PLANT FOR VACUUM HEAT TREATMENT OF MATERIALS Russian patent published in 1998 - IPC

FIELD: plants for vacuum heat treatment of metals, vacuum drying of wood, vacuum drying and sublimation of agricultural products. SUBSTANCE: plant has airtight chamber with heat-carrier circulation system in the form of headers; device for formation of heat carrier in the form of gas-turbine engine connected with its exhaust nozzle to header through unit of gas mixing; vacuum system in the form of at least two ejectors connected with gas turbine engine and airtight chamber. Exhaust gas mixing unit is made in the form of ejector mixer with connected means of air suction and injection of cooling water. Vacuum system is made in the form of additional ejector-condenser installed before ejectors and connected unit of steam utilization, its cooling and circulation. Airtight chamber is made in the form of load-bearing framework and horizontal load-bearing partitions separating the framework into sections and flexible shell connected with framework and made convex towards working space. Framework consists of hollow structures, for instance, box-shaped ones and connected with headers. Framework structural components are perforated. EFFECT: higher efficiency. 3 cl, 5 dwg