke from the flue through the passage and the filter, which is permeable to gases and vapours but which is adapted to remove solid matter from the smoke passing therethrough. In the smoke filtering device shown in Fig. 1 a fan 26 induces smoke in a chimney 1 to pass via pipe 2 and slag or steel wool filter 5 to a filtering chamber 9. Smoke enters this chamber at orifice 11 and leaves at orifice 24 being forced in its passage therethrough to pass through one run of a continuously moving canvas endless belt 12 and a perforated guide plate 15 the latter being so tensioned by springs 16 that it keeps the moving belt against the orifice 11. The belt is mounted on rollers 13, 14, the former being motor driven and the moving belt is kept clean by a brush 21 and scraper 22 dirt therefrom being deposited in a removable container 10. Smoke leaving the chamber 9 is either passed to the atmosphere through pipe 34, or to the chimney through pipe 35 or to a water washing device 29 through a pipe 28. In a modified form of filtering chamber, Fig. 2, the smoke from the slag or steel wool filter 5 is caused to pass through both rtms of an endless belt 43 and two spring-loaded guide plates 44<SP>1</SP>. The belt is cleaned by brush 45, scraper 46 and a water bath 44. A modified form of slag or steel wool filter is shown in Fig. 3. In this embodiment smoke is extracted from the chimney by a fan 47 and the slag or steel wool 52 is held in a perforate container 53. Smoke from the pipe 51 passes to a filtering chamber such as shown in Figs. 1 and 2 the fan 47 assisting the fan 26 in moving the smoke. The motor driving the fan 26 may be provided with adjustable speed control for varying the rate of flow of the smoke. Solid deposited matter is removed from the slag or steel wool container through a door 7 of the embodiment shown in Fig. 1 and a door 55 of that shown in Fig. 3 whilst the belt 12 is removed for renewal purposes through the bottom of the casing 9 when the container 10 is removed and the belt 43 is removed from its chamber for a similar purpose through a suitable door therein. The slag or steel wool 5, 52 is renewable through doors 4<SP>1</SP> and 54 respectively.