600MW亚临界汽包炉炉水平衡磷酸盐处理工艺试验研究  

Experimental study on boiler water equilibrium phosphate treatment technology of a 600 MW sub-critical boiler unit

作　　者：星成霞[1] 孙璐[2] 王应高[1] 李永立[1] 金绪良[1] 

机构地区：[1]华北电力科学研究院有限责任公司.北京100045 [2]沈阳惠天热电股份有限公司,辽宁沈阳110014

出　　处：《工业水处理》2014年第5期17-20,共4页Industrial Water Treatment

摘　　要：为了降低某电厂600MW亚临界汽包炉饱和蒸汽钠含量，以预防汽轮机积盐，将该锅炉炉水处理方式由常规磷酸盐处理方式（Pr）转换为平衡磷酸盐处理方式（Err）。试验结果表明：该锅炉炉水Err工况磷酸盐平衡点为0．45-0．55mg/L，控制炉水电导率小于10μS/cm、用NaOH调整炉水pH9．30-9．50、炉水钠小于1000μg/L、饱和蒸汽携带系数（以钠计）小于0．1％，可保证该机组额定工况运行时饱和蒸汽钠小于3．0x1O^-6g／ks，达到水汽质量标准要求的期望控制值．In order to reduce the content of sodium ions in the saturated steam of a 600 MW sub-critical boiler unit for preventing salt deposition on steam turbine,the routine phosphate treatment method PT has been converted into equilibrium phosphate treatment method （EPT）. The experimental results show that the Phosphate Equilibrium Point of the boiler water EPT working condition is 0.45-0.55 mg/L, and the boiler water conductivity is controlled at less than 10 μS/cm. NaOH is used for adjusting the boiler water pH to 9.30-9.50,and the sodium in boiler water is less than 1 000 μg/L and the carryover coefficient of saturated steam（by sodium） is less than 0.1% ,so as to guarantee the saturated sodium in steam to be less than 3.0x10^-6 g/kg,while the rated working condition of the unit is running, reaching the expected controlled value reauired in the steam aualitv standard.

关 键 词：600MW亚临界汽包炉 蒸汽钠含量 平衡磷酸盐处理 磷酸盐平衡点浓度 

分 类 号：TK223.5[动力工程及工程热物理—动力机械及工程]