Recently, the VVER-1000 nuclear steam turbine independently developed by Harbin Electric Group Harbin Steam Turbine Works Co., Ltd. (abbreviated as Harbin Steam Turbine) completed the performance appraisal test of Unit 3 of Tianwan Nuclear Power Phase II Project. Under the condition that the reactor power is 3012 MW per hour, the output of the unit reaches 1136 MW, which is much higher than the Russian-made unit of the Tianwan Phase I project, exceeding the guaranteed value of 10 MW. The successful commissioning of the unit marks that the Harbin Steam Turbine has completed the transformation from introduction, conversion, absorption to full localization in the technology of millions of nuclear power turbines, to the independent innovation and leading nuclear power field, and also marked the Harbin Electric Power Turbine nuclear power technology has thus become the world's first phalanx.
Along the way, Unit 3 of the Tianwan Nuclear Power Phase II project left a series of flash trails: on October 5, 2017, the nuclear steam was successfully transferred; on October 6, 2017, one key was launched successfully; 2017 12 On the 30th of the month, the first time the grid was successfully connected; on February 15, 2018, the 100-hour full-power continuous operation assessment was successful. As the first self-designed and manufactured million-level nuclear power unit of Harbin Electric Turbine, Unit 3 of Tianwan Nuclear Power Phase II Project realized four “one-successful†“grand slam†records, unprecedented in domestic history. The project adopts the Chinese design planning concept in power station planning, project management and engineering construction. For the first time, the nuclear power project construction project independently completed by the Chinese owner, the Chinese power design institute and the Chinese host manufacturer has been realized, which has accumulated rich experience for China to enter the international market. Engineering experience.
It is understood that from the manufacture of the first Qinshan Phase II 650 MW nuclear power turbine in the last century, to the design and manufacture of the world's first third-generation AP1000 nuclear power unit - the three-door project, and now the Tianwan Phase II project, Harbin Steam turbines from scratch, from small to large, from the initial production of each department must learn from foreign technology, and now complete a comprehensive autonomous design, Harbin steam turbine development in the field of nuclear power turbines has become a microcosm of China's nuclear power development. According to the relevant person in charge of Harbin Steam Turbine, Harbin Steam Turbine started the research project of Tianwan Phase II project in 2012. After several data analysis, theoretical verification and modification, it has completed a total of 230,000 words of design report in two years, which means that the VVER-1000 nuclear power technology independently developed by Harbin Steam Turbine has been successfully developed. The design includes 32 sub-reports covering 11 major aspects of nuclear steam turbine overall design, high and low voltage module design, pneumatic and blade design.
Part of the VVER-1000 nuclear steam turbine technology is the first in China, achieving a new breakthrough in the development of nuclear power conventional island technology in China. For the first time, the nuclear island suitable for the VVER reactor type was seamlessly connected with the control system of the conventional island. The one-button start-up system of the Tianwan Nuclear Power Project was successfully started once; the first implementation was applicable to the VVER reactor type, with complete autonomy. The development of the first half-speed nuclear power steam turbine of intellectual property rights has filled the technical gap in the three-dimensional layout design of the power station system of domestic host manufacturers, marking that Harbin Steam Turbine has already possessed the capability of “Made in China†in the field of millions of nuclear power turbines. For the first time, the three-dimensional layout calculation of TG equipment and auxiliary systems was independently completed by the domestic steam turbine manufacturer, becoming the first steam turbine manufacturing enterprise in China to independently design and arrange the conventional island system; the first realization was in the millions of nuclear power turbines. The self-designed elastic pedestal mode breaks the convention that the elastic base relies on foreign technology.
According to reports, at present, Harbin Electric Turbine has the "Hualong No.1", optimized AP1000, improved VVER-1000, CAP1400, CANDU and other high-power nuclear steam turbine technology, as well as ACP100 nuclear power small machine, low temperature heating reactor nuclear power small machine technology And is developing a variety of nuclear power types such as CAP1700, high temperature gas cooled reactor, offshore floating power plant nuclear power small machine. "Big Soldiers" will go hand in hand and will continue to expand overseas markets and write a new chapter in China's nuclear power turbines from "bringing in" to "going out."
mainly used for earthwork and asphalt applications. New construction and repair work for medium and small scale construction projects, on parking lots, sidewalks, cycle paths, playing fields and sports grounds as well as rolling of joints in road construction.
6~10t large vibratory roller with relatively high pressure and solid capacity should be used for national trunk roads and special roads for automobiles.
For the highway below grade 3, or not often compaction work, it is best to equip with about 2t mobile flexible vibration roller.
2. For the cement concrete pavement, the series vibration roller driven by tire can be used;
3. For asphalt concrete pavement, full-drive vibratory roller should be selected;
4. For the bottom layer of high-grade road subgrade, it is better to choose tire roller or tire driving vibration roller for compaction to obtain uniform compaction;
5. When repairing the road surface, the static action roller can be used.
Iv. Selection of pressed materials according to the type:
1. For rock filling compaction, large tonnage roller should be selected to make large block displacement;
2 for clay compaction, it is best to use convex block ramming roller;
3. For the compaction of the mixture, it is better to choose vibratory roller, so as to mix the size of the particles evenly;
4. Heavy vibratory roller should be used for slow rolling for deep compaction, while static action roller should be used for shallow compaction.
Road Rollers,Vibrating Road Roller,Mini Road Roller,Drum Road Roller
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