环保部分说明.doc

1 Design basis 设计依据 --- technical specification requirement 技术规范书 --- Original documents provided by owner 业主提供的原始文件和资料 2 Flue gas pollution treatment and pollutant emission 烟气污染治理及污染物排放 2.1 Coal analysis 煤质分析 Coal analysis for this project is as follows（Table 2.1-1）： 本工程燃煤煤质分析如下（表2.1-1）：Particular Unit Design Quality Range Minimum Maximum Moisture % 35 25 42 Ash % 5 3.3 6 Carbon % 68.2 60 80 Hydrogen % 5.7 3 7.4 Sulphur % 1.8 0.13 2.2 Nitrogen % 1.13 0.54 1.5 Oxygen % 23.17 12 30 2.2 Flue gas pollution treatment 烟气污染治理措施 Flue gas from boiler is emitted by one stack with preliminary height of m; Double pass four field ESP with dust removal efficiency of more than 99.7% is selected in this project, Particulate emission maintains within 150 mg/Nm3 with all fields in service, at boiler output corresponding to BMCR; Low-nitrogen combustion measure on the boiler to reduce the NOX generation will be adopted. NOx content will be less than 850 mg/Nm3.Space for FGD will be reserved in the layout. Adopt seawater flue gas desulfuration and SO2 content will be less than 750 mg/Nm3. 锅炉产生的烟气经一座暂定m高的烟囱排放，选用除尘效率为99.7%的（），保证在额定工况下，除尘器正常工作时烟尘排放浓度不高于0 mg/Nm3；锅炉采用低氮燃烧措施控制NOX的产生，FGD Specific Description 烟气脱硫技术说明 SO2 concentration at stack inlet SO2排放浓度 Clean flue gas SO2 concentration at stack inlet not more than 750 mg/Nm3(@6%O2). One absorber will treating with flue gas flow rate of 100 % of BMCR. 清洁烟气中SO2含量低于750 mg/Nm3(@6%O2)。每个吸收塔的设计处理能力满足100% BMCR下的要求。 （2）Number of units 系统数量 There will be one FGD system for one boiler unit. Flue gas line, seawater line and absorber shall be installed for the FGD system. 本脱硫系统是每台锅炉一套烟气系统，整个脱硫系统共用一套海水系统。 （3） Flue gas line 烟气系统 The flue gas line equipment, as following: No Booster fan or GGH will be designed for flue gas line, the pressure drop of FGD should be overcome by boiler ID fans, FGD Clean flue gas temperature will be 30℃～45℃. 烟气系统的设备如下： 不设增压风机、GGH，脱硫系统的压降由锅炉引风机补充，处理后的烟气温度为30℃～45℃. （4） Absorber 吸收塔 One absorber for