Blast furnace gas cleaning plant for pressure high furnaces

摘要

1503888 Throat gas cleaning plant GOTTFRIED BISCHOFF BAU KOMPL GASREINIGUNGS-UND WASSERRUCKKUHLANLAGEN KG 21 May 1976 [24 May 1975 (2)] 21239/76 Heading B1R A gas cleaning plant similar to that described in Specification 1446524 has a control arrangement wherein the crude gas pipe 3 is divided into (a) a main channel 12 containing a differential pressure annular gap washer 6 and expansion turbine assembly 7 with a quick-acting stop valve 9, and (b) a by-pass channel 13 containing an annular gap washer 14 as a pressure control valve and quickacting stop valve 15, wherein washer 14 and turbine assembly 7 are included as adjustment units in the control circuits for regulating gas pressure at furnace throat 2 and wherein valve 9 is arranged to close when the valve 15 opens and vice versa. The turbine assembly 7 comprises a control valve 18 which is controlled via 25 and 26 in response to alterations in throat gas pressure detected in adjustment unit 11. In a second embodiment (Fig. 2. not shown), the vanes 19 of the turbine itself are adjusted and the pressure control valve in the bypass channel 13 comprises split-path flap valves 14. In a third embodiment (Fig. 3, not shown), the pressure in 12 is controlled by adjustable vanes 32 in a distributor 31.