Process and Apparatus for Producing Steam or Vapour of any Desired Pressure from Liquids Heated under Pressure but not Boiling, and the Application of the Process for Concentration of the Liquids.

摘要

12,805. Steffen, C. July 16. Steam generation, methods of.-Relates to a process of generating steam and vapour under pressure whereby the liquid is heated under a pressure above that corresponding to its boiling-point at the desired working pressure, being withdrawn from a vessel at a temperature corresponding to the boiling-point at working pressure and returned thereto. The returning steam or vapour and liquid works a motor, which withdraws the liquid and forces it through the heater. Fig. 1 shows an arrangement of steam-generating plant. The vessel a is maintained at a working pressure and at a temperature corresponding to the boiling point at that pressure. Water is withdrawn by the centrifugal pump d and delivered to the vessel b, which is at the same temperature as a but under higher pressure. Thence the liquid passes through the heater e, and is returned through a loaded valve g to the vessel a, where steam is disengaged, and where it operates, as it enters, the turbine wheel f. A connection is provided at c between the vessels a and b, through which return circulation is effected during the starting of the apparatus. An external motor and pump may replace the motor wheel f and pump d, and both may be of the reciprocating type. Feedwater is supplied through a heater to the vessel b by the pump h.