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某钢铁公司煤气综合利用发电工程申请报告

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2019-04-30
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某钢铁公司煤气综合利用发电工程申请报告XX公司二〇XX年十一月目录1项目申报单位情况····································································12拟建项目概况··········································································22.1概述··················································································22.2热负荷···············································································32.3电力系统············································································32.4煤气供应·····················································

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某钢铁公司煤气综合利用发电工程申请报告XX公司二〇XX年十一月目录1项目申报单位情况····································································12拟建项目概况··········································································22.1概述··················································································22.2热负荷···············································································32.3电力系统············································································32.4煤气供应············································································42.6厂址条件··········································································122.7燃气电站工程设想······························································122.8劳动安全及工业卫生···························································392.9消防················································································462.10组织机构及岗位定员··························································482.11工程项目实施的条件和轮廓进度···········································502.12招标···············································································543发展规划、产业政策和行业准入分析···········································573.1发展规划分析····································································573.2产业政策分析····································································574资源开发及综合利用分析··························································584.1原有煤气的利用·································································584.2资源开发方案····································································584.3资源利用方案····································································585节能方案分析·········································································605.1编制依据··········································································625.2项目能源消耗种类和数量分析···············································645.3项目所在地能源供应状况分析···············································665.4节能措施分析····································································665.5能源管理··········································································695.6节能效果分析结论与建议·····················································696建设用地与相关规划································································716.1项目建设用地区域情况························································716.2项目布局规划情况······························································717生态环境影响分析···································································727.1项目周围环境现状······························································727.2环境影响评述····································································727.3污染防治措施····································································747.4环保设施的投资估算···························································777.5主要生态影响····································································777.6环境监测制度及环境管理建议···············································798经济影响分析·········································································808.1投资估算·········································································808.2财务评价·········································································858.3经济费用效益分析·····························································928.4行业影响分析···································································938.5区域经济影响分析·····························································938.6宏观经济影响分析·····························································938.7主要技术经济指标·····························································939社会影响效果分析···································································959.1社会影响效果分析······························································959.2社会适应性分析·································································959.3社会风险及对策分析···························································9510建议与结论··········································································97附图:1、全厂总平面图XDGT/MQFD/ZPM-012、煤气余热发电原则性热力系统图XDGT/MQFD/YZRLXT-023、煤气系统图XDGT/MQFD/MQXT-034、燃烧系统图XDGT/MQFD/RSXT-045、原则性化学水流程图XDGT/MQFD/HSLC-056、水量平衡图XDGT/MQFD/SLPH-067、电站电气主接线图XDGT/MQFD/ZJX-078、自动化系统图XDGT/MQFD/ZKXT-089、±0.000平面布置图XDGT/MQFD/LM-0910、8.000平面布置图BGGT/MQFD/YZ-1011、主厂房纵断面图BGGT/MQFD/ZDM-1111项目申报单位情况某22拟建项目概况2.1概述2.1.1项目概述本项目项目性质:项目承办单位:法人代表:项目名称:某项目建设地点:建设起止年限:2.1.2建设规划及运行方式:建设规模为三炉三机,即3台50MW汽轮发电机组配3台220t/h煤气锅炉。由于本电站是以富余的煤气为燃料,电站的运行时间主要取决于公司高炉、转炉的生产及运行情况,根据同行业的运行经验,本电站发电设备按年运行7200小时核算。2.1.3建设必要性某钢铁公司现有1080m3高炉3座,580m3高炉2座,60t顶底复吹转炉2座,80t转炉1座及配套连铸机;同时产生低压高炉煤气540000Nm3/h、转炉煤气90000Nm3/h,除厂内自用外,剩余426390Nm3/h高炉煤气和79950Nm3/h的转炉煤气要向大气排放。煤气中的CO、H2等可燃性气体,高炉煤气平均热值为3020kJ/Nm3,转炉煤气平均热值为7210kJ/Nm3。这些3可利用的资源排向大气,不仅严重污染了环境,危害周边地区人民群众的身心健康,同时也浪费了大量可利用的煤气能源。根据国家发改委发布的《“十二五”资源综合利用指导意见》的精神,为了从根本上避免上述污染与浪费的问题,本公司拟建一座以煤气为燃料的发电机组,将需要排放的煤气燃烧发电,为企业生产提供电力,富余电力在当地上网,从而达到节能降耗、充分利用能源、有效保护环境的目的。钢铁企业是用电的大户,本期工程建成后,可提供148.5MW的廉价电力,这对降低公司的生产成本,缓解电网供电紧张局面是十分有益的。综上所述,某钢铁公司利用富余煤气发电,在其厂区原有预留的空地上建设一座燃气发电机组,符合国家的有关政策,经济效益、社会效益、环保效益非常显著,其建设是十分必要的。2.2热负荷某钢铁公司厂区内部的生产、生活和采暖供热由转炉余热提供,故本期煤气发电站的建设不考虑供热负荷。2.3电力系统2.3.1电力系统概述某钢铁公司附近有XX驿变电所1座,变电所内为6台变压器并联运行。110kV高压室由8台配电柜组成,10kV配电室由158台柜组成,二次保护均采用微机综保,最大输出负荷520000kW,此变电站利用100台高压配电柜向某钢铁公司供电。本公司设有28座10kV高压配电室,分别为:高炉鼓风机高压配电室、高炉中心高压配电室、烧结高压配电室、炼钢高压配电室、轧钢高压配电4室、白灰高压配电室、制氧高压配电室。2.3.2电力负荷预测及电量平衡:某钢铁公司近几年有了很大发展,全厂10kV高压电机装机容量约为30万kVA,正常生产时用电负荷约为400MW。本期煤气综合利用发电项目,安装三台50MW煤气发电机组。按照设计负荷运行时,机组可发电165MW,扣除电厂自用电后,可向生产提供约148.5MW的电力,供电量约占公司用电量的37.13%。因此,电站建成后,所发电力仅作为公司用电的补充,不需向外供电。2.3.3接入系统方案本工程为三台50MW汽轮发电机组,出口电压为10.5kV。本工程发电机所发电量除供给厂用电外,分别经两台主变升压后,接至厂内升压站110kV母线,并经两回110kV架空线路与系统并网,详见一次主接线图。110kV变电所距煤气电站接线距离较短。2.4煤气供应2.4.1煤气来源某钢铁公司现1080m3高炉3座,580m3高炉2座,60t顶底复吹转炉2座,80t转炉1座,可产高炉煤气量540000Nm3/h、转炉煤气量90000Nm3/h。2.4.2燃料平衡公司3座1080m3高炉、2座580m3高炉和2座60t转炉、1座80t转炉,副产高炉煤气540000Nm3/h、转炉煤气90000Nm3/h,除自用外,剩余的煤气还可进行燃烧发电。煤气平衡表见表2-1、表2-2.表2-1高炉煤气平衡表5序号名称产气量(Nm3/h)耗气量(Nm3/h)1高炉煤气5400002高炉自身消耗661003烧结机消耗76004炼钢消耗254005其他145106小计5400001136107可用于本期发电426390表2-2转炉煤气平衡表序号名称产气量(Nm3/h)耗气量(Nm3/h)1转炉煤气900002转炉自身消耗60003烧结机消耗7504炼钢消耗23005其他10006小计90000100507可用于本期发电799502.4.3煤气成份:根据某钢铁公司提供的有关技术资料,其煤气成份见表2-3、表2-4。表2-3高炉煤气成份项目CO%O2%CO2%H2%N2%CH4%其他%含尘量mg/Nm3热值kJ/Nm3煤气24.20.813.51.059.60.40.5<83066表2-4转炉煤气成份项目CO%O2%CO2%H2%N2%CH4%水分%含尘量mg/Nm3热值kJ/Nm3煤气60.20.214.6/19.3/5.7<5728562.4.4煤气耗量:发电设备年利用小时数按7200小时计算,电站按设计负荷运行时锅炉燃料耗量计算结果见表2-5。表2-5锅炉燃料消耗量计算成果表项目单位非采暖期每小时燃高炉煤气量Nm3/h426390每日燃高炉煤气量Nm3/d10233360每年燃高炉煤气量万Nm3/a307001每小时燃转炉煤气量Nm3/h79950每日燃转炉煤气量Nm3/d1918800每年燃高转煤气量万Nm3/a57564由于高炉和转炉所产煤气量除消耗外能提供426390Nm3/h高炉煤气和79950Nm3/h转炉煤气,而煤气发电站按设计负荷所需煤气量为426390Nm3/h高炉煤气和79950Nm3/h转炉煤气,所以高炉所产煤气量是可以满足电站利用的。2.4.5煤气输送为满足本工程的需要,需敷设从高炉、转炉煤气站到燃气电站的煤气管道,煤气站到燃气电站管管道全长约200m,管道为架空敷设。2.4.6点火燃料本锅炉点火燃料采用转炉煤气,由于钢厂现有转炉常年运行,可以保证煤气余热锅炉的点火需求。2.4.7锅炉蒸发量及发电量的计算a、蒸发量的计算7高炉煤气消耗量426390Nm3/h,煤气热值3066kJ/m3,转炉煤气消耗量79950Nm3/h,煤气热值7285kJ/m3,煤气锅炉热效率90%,过热蒸汽压力9.8MPa,温度540℃,过热蒸汽焓值3477kJ/kg,锅炉给水温度215℃,锅炉蒸发量核算如下:燃料放热量:426390×3066+79950×7285=1889747490(kJ/h)锅炉吸热量:1889747490×0.90=1700772741(kJ/h)锅炉蒸发量:1700772741/(3477-215×4.1868)=660(t/h)b、发电量的计算按照原则性热力系统图,汽机进气量218.5t/h,进汽焓值3477kJ/kg,汽机一级抽汽量11.68t/h,抽汽焓值3026kJ/kg,汽机二级抽汽量10.9t/h,抽汽焓值3019kJ/kg,汽机三级抽汽量9.89t/h,抽汽焓值2986kJ/kg,汽机四级抽汽量9.5t/h,抽汽焓值2943kJ/kg,汽机五级抽汽量9.1t/h,抽汽焓值2790kJ/kg,汽机六级抽汽量8.63t/h,抽汽焓值2660kJ/kg,汽轮机排汽量158.8t/h,排汽焓值2393.55kJ/kg,则汽轮机发电量计算如下:汽轮机入口焓值:3475×218.5/3600=210.91(MW)汽轮机排汽焓值:(3026×11.68+3019×10.9+2986×9.89+2943×9.5+2790×9.1+2660×8.63+2393.55×158.8)/3600=(35343.68+32907.1+29531.54+27958.5+25389+22955.8+380095.74)/3600=554181.22/3600=153.94(MW)汽轮机发电量为:8(210.91-153.94)×0.985×0.98=55(MW)三台汽轮机发电量55×3=165(MW)由于站用电率为10%,因此供电功率为:165×0.9=148.5(MW)机组年运行7200小时,因此机组发电量供电量分别为:发电量:165×7200×1000/10000=118800(万kWh)供电量:148.5×7200×1000/10000=106920(万kWh)2.5燃气电站装机方案及主要参数2.5.1锅炉选型锅炉选型主要与燃料特性及当地环保要求有关。根据以往工程的经验,本设计确定选用煤气锅炉。2.5.2汽机选型汽轮发电机组主要有三种机型:即背压(包括抽背)机、抽汽凝汽式和纯凝汽式汽轮发电机组。背压式机组是热电联产机组,没有冷源损失,系统热经济性最高,但由于背压机发电量随热负荷变化而变化,即以热定电,本工程主要目的是消化本公司高炉生产的富余煤气,本工程不需考虑热负荷,所以选用背压机是不合适的。抽凝机可以同时满足电、热两种负荷变化的需要,运转灵活、有抽汽的情况下热经济性较高,但抽凝机运行不如纯凝机稳定,且造价比纯凝机高,所以,本工程选用抽凝机也是不合适的。综上所述,针对工程的具体情况,纯凝机是本工程的合理选择。92.5.3装机方案及优化由于本工程为资源综合利用电厂,所消耗燃料为公司剩余的煤气,所以其装机容量取决于剩余煤气量,根据目前公司剩余的煤气量测算,本工程总装机容量为150MW的发电机组较为合适。根据上述条件,本期工程拟定以下两个装机方案并进行优化:方案I:3×N50-8.83纯凝机组配2×220t/h高压高温煤气锅炉。方案II:2×N100-8.83纯凝机组配2×410t/h高温高压煤气锅炉。设计认为,方案I和方案II的均可满足发电的目标,两方案相比较,方案I三台锅炉配套三台发电机机组,正常运行时单炉配单机负荷较近,运行操作调整方便,占地面积较大,投资较较多,同时能满足单台高炉运行时设备安全稳定经济运行的要求。方案II中,两台锅炉配两台汽轮发电机组,运行操作调整简便,占地相对较小,由于锅炉、汽轮机与煤气不能合理匹配,负荷率低,不能满机炉运行时,设备安全稳定经济运行的要求。为保证机组能够在额定负荷时,长期高效运行,经与有关设备制造厂家讨论,本报告推荐方案I。2.5.4技术经济指标:本工程方案的主要技术经济指标见表2-6表2-63×220t/h+3×N50-8.8主要技术经济指标序号项目单位指标1汽机进汽量(单台)t/h218.52汽机凝汽量(单台)t/h186.033发电功额定功率(单台)MW504锅炉蒸发量(单台)t/h22010序号项目单位指标5发电平均标煤耗(单台)kg/kWh0.376综合厂用电率%107供电年平均标煤耗率kg/kWh0.418年发电量(三台)kW.h/a11.88×1089年供电量(三台)kW.h/a10.692×10810机组年发电利用小时数h720011年平均全厂热效率%31.4312年节约标煤量(两台)万t/a37.422本煤气发电项目,由于煤气平均热值为3732kJ/Nm3,略高于常规煤气热值,燃烧效率较高,同时由于机组配套高温高压参数,因此发电煤耗偏低。2.5.5推荐方案机组主要技术参数采用方案的主机技术规范:锅炉参数:锅炉型号:NG220-9.81/540-Q额定蒸汽压力:9.81MPa额定蒸汽温度:540℃额定蒸发量:220t/h锅炉热效率:90%额定给水温度:215℃台数:3台汽轮机:型式:50MW高温高压纯凝式汽轮机11汽机型号:N50-8.83/535额定功率:50MW额定进汽温度:535℃额定进汽压力:8.83MPa进汽量:220t/h额定排汽压力:0.005MPa回热加热抽汽级数:6级(3低加,1除氧器,2高加)台数:3台由于循环冷却水采用中水,且在厂内不做深度处理,汽轮发电机凝汽器换热管选用满足中水要求的管材,保证机组安全稳定运行,增加凝汽器投资,降低水处理投资和运行费用。发电机:型号:QF-60-2额定功率:60MW额定电压:10kV额定电流:4120A功率因数:0.8额定频率:50Hz额定转速:3000r/min冷却方式:空冷台数:3台2.5.6汽水平衡12采用方案的汽水平衡详见表2-7。表2-7单台机组汽水平衡表类别项目单位数值锅炉新蒸汽9.81MPa锅炉蒸发量t/h220汽机进汽量t/h218.5汽水损失t/h3.63锅炉负荷率%100通过上述汽水平衡表可看到,满负荷发电时,锅炉负荷率为100%。2.6厂址条件2.6.1厂址概述2.6.1.1厂址地理位置:XX2.7燃气电站工程设想2.7.1总体规划及厂区总平面规划布置2.7.1.1全厂总体规划:某钢铁公司煤气发电工程,建在10万立方米煤气柜西侧(土地证号为迁国用(2011)第110870号),厂区主要包括主厂房、化学水车间及冷却塔等设施,占地面积约54000平方米,生产设施及辅助生产设施充分利用现有条件,生活福利设施由公司统一考虑,本电站不重复建设。本工程附近的道路已形成,本着充分利用,主要建筑物布置和原有建筑物相协调的原则布置。2.7.1.2规划布置原则:遵守国家现行有关规范、标准,符合国家有关规定。13在公司现有厂区给定区域内布置本工程所需的生产和辅助生产设施。工艺流程力求通顺,总体布置力求合理。其他考虑的因素包括:节约用地、压低基建投资,安全、卫生、防火、通风做到功能分区明确,管线短捷,空间处理协调,界区整齐美观。2.7.1.3总平面布置和竖向布置a、总平面布置根据工艺生产要求,结合厂区场地实际,本工程的总平面布置如下:在拟建区域西北侧由北向南依次布置烟囱及烟道、锅炉、除氧间、汽机房,冷却塔布置在发电场地南侧,循环水泵站布置在紧邻冷却塔路北侧,化水站布置在主厂房南侧,靠西侧布置,电气出线便捷,燃料输送距离短。b、竖向布置在竖向设计时,根据工厂的现有建筑物及场地标高,合理拟定电站车间的标高。工厂内已建有布局合理的雨水沟,工厂的雨水排除可得到可靠保证,故电站区域不再新建雨水沟,该区域的雨水汇入工厂已有的雨水排除系统。2.7.1.4管线及沟道布置:a、站区管网布置原则(1)工业用水、消防用水来自某钢铁公司供水管网;生活污水和生产废水处理合格后排入站外原污水管;(2)雨水通过管道排入站外雨水管道;(3)主厂房内设环形消防供水管网,主厂房外四周设消防水管以满足消防要求;14(4)循环水管由主厂房A列引至冷却塔。b、厂区管网敷设方式:循环水管、工业水管、消防水管、生活污水及生产废水管道均采用地下直埋。煤气输送管道采用架空方式。2.7.1.5交通运输站区四周设环形道路,主要道路路宽为6m,本期工程主厂房出入口设引道,引至主厂房外侧环形道上。道路型式采用城市型,路面材料为混凝土路面,采用双向排水坡度,转弯半径为9m,以满足生产及消防要求。2.7.1.6站区绿化站区绿化采取点、线、面结合的规划原则,沿道路的围墙尽量种植草坪、树木、力求创造优美的站区环境,在绿化树种的选择上应结合当地习惯和具体条件,重点绿化站前区。2.7.1.7站区技术经济指标站区主要土地利用技术指标如下:1、站区占地面积(m2)540002、本期工程容量(MW)1503、单位容量占地面积(m2/kW)0.364、站区建筑物占地面积(m2)166185、站区建筑面积(m2)196025、站区内道路面及广场地坪面积(m2)120006、站区内场地利用面积(m2)83007、建筑系数(%)30.8158、道路广场系数(%)22.229、利用系数(%)15.3710、绿化面积(m2)1708211、绿化系数(%)31.6112、构筑物容积(万m3)80.382.7.2煤气输送a、煤气锅炉燃料耗量某钢铁公司煤气电站规模为3台50MW汽轮发电机配套3台220t/h煤气锅炉。全厂按设计负荷发电时煤气的耗量见表2-8。表2-8锅炉煤气消耗量序号项目单位煤气耗量1每小时煤气消耗量m3/h5063402每日煤气消耗量m3/h121521603每年煤气消耗量万m3/h364564.8全年燃烧煤煤气量按7200小时计算。b、煤气锅炉煤气输送系统厂内的煤气输送管道均采用架空布置,根据有关规范的要求,在进入锅炉前,设置快速切断阀、安全阀、放散阀等,燃气通过两个支管从锅炉两侧送进燃烧器,为保证密封的可靠性,部分阀门将采用水封阀或盲板阀。2.7.3燃烧系统及辅助设备选择:锅炉燃烧系统见附图。a、燃烧系统及辅助设备选择本期工程锅炉为烧煤气锅炉,煤气经管道送至炉前,再通过燃烧器送16入炉膛燃烧。燃烧生成的烟气经过热器、省煤器、空气预热器换热后由引风机抽出,通过高100m、出口直径3.0m的钢砼烟囱排入大气。因煤气属易燃、易爆气体,炉前煤气管道上设置有调压阀、安全阀、阻火器等设施,以保证煤气炉燃烧系统的安全、稳定燃烧。系统设有鼓风机、引风机,且均无备用,因此,要求采用性能好,运行稳定可靠,检修周期长的优质产品。b、燃烧系统主要辅属设备燃烧系统主要辅助设备选型如下:(1)引风机风量330000m3/h风压2640pa电动机功率650kW/10kV转速960r/min数量2台(2)鼓风机风量120000m3/h风压5340pa电动机功率500kW/10kV转速1450r/min数量2台(3)烟囱本工程拟建三座钢砼烟囱。高度H=100m,出口内径为3.0m。锅炉17满负荷运行时,烟气流速为18m/s。(4)除尘器每台锅炉配备静…
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