山东中华发电有限公司菏泽发电厂(以下简称菏泽电厂)二期2x300MW亚临界燃煤 机组脱硫工程采用为石灰石一石膏湿法工艺，由山东三融环保工程有限公司承包建设，一 炉一塔脱硫装置，在燃用含硫量1f7%的脱硫设计煤种时，即FGD入口烟气中SO:含量为 3685mglNxn}，烟气量为115.1 x 104Nm}lh(标态、干基、6%02)，脱硫装置设计S02脱除 率不小于95%0 中国煤炭市场供应来源的不确定，菏泽电厂实际燃用的煤质含硫量与设计煤种存在一 定的偏差，实际烟气脱硫系统入口S02浓度常常超出脱硫装置的设计值，且随着最新大 气污染物排放标准的实施以及山东省火电厂大气污染物排放标准颁布，净烟气二氧化硫排 放浓度已无法满足最新环保标准的要求。故菏泽电厂拟对现有装置进行增容改造，进行二 期3号、4号机组脱硫装置的增容改造可行性研究。 本次增容改造由于原烟气中502浓度提高和要求更高的脱硫效率，需要提高原SO:吸 收系统的吸收能力，通过方案比选优先采用保留原有三层喷淋层，在烟气入口与原底层喷 淋层之间新增一层喷淋层和一层合金托盘，新增一台浆液循环泵对应向新增喷淋层供浆， 流量为8400衬爪，扬程18.6m。由于浆液喷淋量增幅较大和生成了更多的脱硫石膏，为了 保证足够的浆液循环停留时间和石膏固体停留时间，本次改造采用浆池抬高的方案，保持 现有的吸收塔塔径不变，将浆池抬高7.5m，吸收塔液位为17m，总的浆池容积达到2085扩， 浆液循环停留时间为4.67min。烟气50:排放浓度能够满足最新环保标准的要求。 关键词:菏泽电厂二期工程烟气脱硫增容改造可行性研究 Abstract Title: Feasibility studyon the second-phase project of the flue gas desulfurization capacity improvement in The Shandong Power Generation Co. Ltd. of Heze power plant Major: Environmental Engineering Name: Supervisor: Xue Tao Liu Yuling Li Xinghua Professor Sennior Enginer Signature: ,x“。沁 Signature: Zt} w lf}v勺 Signature:坤恤 Abstract The Shandong Power Generation Co. Ltd. of Heze power plant (hereinafter referred to as the Heze power plant 2x300MW) two subcritical coal-fired units desulfiuization project used for limestone gypsum wet process, by the construction contractor of Shandong three fmancial Environmental Engineering Co., Ltd., a furnace a tower desulfarization equipment, desulfurization in design of burning coal sulfur content of 1.7%, which means that the content of S02 FGh 3685mg/Nm3 for the entrance in the flue gas, flue gas quantity is 115.1x104Nm31h {standard state, stem base, 60/Q02}, the desulfurization device design of SO2, removal rate of not less than 950fa. The uncertainty sources of supply China coal market, coal sulfur content and design coal has certain deviation with the actual practice of Heze power plant flue gas desulfiuization system, entrance S02 concentration often exceed the design of desulfurization unit value, and with the implementation of the new air pollutant emission standards, Shandong Province thermal power plant air pollutant emission standards, clean gas the concentration of sulfur dioxide emissions has been unable to meet the new environmental standards. Therefore, the Heze power plant is intended to improve the capacity of the existing equipment to carry out the feasibility study on the capacity enhancement of the two phase No. 3 and No. 4 unit. This transformation due to Sq concentration in flue gas desulfurization efficiency and improve the original requirements higher; need to improve the original absorption capacity of S02 absorption system, the scheme comparison is adopted to keep the original three spraying layer, a new spraying layer and a layer of alloy tray between flue gas entrance and bottom spray layer, add a a slurry circulating pump corresponding to the new slurry spray layer, flux 8400m3/h, lift 18.6m. The slurry spray increased considerably and generate more gypsum slurry circulating, in order to ensure sufficient residence time and gypsum solid residence time, the transformation of the slurry pool elevation scheme, keep the absorption tower -to the existing path unchanged, will raise the 7.5m slurry tank, absorption tower level is 17m, the total volume III 西安理工大学工程硕士学位报告 IV of slurry pond 2085m 3 , slurry circulation time is 4.67min. The SO 2 emission concentration of flue gas can meet the requirements of the latest environmental protection standards. Key words: Heze power plant second-phase project flue gas desulfurization Capacity improvement feasibility study目录 i 目 录 1 绪论 ..................................................................... 1 1.1 研究背景.............................................................. 1 1.2 主要研究内容 ......................................................... 1 1.3 国内外脱硫装置的研究及本项目工艺选择 ................................. 2 1.3.1 吸收剂制备系统 .................................................... 3 1.3.2 烟气系统.......................................................... 3 1.3.3 SO 2 吸收系统 ......................................................3 1.3.4 石膏脱水系统 ...................................................... 4 1.3.5 工艺水系统........................................................ 4 1.3.6 排空系统.......................................................... 5 1.3.7 脱硫废水的处理 .................................................... 5 1.4 主要改造设计原则 ..................................................... 5 1.4.1 建设规模.......................................................... 5 1.4.2 燃煤含硫量 ........................................................ 6 1.4.3 烟气脱硫系统指标 .................................................. 6 1.4.4 烟气系统 .......................................................... 6 1.4.5 脱硫场地 .......................................................... 6 1.4.6 脱硫设备 .......................................................... 6 2 #3、#4 机组原脱硫装置 .................................................... 7 2.1 电厂主要设备参数 ..................................................... 7 2.2 原脱硫装置设计基础数据 ............................................... 7 2.2.1 原设计煤质条件 .................................................... 7 2.2.2 原设计脱硫系统入口条件 ............................................ 7 2.2.3 石灰石品质条件 .................................................... 8 2.3 原脱硫工艺 ........................................................... 8 2.3.1 吸收剂制备系统 .................................................... 9 2.3.2 烟气系统.......................................................... 9 2.3.3 SO 2 吸收系统 ......................................................9 2.3.4 石膏脱水系统 ..................................................... 10 2.3.5 工艺水系统....................................................... 10 2.3.6 排空系统......................................................... 11 2.3.7 脱硫废水的处理 ................................................... 11 2.4 原脱硫装置主要设备 .................................................. 11西安理工大学工程硕士学位报告 ii 2.5 原脱硫装置现场摸底试验及评估情况 .................................... 14 3 改造工程建设条件........................................................ 15 3.1 工程场地与自然条件 .................................................. 15 3.1.1 地理位置 ........................................................ 15 3.1.2 交通运输 ........................................................ 15 3.1.3 气象条件 ........................................................ 15 3.1.4 工程地质 ........................................................ 16 3.2 改造煤质条件 ........................................................ 17 3.3 脱硫吸收剂供应条件 .................................................. 18 3.4 脱硫副产物处置和综合利用条件 ........................................ 18 3.5 可供脱硫的水、电、气等条件 .......................................... 18 3.5.1 脱硫系统的水源 .................................................. 18 3.5.2 脱硫装置的电源 .................................................. 20 3.5.3 脱硫装置的气源 .................................................. 20 3.6 脱硫改造场地条件 .................................................... 20 4 脱硫工程设计............................................................ 23 4.1 设计基础参数 ........................................................ 23 4.2 脱硫岛布置 .......................................................... 23 4.2.1 总平面规划布置的设计原则 ........................................ 23 4.2.2 脱硫岛的总体布置 ................................................ 23 4.3 SO 2 吸收系统 ......................................................... 23 4.4 烟气系统 ............................................................ 26 4.4.1 系统阻力变化..................................................... 26 4.4.2 烟道系统......................................................... 26 4.5 吸收剂制备及浆液输送系统 ............................................ 26 4.6 石膏脱水系统 ........................................................ 27 4.7 废水处理系统 ........................................................ 27 4.8 工艺水系统 .......................................................... 27 4.9 排空系统 ............................................................ 27 4.10 压缩空气系统 ....................................................... 28 4.11 电气系统 ........................................................... 28 4.11.1 FGD 装置电气接线现况............................................ 28 4.11.2 改造后负荷统计及系统一、二次接线................................ 28 4.11.3 新增电气设备布置................................................ 29 4.11.4 电气系统改造新增设备清单........................................ 29目录 iii 4.11.5 电气负荷统计表 .................................................. 30 4.12 控制系统 ........................................................... 34 4.12.1 控制方式及控制水平 .............................................. 34 4.12.2 控制系统改造方案................................................ 34 4.12.3 电源和气源 ...................................................... 35 4.13 土建 ............................................................... 35 4.13.1 总设置.......................................................... 35 4.13.2 结构部分........................................................ 35 4.13.3 建（构）筑物基础及基础处理 ...................................... 36 4.14 脱硫改造技术参数 ................................................... 36 4.15 脱硫改造新增设备 ................................................... 38 5 社会及环境效益 .......................................................... 41 5.1 电厂 SO 2 控制现状 .....................................................41 5.2 本期 SO 2 控制措施及效益 ...............................................41 5.3 粉尘、脱硫灰渣及噪声处理效果 ........................................ 41 5.3.1 粉尘............................................................. 41 5.3.2 脱硫石膏......................................................... 41 5.3.3 噪声............................................................. 41 5.4 处理效果 ............................................................ 41 5.5 节约用水和合理利用能源 .............................................. 42 5.5.1 节约用水 .......................................................... 42 5.5.2 合理利用能源 ...................................................... 42 6 劳动安全与职业卫生 ...................................................... 43 6.1 概 述 .............................................................. 43 6.2 防火、防爆 .......................................................... 43 6.3 防尘、防毒、防化学伤害 .............................................. 43 6.4 防电伤、防机械伤害及其它伤害 ........................................ 43 6.4.1 防电伤........................................................... 43 6.4.2 防机械伤害及其它伤害 ............................................. 44 6.5 防暑、防寒、防潮 .................................................... 44 6.6 防噪声、防振动 ...................................................... 44 7 工程项目实施条件及轮廓进度 .............................................. 47 7.1 工程项目实施条件 .................................................... 47 7.1.1 施工电源、水源及通信 ............................................. 47 7.1.2 施工场地......................................................... 47西安理工大学工程硕士学位报告 iv 7.1.3 大部件运输条件 .................................................. 47 7.2 改造工程轮廓进度 .................................................... 47 8 投资估算及经济性评价.................................................... 49 8.1 投资估算编制说明 .................................................... 49 8.1.1 投资估算编制依据 ................................................ 49 8.1.2 其它说明 ........................................................ 49 8.1.3 工程估算及投资计列范围 .......................................... 50 8.2 投资概况 ............................................................ 50 8.3 投资估算计算表 ...................................................... 50 8.4 经济评价 ............................................................ 50 8.4.1 评价依据 ........................................................ 50 8.4.2 评价条件 ........................................................ 50 8.4.3 综合运行成本分析 ................................................ 51 9 总结.................................................................... 53 致谢...................................................................... 55