英文培训教材-chapter 1 introduction of chemical in power plant.pptxVIP

Chemical Training Part 1 introduction of chemical in power plant;Main content;1 Introduction of steam water system;;2 Water in power plant ;2.1 Function and loss of water in power plant;Boiler：boiler blow down , Safety valve and super heater release, Soot blowing and fuel atomization. Turbine：continuous vent in turbine shaft seal ， Air extractor and deaerator vent. Pipeline system：Flange and valves leakages etc. All kinds of tank overflow and hot water evaporation. ;In order to maintain normal water steam cycle system, it needs “additional water. Makeup water is treated, after the removal of harmful impurities from the deaerator or condenser into the system at a supplement. Under normal circumstances, the supply of water condensing power plant does not exceed 2% to 4% of the rated boiler evaporation. ;2.2 Types of water in power plant;Condensate water：The exhaust steam passed though the condenser condense into water. Drain water： The steam condensate in all kinds of steam pipes and steam equipment , which is collected drain tank through by steam trap, at last flow into condensate system. Feed water: The water sent into boiler is called feed water. Feed water is consist of main condensate water, make up water and drain water . Boiler water： Flowing in the boiler body water evaporation system, referred to as boiler water Cooling water： Water as the cooling medium, mainly used to cool the turbine exhaust steam by passing condenser. ;2.3 Poor water quality hazards;2.3.1 Thermal equipment scaling; 2.3.2 Thermal equipment corrosion;2.3.3 Super heater and turbine salt accumulation;3 Scope of chemical in power plant;No.