Task: Translation
Input (Czech): Zp sob spo  v  v ·prav  nap jec  vody vysokotlak²ch kotl  na v²robu p ry pro turb ny, zejm na v jej m   °en  a deionizaci a demineralizaci v iontom ni ov  ionexov  °ad , p°i em  zbytkov  Na.sup.+.n. ionty v demineralizovan  vod  se stopami NaON a Na.sub.2.n.SiO.sub.3.n. se nahrazuj  spolehliv  H.sup.+.n. ionty za vzniku H.sub.2.n.SiO.sub.3.n., kter  se d le alkalizuje t kav²m alkalick²m prost°edkem, s v²hodou amoniakem. Za° zen  je tvo°eno iontom ni ovou ionexovou °adou /1/ v °azen  K1 - A1 - K2 - A2 - K3, kde K3 je siln  kysel² koncov² katex /6/ s funk n mi skupinami SO.sub.3.n.H. Odkalov n  se prov d  tradi n m zp sobem, kdy ionogenn  SiO.sub.2.n., kter² se identifikuje laboratorn  za vzniku silikomolybdenov  mod°i, dos hne maxim ln  p° pustn  hranice pro vysokotlak  kotle.\
Output (English): The invented prevention method comprises treatment of feedwater of high-pressure boilers intended for production of steam for turbines. The feedwater treatment process comprises especially clarification, deionizing and demineralizing thereof within a ion-exchanger train, whereby residual Nae+ ions in the demineralized feedwater with traces of NaON and Nai2SiOi3 are reliably replaced by He+ ions under formation of Hi2SiOi3 that is further subjected to alkalization with a volatile alkali agent, preferably with ammonia. Apparatus for making the above described method comprises an ion-exchanger train /1/ with the following sequence K1 - Al - K2 - A2 - K3, wherein K3 is a strongly acid end cation exchanger /6/ having SOi3H functional groups. Desludging is carried out in a traditional way, wherein the ionogenic SiOi2, which is identified in a laboratory under formation of silicon-molybdenum blue, reaches an admissible limit acceptable for the high-pressure boilers.