ES390878A1 - Waste heat steam generating cycle - Google Patents

Abstract

Improvements in residual heat fluids water vapor generation systems of the type comprising heat exchangers and means for supplying residual heat gases thereto, the heat exchangers comprising fluid heating elements and steam superheating elements, characterized by that a plurality of high-pressure and high-temperature liquid receivers are used in series-parallel, decreasing the temperature and pressure in each receiver in each series; because hot working liquid is pumped at a pressure higher than its vaporization point to the liquid receiver, at the highest temperature in each series, from at least one of the heat exchangers in the residual heat generation system; because multiple stage steam turbines having a number of stages corresponding to the hot liquid receivers in each series are used, each turbine stage having a plurality of steam introduction nozzle by which a series of vaporization chamber is used snapshot corresponding to the liquid receivers, the hot liquid being introduced from the liquid receiver at the highest temperature to an instantaneous vaporization chamber where they vaporize instantaneously at successively lower temperatures and pressures; by which connection means provided with valves are used from the instant vaporization chamber, to a steam superheat heat exchanger in the residual heat section and then to the nozzle sets in the high pressure section of the steam turbine , because the nozzle sets are opened in sequence and in a cumulative way as the temperature and pressure of the steam in the instant vaporization chamber are reduced to maintain a practically uniform energy production in the turbine stage; because after reaching the predetermined lower temperature and pressure in the highest pressure receiver, the connection means to the high pressure instant vaporization chamber are cut off and liquid is pumped to a second instant vaporization chamber where it is instantaneously vaporized at progressively decreasing pressures until reaching a predetermined level; because said second instant vaporization chamber is connected through a second superheater changer in the residual heat section and from this to another set of sequential nozzle sets in the next section of the steam turbine, the nozzles being opened in sequence and cumulatively as the steam temperature and pressure are reduced, in the same way as in the high temperature section of the turbine; because serial liquid receivers and instantaneous vaporization stages connect to turbine stages with sequential nozzle sets, such as in the high temperature section of the turbine; Because after the liquid has been vaporized instantaneously at the lowest pressure predetermined for the system, the highest temperature liquid receiver in a second series is connected and the steam connections to the superheaters are cut off from the instantaneous vaporization chambers of the first series, repeating the cycles in the second series of liquid receivers and instantaneous vaporization chambers, and repeating the cycle through the first series with new liquid at high temperature after the second series has vaporized the liquid until it is reduced to the default temperature. (Machine-translation by Google Translate, not legally binding)