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湖北当阳爆炸21名遇难者身份确定 6名责任人被控制

2016-08-13 10:11:33   新京报

8月11日拍摄的事故现场。新华社发

焦点:此次高压蒸汽管道破裂原因何在?

该电厂一名员工向重案组37号介绍,爆炸点位于一栋五层楼厂房,长80多米,宽30多米,各层都布局了形如长城烽火台状的管道。一楼有两台大型发电机,屋后有三座巨大的锅炉。

蒸汽外泄点位于三楼的中控台,长约20米,中控台与管道之间为双层玻璃隔开。管道直径426mm,外层包有300mm左右厚度的白色保温棉。“一靠近就全身发热,站两分钟就满头大汗,不到10分钟就要到外面去喘口气。”

在工人们看来,哪怕一个小孔蒸汽外泄也能致命,“像针一样,高温可以把身体刺穿。”

据国家安监总局消息,经初步调查分析,事故主要原因是,2号锅炉蒸汽出口处主管道流量计阀门焊缝裂开,大量高温高压蒸汽外溢,导致主控室玻璃破裂,造成主控室人员严重伤亡。事故详细原因正在进一步调查中。

国家电网中国电力科学研究院副总工程师蔡国雄介绍,出现事故的蒸汽管道,是火电厂的标配,一般会将煤炭和煤矸石混合燃烧,当锅炉燃烧完后就会产生蒸汽,再用蒸汽推动蒸汽轮机。锅炉和蒸汽轮机间有一段距离,此次发生事故的就是这一部分输送高温高压蒸汽的管道。

而管道焊接位置在强度上弱于其他部分,出现问题可能存在焊接质量不好,或者是在长期运行中,焊缝处逐渐发生开裂。因此,平日里对焊接处进行检测尤为重要。一般情况下,在焊接后要对焊缝质量进行超声波鉴定,每条焊缝都要确保安全。“一旦瞬间蒸汽流量变大,锅炉压力和温度增高,都可能导致焊缝开裂”。

从空间上看,高温高压瞬间喷出数百摄氏度的蒸汽,将产生巨大的冲击力,“蒸汽本身没有毒性,但温度很高,压力很高,厂房是封闭的,会把建筑物、窗户打碎,人会一下子会被推倒,造成烫伤等情况。实际上,主控室并不需要太多运行人员,但如果当时正在调试,有可能安装和调试人员均在现场,造成较大人员伤亡。”

事故死者善后和伤者救治情况如何?

当阳市人民医院重症监护室门口,伤者黄华林的姐夫姚平彻夜未眠。他介绍,48的黄华林是发电厂的“元老”,10多年前在马店村建厂时就第一批入厂,还派到江西学习管理仪器。

事发当天,黄华林是白班,还有2个多小时就要下班了,然而,事故发生,他的烧伤面积达80%。“全身都是黑的,眼睛睁不开,手上起了泡,腿上缠着纱布,话也说不出来了”。

24岁的罗文是这次事故5名伤者中烧伤最严重的。

他全身九成烧伤,医生告诉家属,罗文目前仍有意识,喊他的名字还有反应,眼能睁开,眼部发肿。

罗文只在发电厂上班两个月,负责照看仪器。此前在化肥厂打过工。据家属介绍,罗文距离爆炸的管道有点距离,所以只是受了伤。

当阳市常务副市长李小军说,事故发生后,宜昌市和当阳市均启动应急预案,当地公安、卫生、医务部门第一时间赶赴现场,消防多次进入事发现场,共发现遇难遗体21具,全部送往殡仪馆。

重案组37号获得的一份此次安全事故受害者名单显示,死者和伤者均为当阳籍,均为马店发电公司职工,均办理了“五险一金”,来自当阳市坝陵办事处、玉阳办事处、王店镇、两河镇等多个乡镇。遇难者中年纪最小者22周岁,目前正通过比对DNA,对遇难者身份进一步核实。8月12日晚探员获悉,遇难者身份全部得到核实。

当阳市卫生计生局局长龚煊介绍,事故发生后,5名伤者被送到当阳市人民医院,其中3人伤势较重,全身90%烧伤,一度出现昏迷休克情况,经武汉同济医院、武汉市三医院、宜昌市医院专家会诊后,生命体征基本稳定。目前相关部门正在调动直升机,将4名伤员转至武汉三医院接受进一步治疗。

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