CONVEYING AND LOCK SYSTEM
A conveying and lock system (10) for introducing a bulk material with exclusion of gas and for preventing gas exchange with a low pressure difference into a reactor(14) has a screw shaft (44) on which first windings (46) and second windings (48) are formed. Between the first and second windings (46, 48), a winding-free section (50) is formed, in which the conveyed bulk material is compacted. The compaction forms a bulk material plug which is very substantially gas-free and, during the bulk material transport, a bulk material plug is constantly formed in the conveying and lock system (10) by means of the screw shaft (44) and prevents gas exchange between the product entry and the product exit in the conveying and lock system (10).