产地:xrda0907 |
一、前语 宝钢二期烧结工程主排风机设备1991年投入工作。主排风系统由2台21000m3/min风量,17.64kPa (1800mmWG)静压差的双吸入离心式风机机组组成,主拖动电机为2×7800kW,10kV无刷励磁同步电动机,2台电机共用一套3.4MVA变频软起动设备起动。该设备1991年投产以来,毛病较多,发动成功率低。其主要原因是设备计划容量偏小,系统老化,参数漂移。跟着宝钢出产节奏的进一步加快,对烧结矿出产的恳求越来越高,为保证烧结出产的安稳工作,依据2DL主排风机起动设备及励磁设备的实习现状,对其进行整体改造确实势在必行。 二、改造规划简述 本改造项目不触及主排风机本体及油泵、风门等辅机设备。对如今运用状况尚好的为辅机及辅佐设备供电、控制效力的MCC柜以及有关二烧结主控制系统的远程I/O柜予以保留运用。 关于10kV的高压开关,保留,能源部设置的辅佐继电器、原有中继端子柜也予以保留。 高压变频设备、励磁柜、操作监控柜拟引进设备,对其进行整体更换。与变频设备配套的输入、输出变压器则由外商供应具体技术参数及制造恳求,由宝钢方面择优从国内制造厂订货,变压器选用油浸式变压器。 考虑到本改造项目新上一套主排风机起动设备及励磁系统,并且在新系统设备调试好曾经,老系统还要能工作运用,恳求新系统电机空载或带风机负荷调试只能运用2DL年修的七天左右时间结束。当新系统调试过程中出现疑问,不能准时,还需老系统作为后备,保持2DL的正常出产。 新起动系统10kV工作总线的两路旁路开关到二台同步电动机的馈电,接至老系统工作总线下的两路旁路开关,主排风机室电动机那段电缆仍用旧有电缆。新老系统试车或工作需重接高压柜的高压电缆进行彼此切换。 原有老系统的励磁柜、操作监控盘撤消后,不再恢复。而新装的本次引进系统之励磁柜及操作、控制、监视盘行将统筹新老系统,这部分设备做成与新老系统兼容且具双向切换功用。 |
五、设备特征
本高压变频器作为软起动器可以接连起动,起动时间小于200秒,起动电流不逾越电机的额定电流。该产品特征为:
可靠性高。该产品选用6500V,1500A的高压SGCT器件,器件数量少,耐压及电流裕量大,变频电流小,器件开关损耗少,设备可靠。
输入波形好。变频整流器选用多脉冲方法(18脉冲),整体谐波畸变THD小于5%,直接满意IEEE519-1992及国标的谐波克制规范。
输出波形好。无需添加任何选项,PWM电流型变频器直接输出的正弦波形,不存在转矩脉动,无潜在共振疑问。逆变时无dv/dt及di/dt的发生,谐波畸变THD小于5%,联接变频器及电机之间的距离可长达15km。
起动性能好。PowerFlex7000选用直接矢量控制技术,本方案选用无编码器的矢量控制,转子的方位可直接查看,起动力矩为95%额定起动转矩。
运用简略。人机接口为大屏幕液晶闪现操作员终端。变频器的状况,输入输出变量,自确诊效果,毛病报警等信息均可显如今屏幕上。
维护便当。高集成度的SGCT器件及PowerCage机架的运用提高了系统模块化程度,然后保证了功率模块的更换时间小于5分钟。
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MEMBREX REPLACEMENT CENTRIFUGE MOTOR MODEL BENCHMARK GX
DAGE MTI CAMERA NC-68L
NEW BETZ EVAPORATION TUBE 20 C ML
STATE INDUSTRIAL METERING PUMP 120 VAC .35 AMP.63 GPH M仲鑫达
CORNING SLOW SPEED 4 x 1L MAGNETIC STIRRER WITH CONTROL仲鑫达
NEW WATSON MARLOW PERISTALTIC PUMP 503S
NEW COLE PARMER HIGH PH DOUBLE JUNCTION PH ELECTRODE 10仲鑫达
NEW BIO-CHEM VALVE 080T6-S45 FLOW SELECTION MANIFOLD V仲鑫达