Increasing the Operational Reliability and Efficiency of Boiler Plant Equipment of Thermal Power Stations by Improving the Quality of Measuring their Technological Parameters.
Abstract
DOI: https://doi.org/10.32820/2079-1747-2023-31-42-49
The present article examines the potential to enhance the operational reliability and safety
of domestic energy systems by focusing on the accurate measurement of key technological
parameters pertaining to the operation of boiler plants. Given the pivotal role of thermal power
stations in facilitating sustainable energy development, the article delves into their environmental
impact and emphasizes the imperative of mitigating emissions through the adoption of reliable
and energy-efficient measures. To enhance the precision of technological parameter
measurements in boiler plants, the utilization of high-temperature film thermocouples is
proposed. These thermocouples are commonly employed in high-temperature measurements
within the fields of rocketry, aviation technology, and metallurgy. In this context, their
application is suggested for the measurement of heat-transfer agent temperatures in the steam
boiler system, as well as for the temperature measurement of boiler water-wall tube surfaces. The
article identifies the unique attributes of measurement circuits utilizing high-temperature film
thermocouples, which contribute to the improved operational reliability and efficiency of boiler
plants within thermal power stations. It is acknowledged that due to the structural constraints
within the boiler plant system, it is not feasible to situate the connection point of compensating
wires in areas of relatively moderate temperatures. To address this limitation, a solution is
proposed wherein combined compensating wire thermo-electrodes are employed. Through
hardware adjustment, these thermo-electrodes exhibit grading characteristics that closely align
with the characteristics of film electrodes within the temperature ranges of observation. For
selected high-temperature thermocouples made of Au65Pd35 - Pt90Rh10 materials, standard
thermos-electrodes made of alumel and copele for the negative branch (Au65Pd35), and chromel
and alumel for the positive branch (Pt90Rh10) were used. In order to validate the proposed
technical solution, a series of experimental tests were conducted to evaluate the performance of
compensating combined thermo-electrodes within measurement circuits incorporating hightemperature film thermocouples. These experiments were specifically carried out at the TПП210А boiler located at Zmiiv Thermal Power Station. Research results can be used for boiler
plants of thermal power stations, as well as for steam generators of nuclear power stations.
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