Open AccessInvestigating the dearating hotwell working regimes of the PT-60-130/13 steam turbine
Author(s) -
Artem Vodeniktov,
Н. Д. Чичирова
Publication year - 2021
Publication title -
izvestiâ vysših učebnyh zavedenij. problemy ènergetiki
Language(s) - English
Resource type - Journals
eISSN - 2658-5456
pISSN - 1998-9903
DOI - 10.30724/1998-9903-2020-22-6-155-163
Subject(s) - boiler feedwater , feedwater heater , condenser (optics) , deaerator , thermal power station , thermal , boiler (water heating) , turbine , oxygen , limiting oxygen concentration , nuclear engineering , steam turbine , environmental science , volumetric flow rate , materials science , chemistry , surface condenser , waste management , thermodynamics , inlet , engineering , superheated steam , mechanical engineering , physics , light source , optics , organic chemistry
THE PURPOSE. To consider the problems of the increasing dissolved oxygen concentration in feedwater, especially after the condensate pumps. To estimate the opportunity of the vacuum thermic deaeration intensification inside the PT-60-130/13 LMZ steam turbine condenser to reduce the feedwater system rate of corrosion. Perform a thermal test of the external deaerating hotwell, which provides reducing dissolved oxygen concentration by the hot drains and recirculating feedwater. To evaluate the march of the dissolved oxygen concentration in feedwater after the inclusion of the deaerating hotwell. METHODS. The thermal test of the external deaerating hotwell was chosen for evaluating water deaeration. RESULTS. In this paper, the results of the thermal tests are given. The relation of the dissolved oxygen concentration from heating fluid flow is also presented. CONCLUSION. The use of the external deaerating hotwell allows achieving dissolved oxygen concentration below the norms established by the сode of operation for electrical power plants and grids to ensure the maintenance of an acceptable water-chemical regime of the feedwater. During the tests, the dissolved oxygen concentration decreased by 70% and reached a value of 8 mcg/dm3. The deaerating hotwell of the considered type can be recommended for the operation, especially during start-up modes and modes with the low thermal load on the condenser cooling surface.