2 Feng Zhiming Department of Organic Medicine, Hunan Medical College, Changsha 410006, China Gao Shaomu Longjiang County Bureau of Hydroelectric Power, Zhuojiang County, Hunan Province 419100 Abstract Hydrogenerator water cooling system adopts organic acid cleaning technology, which is safe, descaling thoroughly, and generated. Good pre-film layer and other advantages, its operation is easy to control, no environmental pollution. Main words Hydrogenerator Cooling System Organic Acid Cleaning 1 Overview The cooling water of turbine generators is mainly untreated rivers and rivers direct water, mud and sand dirt, bacteria and algae, high dissolved oxygen and carbon oxide content, strong corrosion . Carbon steel pipes and gate valves in the cooling system are vulnerable to corrosion. The deposition of metal sludge reduces the heat exchange rate of the cooling pipes, seriously affecting the cooling effect, and often making the turbine units unable to operate continuously at full load during peak periods of electricity usage. . The use of wire brush motor tools, etc. Although descaling, but due to the structure asked, such as pipe bends and coils, not only the effect of low scale removal, labor intensity and long time, and the residual dirt in the metal pipe can form an occlusion The local concentration zone continues to corrode the pipe, accelerating the deposition of scale. It is often repaired every year to remove scale, and the scale in the cooling pipes is continuously increasing, and the cooling effect is continuously declining. The biggest drawback of the mechanical cleaning method is that it easily damages the inner wall of the metal pipe, crevice corrosion and point corrosion occur at the scratches, and it is easy to damage the metal pipe and reduce the service life. Chemical cleaning is used for the cleaning of hydro-generators. It has the advantages of short cleaning time, high descaling efficiency, low labor intensity, and simple process. It completely solves the structural problems that cannot be solved by manual and mechanical methods, and can overcome artificial brushing maneuvers. Tools and high-pressure water jets cause scratches on the inner wall of the pipe, and the surface is not smooth and the cleaning is not complete but accelerating corrosion and scale deposition and other deficiencies, can save energy and water, reduce consumption, extend equipment life, improve production efficiency. Due to the complex material of the turbine generator cooling system. The use of inorganic acid cleaning, although the high efficiency and low cost of descaling, but inorganic acid corrosion is relatively strong, high technical operation requirements, the control of cleaning the end point is difficult and cleaning waste treatment is more complex. If organic acid is used for cleaning, it has the advantages of safety, high efficiency, thorough descaling, easy operation control and no environmental pollution. 2 Cleaning process Main steps Bacterial stripping water Rinsing water Rinsing prefilming Water washing. Bactericidal stripping Close the inlet and tail water tube gate valves, connect acid-resistant chestnut acid tanks and turbine generator cooling systems, and establish a temporary circulation system. Add 0020.051227 bactericidal algaecide and 0.05,0 osmotic agent, start circulating pump cycle cleaning 0.3 to kill the sterilized algae and strip the biological slime. Water flush replaces the sterilized water with cooling water and flush it with the production water, until the effluent is clear and transparent without floating foreign matter. Pickling compound metal corrosion inhibitor, temperature 2025, flow rate 15 to determine the acid concentration in the system, every 3, determine the concentration of Cu2+Fe2+ and Fe3+ in the system, and hang the scaled carbon steel tube and brass tube as the monitoring tube in the system, Monitor system cleaning. According to the descaling reaction, organic acid cleaning agent can be added. If 63+0.05, 2503 or 3!12 should be added. If 0+2, thiourea should be added for analysis, etc. to avoid copper plating. When the concentration of total iron in the system and the concentration of 2+, the concentration of 2+ tends to be stable. About 30, you can end the cleaning. 2.4 After the water is washed and pickled, to the top of the acid, flush with the production of direct current, flush to the value of the outlet water value of 56 can be ended adjustment of the leveling product, the mouth, add 50, a few 100 metal pre-film, circulation 81 !121 To pass the passivation solution to the monitor tube with a good prefilm. 2.6 Water flush After the passivation solution has been drained, flush with production water to the inlet and outlet water. The values ​​are similar. Remove the temporary circulatory system and resume production. 3 Concluding remarks The above process is used to clean the 8800疋 hydroelectric generator of a hydropower station. The inner surface of the carbon steel pipe and brass pipe is smooth and clean, the dirt is basically removed and a good pre-film layer is generated. After cleaning, the unit is in good condition, all parameters basically meet the expected requirements, and the customer is satisfied. wash. 2.5 Pre-film treatment with sodium hydroxide superior grade or analytical grade and sodium phosphate hydropower become a pillar industry of Ganzhou City Hunan Province Zhangzhou City rich in water resources, hydropower can develop 1,385,8001 Jia, which belongs to the local development of small and medium-sized hydropower 74.08 million kW. There are more than 610 hydrothermal power station plants in the city, with a total installed capacity of 370,900 kW, an annual power generation of 600 million kW, and an annual power supply revenue of more than 500 million yuan, and the net value of local fixed assets is 14.96. 100 million yuan. At present, there are 231 towns and townships that are powered by local power in 255 townships in the city, accounting for 90.59; in 1999, the city’s local power generation and power supply reached 730 million yuan. In 1991, Luzhou City set up a cross-city local hydropower regional power grid on the basis of the county-level power grid. After nearly 10 years of construction, the local power grid has built 01 substations, seven 351 substations and a total capacity of 0.4420 million. Addition of 01 transmission line 590, 351 line 12300 line 9630, formed a network linking Yizhang Yongxing Yucheng Guiyang Linwu Suxian Beihu and other counties and Lanshan Qiyang six counties and two cities. The installed capacity of the network has an installed capacity of approximately 300,000 years and exceeds 100 million kW. h. At the same time, it achieved two 90-channel interconnections with the Guangdong Provincial Grid. According to the relevant arrangements of the State Council, Zhangzhou City completed the transformation plan of local rural power grids in September 1998 and began to transform local rural power grids. So far, the transformation of local power rural power grids has resulted in nearly 300 million yuan of state investment and has used rural power grids. The transformation fund is 85.50 million yuan. The two counties of Linwu in Rucheng City have completed the transformation of rural power grids. The construction and operation of local power grids have achieved significant social and economic benefits. It promoted the construction of power grids and power supply in various electrified counties; it eased the tension in the demand for electricity; it broke the monopoly of the power market and realized the goal of local power being first used for local economic construction; local power has become The main financial resources of cities and counties, local power companies have become the most dynamic in the city what makes most electric power tools "different" from one another depends on how the physical energy is used, or its application. The process of making physical energy with electrical energy is very similar and where most performance issues occur. for most power tools, and happens to be where most maintenance is required Power Tool Carbon Brush,Black Carbon Brush,Bosch Carbon Brush,Dewalt Carbon Brush Haimen Hailing Carbon Industry Co., Ltd. , http://www.carbonbrush-hl.com
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