| 摘要 |
<p>1522993 Screw-type reactor BAYER AG I Sept 1975 [4 Sept 1974] 9174/78 Divided out of 1522992 Heading B1X A screw machine suitable for the continuous hydrolytic degradation of waste plastics e.g. polyesters, polycarbonates, polyamides and polyurethanes comprises a temperable housing 7 provided with heating means (9) and cooling means (8), a feed hopper (1). For example for the waste plastics material, an air-vent (2) located before hopper (1) relative to the flour direction through the machine, a screw-shaft comprising a first screw-threaded section. (4) having a pitch of at least 90 mm extending in the housing beyond hopper (1) and a second screw-threaded section (5) having a pitch of at most 70 mm adjoining the first section (4), the remaining part of screw shaft (6) being fitted with kneading discs; a water inlet (3) opening into the second screwthreaded section (5), a nozzle (10) attached to the housing at the outlet end of the machine, the nozzle being provided with a pressure and level measuring and regulating system (14) and (12), an inlet for gas-liquid mixture, an outlet (13) for gas and an outlet (11) for liquid, which preferably opens into a cyclone (15) provided with a cooling system (16) from which the gas and liquid phases can be removed at (18) and (17) respectively. The screw-machine preferably comprises interengaging screw shafts rotating in the same direction.</p> |
