NDLI: Development of methods for the decrease in instability of recycling water of conjugated closed-circuit cooling system of HPP

Content Provider	Springer Nature Link
Author	Chichirov, A. A. Chichirova, N. D. Vlasov, S. M. Lyapin, A. I. Misbakhov, R. Sh. Silov, I. Yu. Murtazin, A. I.
Copyright Year	2016
Abstract	On Russian HPPs, conjugated closed-circuit cooling systems, where purge water is used as initial for water-treatment facilities, are widespread. For this reason, it is impossible to use general methods for the stabilization treatment of recycling water in order to prevent scale formation in the units of a system, namely, turbine condensers and cooling towers. In this paper, the methods for the decrease in the instability of recycling water using the methods of chemical engineering, such as stabilization and synchronization of flows and organization of recycles, are suggested. The results of an industrial experiment on the implementation of stabilization treatment of recycling water by the organization of recycle are given. The experiment was carried out on Kazan CHPP-3. The flow scheme involved the recycle of chemically purified water (CPW) for the heat network make-up to the closed-circuit cooling system. The experiment was carried out at three stages with the gradual change of the consumption of the recycle, namely, 0, 50, and 100 t/h. According to the results of experiments, the reliable decrease in the rate of the sedimentation was recorded on the units of the system, namely, turbine condenser and chimney-type cooling tower. This is caused by two reasons. Firstly, this is periodic excessive concentration of recycling water due to the nonstationary character of inlet and outlet flows. Secondly, this is seasonal (particularly, in the summer period) exceeding of the evaporation coefficient. As a result of stabilization and synchronization of flows and organization of recycles, the quality of clarified and chemically purified water for the heat network make-up increases and the corrosion of iron- and copper-containing structural materials decreases. A natural decrease in temperature drop on the operating turbine condensers is mentioned.
Starting Page	747
Ending Page	753
Page Count	7
File Format	PDF
ISSN	00406015
Journal	Thermal Engineering
Volume Number	63
Issue Number	10
e-ISSN	15556301
Language	English
Publisher	Pleiades Publishing
Publisher Date	2016-09-16
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	heat-power plant conjugated closed-circuit cooling systems turbine condenser sediments stabilization treatment of recycling water Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Nuclear Energy and Engineering

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