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电伴热用于光热电站的安全运行

时(shi)间:2022-05-21 20:39:10 来源: 点击:35622次(ci)

电伴热用于光热电站的安全运行

中(zhong)(zhong)国(guo)(guo)航(hang)天(tian)科技(ji)股份有限公司( casc )发(fa)行的(de)(de)(de)(de)(de)(de)(de)牌匾(bian)悬(xuan)挂在(zai)(zai)沈阳(yang)(yang)(yang)(yang)(yang)中(zhong)(zhong)色(se)(se)温(wen)(wen)(wen)度(du)计(ji)(ji)材料(liao)研(yan)究(jiu)所(以(yi)下简称沈阳(yang)(yang)(yang)(yang)(yang)中(zhong)(zhong)色(se)(se))的(de)(de)(de)(de)(de)(de)(de)办公楼里,以(yi)表彰(zhang)沈阳(yang)(yang)(yang)(yang)(yang)中(zhong)(zhong)色(se)(se)对中(zhong)(zhong)国(guo)(guo) 个月(yue)球探测项(xiang)目(mu)(mu)(mu)“e - 1”和(he)(he)(he)“嫦娥三号”运(yun)(yun)载火箭(jian)的(de)(de)(de)(de)(de)(de)(de)贡(gong)献。是(shi)。为(wei)(wei)(wei)什么从(cong)事(shi)电(dian)(dian)(dian)(dian)(dian)伴(ban)热(re)(re)(re)(re)产(chan)(chan)品(pin)(pin)开发(fa)、生(sheng)产(chan)(chan)和(he)(he)(he)销售的(de)(de)(de)(de)(de)(de)(de)私营公司提(ti)供高端航(hang)空航(hang)天(tian)技(ji)术(shu)项(xiang)目(mu)(mu)(mu)?10月(yue)30日下午,CSPPLAZA由北京(jing)(jing)天(tian)瑞星光热(re)(re)(re)(re)科技(ji)有限公司赞(zan)助(zhu),CSPPLAZA成(cheng)(cheng)员单位(wei)在(zai)(zai)csplaza第四阶段 调查(cha)研(yan)究(jiu)活动(dong)中(zhong)(zhong)赞(zan)助(zhu)。据了(le)解,沈阳(yang)(yang)(yang)(yang)(yang)中(zhong)(zhong)色(se)(se)长期(qi)(qi)以(yi)来一(yi)(yi)(yi)直为(wei)(wei)(wei)石(shi)油(you)、化工、电(dian)(dian)(dian)(dian)(dian)力(li)、冶(ye)金、机械和(he)(he)(he)军(jun)事(shi)行业(ye)的(de)(de)(de)(de)(de)(de)(de)客户(hu)和(he)(he)(he)研(yan)究(jiu)机构提(ti)供配套产(chan)(chan)品(pin)(pin)和(he)(he)(he)技(ji)术(shu)服(fu)务(wu)(wu)。现在(zai)(zai),这(zhei)家(jia)从(cong)事(shi)温(wen)(wen)(wen)度(du)测量(liang)和(he)(he)(he)电(dian)(dian)(dian)(dian)(dian)伴(ban)热(re)(re)(re)(re)领(ling)(ling)域多年(nian)的(de)(de)(de)(de)(de)(de)(de)高科技(ji)公司已经(jing)(jing)进入太阳(yang)(yang)(yang)(yang)(yang)能行业(ye),成(cheng)(cheng)为(wei)(wei)(wei)中(zhong)(zhong)国(guo)(guo) 家(jia)进入该行业(ye)的(de)(de)(de)(de)(de)(de)(de)公司。在(zai)(zai)这(zhei)一(yi)(yi)(yi)领(ling)(ling)域取得成(cheng)(cheng)功(gong)的(de)(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)子(zi)和(he)(he)(he)服(fu)务(wu)(wu)提(ti)供商。到(dao)目(mu)(mu)(mu)前为(wei)(wei)(wei)止,浸没式太阳(yang)(yang)(yang)(yang)(yang)颜色(se)(se)可(ke)(ke)以(yi)为(wei)(wei)(wei)光热(re)(re)(re)(re)发(fa)电(dian)(dian)(dian)(dian)(dian)领(ling)(ling)域提(ti)供主要(yao)的(de)(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)伴(ban)热(re)(re)(re)(re)产(chan)(chan)品(pin)(pin),包(bao)括预冷端矿物(wu)绝(jue)缘(yuan)+ * *和(he)(he)(he)温(wen)(wen)(wen)控专用(yong)加热(re)(re)(re)(re)装置(zhi),以(yi)及用(yong)于(yu)预热(re)(re)(re)(re)和(he)(he)(he)绝(jue)缘(yuan)位(wei)置(zhi)的(de)(de)(de)(de)(de)(de)(de)铠(kai)装矿物(wu)绝(jue)缘(yuan)+ * *如管道、阀门、阀杆、储罐等。用(yong)于(yu)温(wen)(wen)(wen)度(du)控制(zhi)的(de)(de)(de)(de)(de)(de)(de)专用(yong)电(dian)(dian)(dian)(dian)(dian)伴(ban)热(re)(re)(re)(re)装置(zhi)有更多的(de)(de)(de)(de)(de)(de)(de)目(mu)(mu)(mu)标。为(wei)(wei)(wei)大(da)型(xing)阀门和(he)(he)(he)泵体(ti)设计(ji)(ji)和(he)(he)(he)开发(fa)的(de)(de)(de)(de)(de)(de)(de)可(ke)(ke)拆(chai)卸专用(yong)电(dian)(dian)(dian)(dian)(dian)伴(ban)热(re)(re)(re)(re)设备(bei)需要(yao)定期(qi)(qi)维(wei)护。从(cong)德令哈(ha)盐熔(rong)融塔项(xiang)目(mu)(mu)(mu)开始。光热(re)(re)(re)(re)发(fa)电(dian)(dian)(dian)(dian)(dian)站的(de)(de)(de)(de)(de)(de)(de)传热(re)(re)(re)(re)介质(zhi),无论是(shi)水、导热(re)(re)(re)(re)油(you)还是(shi)熔(rong)盐,在(zai)(zai)流(liu)(liu)经(jing)(jing)管道、阀门和(he)(he)(he)流(liu)(liu)动(dong)时间时,都有不(bu)同(tong)程度(du)的(de)(de)(de)(de)(de)(de)(de)结(jie)霜风险(xian)。一(yi)(yi)(yi)旦结(jie)霜,将(jiang)会给系统的(de)(de)(de)(de)(de)(de)(de)安全运(yun)(yun)行带来极大(da)的(de)(de)(de)(de)(de)(de)(de)危害。特别(bie)是(shi)在(zai)(zai)中(zhong)(zhong)国(guo)(guo)西部(bu)的(de)(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)厂(chang)环境中(zhong)(zhong),更低 温(wen)(wen)(wen)度(du)可(ke)(ke)以(yi)达到(dao)40℃以(yi)下,系统冻结(jie)的(de)(de)(de)(de)(de)(de)(de)风险(xian)很大(da)。因此,必须(xu)(xu)配备(bei)电(dian)(dian)(dian)(dian)(dian)伴(ban)热(re)(re)(re)(re)装置(zhi),特别(bie)适用(yong)于(yu)以(yi)熔(rong)盐为(wei)(wei)(wei)介质(zhi)的(de)(de)(de)(de)(de)(de)(de)光热(re)(re)(re)(re)发(fa)电(dian)(dian)(dian)(dian)(dian)厂(chang)。电(dian)(dian)(dian)(dian)(dian)伴(ban)热(re)(re)(re)(re)是(shi)必不(bu)可(ke)(ke)少的(de)(de)(de)(de)(de)(de)(de)关键产(chan)(chan)品(pin)(pin)。必须(xu)(xu)实(shi)施(shi)“一(yi)(yi)(yi)个作业(ye),一(yi)(yi)(yi)个设备(bei)”,以(yi)避免一(yi)(yi)(yi)些跟踪失败,并(bing)快速更换备(bei)用(yong)线路(lu)(lu)。2014年(nian)夏(xia)天(tian),沈阳(yang)(yang)(yang)(yang)(yang)zto收到(dao)了(le)太阳(yang)(yang)(yang)(yang)(yang)能和(he)(he)(he)火力(li)发(fa)电(dian)(dian)(dian)(dian)(dian)领(ling)(ling)域的(de)(de)(de)(de)(de)(de)(de) 浙江(jiang)钟忠的(de)(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)子(zi)邮件。另一(yi)(yi)(yi)家(jia)公司正准备(bei)在(zai)(zai)德令哈(ha)建造一(yi)(yi)(yi)座10兆瓦的(de)(de)(de)(de)(de)(de)(de)熔(rong)盐光伏发(fa)电(dian)(dian)(dian)(dian)(dian)项(xiang)目(mu)(mu)(mu)塔。经(jing)(jing)过一(yi)(yi)(yi)年(nian)多的(de)(de)(de)(de)(de)(de)(de)调查(cha)和(he)(he)(he)交流(liu)(liu),双方正式开始合作,并(bing)于(yu)2016年(nian)7月(yue)底完成(cheng)(cheng)交付。本(ben)工程电(dian)(dian)(dian)(dian)(dian)伴(ban)热(re)(re)(re)(re)系统采用(yong)中(zhong)(zhong)彩设计(ji)(ji)、生(sheng)产(chan)(chan)、安装和(he)(he)(he)维(wei)护。效果(guo)明显,质(zhi)量(liang)稳定。从(cong)那(nei)以(yi)后,沈阳(yang)(yang)(yang)(yang)(yang)成(cheng)(cheng)功(gong)地进入光热(re)(re)(re)(re)发(fa)电(dian)(dian)(dian)(dian)(dian)行业(ye),开辟了(le)护送光热(re)(re)(re)(re)项(xiang)目(mu)(mu)(mu)的(de)(de)(de)(de)(de)(de)(de)道路(lu)(lu)。陈晓表示,沈阳(yang)(yang)(yang)(yang)(yang)蔡中(zhong)(zhong)始终坚持设计(ji)(ji)、生(sheng)产(chan)(chan)、安装和(he)(he)(he)维(wei)护整个业(ye)务(wu)(wu)流(liu)(liu)程的(de)(de)(de)(de)(de)(de)(de)一(yi)(yi)(yi)体(ti)化发(fa)展,就具体(ti)项(xiang)目(mu)(mu)(mu)与(yu)客户(hu)进行面(mian)对面(mian)的(de)(de)(de)(de)(de)(de)(de)深入沟通,积(ji)极加强(qiang)与(yu)设计(ji)(ji)师的(de)(de)(de)(de)(de)(de)(de)沟通和(he)(he)(he)沟通。业(ye)主,准确掌握(wo)设计(ji)(ji)要(yao)求和(he)(he)(he)客户(hu)要(yao)求,为(wei)(wei)(wei)客户(hu)提(ti)供适用(yong)的(de)(de)(de)(de)(de)(de)(de)产(chan)(chan)品(pin)(pin)。经(jing)(jing)过多年(nian)的(de)(de)(de)(de)(de)(de)(de)技(ji)术(shu)积(ji)累(lei)和(he)(he)(he)市(shi)场(chang)深度(du)培育(yu),除(chu)了(le)上述10MW项(xiang)目(mu)(mu)(mu)外,信阳(yang)(yang)(yang)(yang)(yang)中(zhong)(zhong)赛(sai)开发(fa)和(he)(he)(he)生(sheng)产(chan)(chan)的(de)(de)(de)(de)(de)(de)(de)金属(shu)包(bao)覆矿物(wu)绝(jue)缘(yuan)电(dian)(dian)(dian)(dian)(dian)伴(ban)热(re)(re)(re)(re)带和(he)(he)(he)其他(ta)电(dian)(dian)(dian)(dian)(dian)伴(ban)热(re)(re)(re)(re)产(chan)(chan)品(pin)(pin)和(he)(he)(he)服(fu)务(wu)(wu)也已成(cheng)(cheng)功(gong)应用(yong)于(yu)北京(jing)(jing)朝阳(yang)(yang)(yang)(yang)(yang)市(shi)张家(jia)口的(de)(de)(de)(de)(de)(de)(de)15MW改进型(xing)feynnix热(re)(re)(re)(re)电(dian)(dian)(dian)(dian)(dian)厂(chang)。

电伴热用于光热电站的安全运行-河北山依电热科技

不同电伴(ban)热要求下的(de)非(fei)对(dui)等电伴(ban)热方案

沈阳中(zhong)色科技部长李芳芳在研讨会上表(biao)示(shi),电(dian)伴热(re)(re)(re)主要(yao)(yao)应用于三个(ge)地方:管(guan)道(包括(kuo)阀门、熔盐管(guan)、水管(guan))、水箱、仪器设备等。由(you)于对跟踪(zong)温度(du)的要(yao)(yao)求不(bu)同(tong),采用的电(dian)伴热(re)(re)(re)方案也(ye)不(bu)尽相同(tong)。例如,需要(yao)(yao)电(dian)伴热(re)(re)(re)维持的冷(leng)(leng)盐管(guan)和冷(leng)(leng)盐罐的温度(du)通常(chang)在290 - 300摄(she)(she)氏(shi)度(du)之间,而热(re)(re)(re)盐罐的温度(du)在500摄(she)(she)氏(shi)度(du)以上。根据不(bu)同(tong)项目的温度(du)和电(dian)伴热(re)(re)(re)时间要(yao)(yao)求,结合电(dian)伴热(re)(re)(re)功率、保温厚度(du)、导(dao)热(re)(re)(re)系数(shu)、管(guan)道厚度(du)、罐重等参数(shu),可(ke)以计(ji)算出需要(yao)(yao)补偿的热(re)(re)(re)电(dian)量。需要(yao)(yao)安装一条电(dian)伴热(re)(re)(re)。

不(bu)(bu)同技术路线的(de)(de)(de)火电(dian)(dian)(dian)(dian)厂的(de)(de)(de)电(dian)(dian)(dian)(dian)伴(ban)(ban)热(re)(re)要(yao)(yao)(yao)求也会有很大的(de)(de)(de)差异。李芳芳指出的(de)(de)(de)主要(yao)(yao)(yao)目的(de)(de)(de)在水(shui)质电(dian)(dian)(dian)(dian)站(zhan)安(an)装电(dian)(dian)(dian)(dian)伴(ban)(ban)热(re)(re)是防止冻结,确保(bao)水(shui)管道不(bu)(bu)会冻结时(shi)温(wen)度(du)较(jiao)低,和的(de)(de)(de)工作温(wen)度(du)范围内(nei)跟(gen)踪区(qu)域通(tong)常是100到(dao)200摄(she)(she)(she)氏(shi)度(du)。水(shui)质电(dian)(dian)(dian)(dian)站(zhan)通(tong)常在白天不(bu)(bu)需(xu)要(yao)(yao)(yao)启动电(dian)(dian)(dian)(dian)伴(ban)(ban)热(re)(re),但必须(xu)在夜间温(wen)度(du)较(jiao)低时(shi)启动,否(fou)则阀门和管道会冻结和破裂。一(yi)般来说,水(shui)的(de)(de)(de)加(jia)热(re)(re)需(xu)求温(wen)度(du)为12,这(zhei)就保(bao)证了工作液的(de)(de)(de)水(shui)温(wen)总是高于12。熔盐槽式(shi)和熔盐塔式(shi)光、热(re)(re)电(dian)(dian)(dian)(dian)站(zhan)对电(dian)(dian)(dian)(dian)伴(ban)(ban)热(re)(re)的(de)(de)(de)要(yao)(yao)(yao)求要(yao)(yao)(yao)高得多(duo)。熔融(rong)盐的(de)(de)(de)凝固点(dian)为220摄(she)(she)(she)氏(shi)度(du),安(an)全(quan)温(wen)度(du)为260摄(she)(she)(she)氏(shi)度(du)。熔融(rong)盐电(dian)(dian)(dian)(dian)伴(ban)(ban)热(re)(re)系统必须(xu)始(shi)终(zhong)保(bao)持温(wen)度(du)在260摄(she)(she)(she)氏(shi)度(du)以上。这(zhei)就需(xu)要(yao)(yao)(yao)建设(she)更(geng)多(duo)的(de)(de)(de)电(dian)(dian)(dian)(dian)伴(ban)(ban)热(re)(re)带,使其能够(gou)安(an)全(quan)稳定地(di)长期(qi)运行。

电(dian)伴热(re)系统(tong)的(de)(de)(de)解决方案不仅包(bao)括按要求铺(pu)设发热(re)电(dian)缆,还包(bao)括电(dian)伴热(re)带控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)系统(tong)的(de)(de)(de)安装。目前常用的(de)(de)(de)控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)方法(fa)有(you)局部控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)和硅控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。后者(zhe)是昂贵的(de)(de)(de),但可以实(shi)现(xian)远程控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。加热(re)功率(lv)可通过(guo)调节电(dian)压控(kong)(kong)制(zhi)(zhi)(zhi)(zhi),跟(gen)踪可通过(guo)脉冲信号控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)。温度高(gao)(gao),自动化程度高(gao)(gao),无局部过(guo)热(re),提高(gao)(gao)了跟(gen)踪区域的(de)(de)(de)使(shi)用寿命,有(you)效(xiao)保(bao)证了系统(tong)和跟(gen)踪电(dian)缆的(de)(de)(de)基本恒(heng)温。从趋势来看,SCR控(kong)(kong)制(zhi)(zhi)(zhi)(zhi)方案正成为光热(re)工程的(de)(de)(de) 方案。

初始成本低,但功(gong)耗成本太高。

陈晓表示,根据不(bu)同(tong)的项目的实(shi)际需要,功率跟踪(zong)方(fang)案的总(zong)投资成(cheng)本分配给他(ta)们变化很大,但总(zong)的来说,整个(ge)光伏电站的投资低于1%,包括(kuo)产品采购和安装成(cheng)本,但上述系统的重要性是(shi)不(bu)允许的。忽视。

除了(le)管长、控制(zhi)方式等因素外,投(tou)资成(cheng)本(ben)是影响相(xiang)同电(dian)厂(chang)条件下电(dian)厂(chang)预热(re)(re)时(shi)(shi)间的(de)(de)主要因素。李芳芳解(jie)释说,当电(dian)厂(chang) 次启(qi)动(dong)、关闭后重(zhong)新启(qi)动(dong)时(shi)(shi),系统需要预热(re)(re)。对预热(re)(re)时(shi)(shi)间的(de)(de)需求直(zhi)接(jie)影响到功(gong)率跟踪的(de)(de)投(tou)资。业主尽量延长预热(re)(re)时(shi)(shi)间。在发电(dian)厂(chang)的(de)(de)整个生(sheng)命(ming)周期中(zhong),热(re)(re)身的(de)(de)次数相(xiang)对较(jiao)少。虽然启(qi)动(dong)速度会(hui)因为(wei)预热(re)(re)时(shi)(shi)间的(de)(de)增加(jia)而降低,但是功(gong)率跟踪的(de)(de)投(tou)资成(cheng)本(ben)会(hui)大(da)大(da)降低。同时(shi)(shi),电(dian)伴热(re)(re)带(dai)的(de)(de)铺设密度越大(da),建筑成(cheng)本(ben)越高,施(shi)工难度越大(da)。

虽然(ran)电伴(ban)(ban)热(re)的(de)初始投资成本不(bu)高(gao),但电伴(ban)(ban)热(re)的(de)功耗(hao)非常大。光(guang)热(re)电站的(de)辅助功耗(hao)比(bi)约为10%,电伴(ban)(ban)热(re)占(zhan)2% - 3%。高(gao)功耗(hao)的(de)成本不(bu)容忽视(shi)。李芳(fang)芳(fang)认为,从(cong)(cong)长远来(lai)看,通过加(jia)厚保温层,减(jian)少夜(ye)间热(re)损失,可(ke)以(yi)有效降(jiang)低(di)功率跟踪的(de)使用(yong),从(cong)(cong)而降(jiang)低(di)功耗(hao)。此(ci)外,提高(gao)电伴(ban)(ban)热(re)产品的(de)性能也是努力的(de)方向。

考察(cha)期(qi)间(jian),代表团参观了沈阳中色生产车间(jian),了解了电伴热带产品的生产过(guo)程


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