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首页> 外文期刊>Thermal engineering >Substantiation of the Cogeneration Turbine Unit Selection for Reconstruction of Power Units with a T-250/300-23.5 Turbine
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Substantiation of the Cogeneration Turbine Unit Selection for Reconstruction of Power Units with a T-250/300-23.5 Turbine

机译：用T-250 / 300-23.5涡轮机改造热电联产涡轮机机组以证实其动力装置

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The selection of a cogeneration steam turbine unit (STU) for the reconstruction of power units with a T-250/300-23.5 turbine is substantiated by the example of power unit no. 9 at the cogeneration power station no. 22 (TETs-22) of Mosenergo Company. Series T-250 steam turbines have been developed for combined heat and power generation. A total of 31 turbines were manufactured. By the end of 2015, the total operation time of prototype power units with the T-250/300-23.5 turbine exceeded 290000 hours. Considering the expiry of the service life, the decision was made that the reconstruction of the power unit at st. no. 9 of TETs-22 should be the first priority. The main issues that arose in developing this project-the customer's requirements and the request for the reconstruction, the view on certain problems of Ural Turbine Works (UTZ) as the manufacturer of the main power unit equipment, and the opinions of other project parties-are examined. The decisions were made with account taken of the experience in operation of all Series T-250 turbines and the results of long-term discussions of pressing problems at scientific and technical councils, meetings, and negotiations. For the new power unit, the following parameters have been set: a live steam pressure of 23.5 M Pa and live steam/reheat temperature of 565/565℃. Considering that the boiler equipment will be upgraded, the live steam flow is increased up to 1030 t/h. The reconstruction activities involving the replacement of the existing turbine with a new one will yield a service life of 250000 hours for turbine parts exposed to a temperature of 450°C or higher and 200000 hours for pipeline components. Hence, the decision has been made to reuse the arrangement of the existing turbine: a four-cylinder turbine unit comprising a high-pressure cylinder (HPC), two intermediate pressure cylinders (IPC-1 & 2), and a low-pressure cylinder (LPC). The flow path in the new turbine will have active blading in LPC and IPC-1. The information is also presented on the use of the existing foundations, the fact that the overall dimensions of the turbine unit compartment are not changed, the selection of the new turbine type, and the solutions adopted on the basis of this information as to LPC blading, steam admission type, issues associated with thermal displacements, etc.
机译：选用T-250 / 300-23.5汽轮机改造热电联产汽轮机（STU）的示例由第6汽轮机实例证明。 9号热电联产电站Mosenergo公司的22（TETs-22）。 T-250系列蒸汽轮机已经开发用于热电联产。总共制造了31台涡轮机。到2015年底，带有T-250 / 300-23.5涡轮机的原型动力装置的总运行时间超过290000小时。考虑到使用寿命的终止，决定对动力装置进行重新设计。没有。 TETs-22的9应该是第一要务。在开发该项目时出现的主要问题-客户的要求和重建要求，对作为主要动力设备制造商的乌拉尔涡轮工程（UTZ）的某些问题的看法以及其他项目各方的意见-被检查。做出这些决定时要考虑到所有T-250系列涡轮机的运行经验以及在科学技术理事会，会议和谈判中就紧迫问题进行的长期讨论的结果。对于新的动力装置，已设置以下参数：蒸汽压力为23.5 M Pa，蒸汽/再热温度为565/565℃。考虑到将升级锅炉设备，新鲜蒸汽流量增加到1030吨/小时。涉及用新涡轮机替换现有涡轮机的重建活动将使暴露于450°C或更高温度下的涡轮机零件的使用寿命为250000小时，而管道部件的使用寿命为200000小时。因此，已决定重新使用现有涡轮机的布置：四缸涡轮机单元，包括高压缸（HPC），两个中压缸（IPC-1和2）和低压缸（LPC）。新涡轮机的流路将在LPC和IPC-1中具有主动叶片。还介绍了有关使用现有基础的信息，未更改涡轮机单元隔室的整体尺寸，选择新的涡轮机类型以及基于此信息针对LPC叶片采用的解决方案的信息。 ，蒸汽进入类型，与热位移相关的问题等。

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