Prediction of channel deformations of rivers and canals

Power Technology and Engineering -     

Erection of central concrete-transport trestleway for Zeya hydroelectric station

Conclusions According to the experience gained in erecting the upstream concrete-transport trestleway during construction of the Zeya hydroelectric scheme, in order to reduce labor consumption, the demands for crane time, and the erection period, and to improve conditions for safety, it can be recommended where similar trestleways are being erected that: a) maximal subassembly of the units to be erected should be carried out at subassembly bases not more than 5 to 10 km distant; b) connection of the units being erected should be made with highstrength bolts tightened by calibrated dynamometric wrenches; c) the Zeya method of supporting the pylons should be applied; d) special two-jib units should be used for erecting the heaviest crane-runway girders. Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 9, pp. 9–11, September, 1977.     

Use of Sorbents of Hot-Contact Coal Carbonization in the Power Industry

The many years of experience in the use of sorbents of hot-contact coal carbonization in the power industry is used for substantiation of their prospects for solving problems of power and materials saving and improving the reliability and safety of operation of power equipment. Results of tests of sorbents in systems of water conditioning of thermal power plants, cleaning of return condensates, mazut- and oil-contaminated process wastewaters, makeup water in heat networks, and biosorption cleaning of sewerage are presented. The sorption methods of cleaning are shown to have many advantages, to save expensive ion-exchange resins and reagents, to decrease the cost of desalinated water, and to prolong the service of power equipment. Comparative data are presented for basic commercial kinds of activated carbon and HCCC sorbents (ABD). The technical characteristics of sorbents of hot-contact coal carbonization are shown to be at the level of commercial sorbents or be higher at a much lower cost (by a factor of 2.5 – 3). It is shown that the creation of several HCCC installations with an output of 25 – 30 thousand tons of sorbents a year at coal-fired power plants will solve many water-cleaning problems of the EÉS Rossii Co. (The United Power Systems of Russia) and make it a monopolistic producer of activated carbon in the Russian market.