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公开(公告)号：US5231837A
公开(公告)日：1993-08-03
申请号：US775581
申请日：1991-10-15
申请人： Bao Ha
发明人： Bao Ha
IPC分类号： F02C20060101 , F02C6/10 , F02C6/18 , F22B20060101 , F22B1/18 , F25J20060101 , F25J3/02 , F25J3/04
CPC分类号： F25J3/046 , F02C6/10 , F25J3/04303 , F25J3/04448 , F25J3/04575 , F25J3/04606 , F25J3/04872 , F25J2200/20 , F25J2200/50 , F25J2200/54 , F25J2215/50 , Y10S62/915 , Y10S62/939
摘要： A cryogenic distillation process for the production of oxygen and nitrogen is provided, which entails:a) providing a feed stream of clean, dry and compressed air,b) cooling at least a fraction of the compressed air and introducing the same into a high pressure column, and separating the same into nitrogen-rich stream at the top of the column and an oxygen-rich stream at the bottom of the column, wherein the overhead of the high pressure column exchanges heat with both the bottom of the low pressure column and the bottom of an intermediate column,c) introducing at least a fraction of the oxygen-rich stream into the intermediate column to afford a top liquid fraction A and a bottom liquid fraction B, the overhead of the intermediate column exchanging heat with the low pressure column at a location above the bottom reboiler of the low pressure column, wherein the pressure of the intermediate column is lower than the high pressure column but higher than the low pressure column,d) introducing at least a fraction of the liquid fractions A and B into the low pressure column as feed,e) feeding at least a fraction of the nitrogen-rich stream of step b) to the low pressure column as reflux, andf) recovering an oxygen-rich stream product at the bottom of the low pressure column and a low pressure nitrogen- rich stream at the top of the low pressure which further comprises recovering a medium pressure nitrogen stream column.
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2.发明授权
公开(公告)号：US4280060A
公开(公告)日：1981-07-21
申请号：US157348
申请日：1980-06-09
IPC分类号： F01D17/24 , F01D15/00 , F01D17/00 , F01D17/02 , F01D19/00 , F01D21/00 , F01D25/26 , F01K7/38 , F01K13/00 , F01K13/02 , F22B20060101 , G05B13/00 , G05B13/02 , G05B15/00 , G05B19/00 , G09B15/00 , H02P9/04
CPC分类号： F01D17/24 , F01D17/26 , F01K13/02 , F02G2250/12 , F05D2220/31
摘要： A dedicated supervisory control system for a steam turbine-generator comprising a hierarchy of microcomputer subsystems interactive with a conventional analog electrohydraulic control system to provide control and monitoring capabilities during all operating phases of the turbine-generator. The separate microcomputer subsystems are programmed for coordinated interaction and communication through shared, dual-port read/write memory units and each microcomputer subsystem is programmed and configured to handle a separate group of control responsibilities in a distributed control system. The microcomputer hierarchy includes an input and calculations computer having means for interfacing with analog input data sources and sensors which report on various operating parameters of the turbine-generator and from which thermal and mechanical stress and other derived quantities are calculated; a display and communications computer adapted to interface with a plant computer and with an operator control panel and other display and readout devices whereby operating personnel may interact with the control system; and a control computer, standing at the top of the hierarchy, for receiving information from the other computers, for making decisions based on that information and, through input/output ports, for providing the electrohydraulic control system with directions for optimal control of the turbine-generator within its thermal and mechanical limitations. The dedicated supervisory controller provides a plurality of operating modes.
摘要翻译： 一种用于蒸汽涡轮发电机的专用监控系统，包括与常规模拟电液控制系统交互的微机子系统的层级，以在涡轮发电机的所有运行阶段提供控制和监测能力。 单独的微计算机子系统被编程为通过共享的双端口读/写存储器单元进行协调的交互和通信，并且每个微机子系统被编程和配置为在分布式控制系统中处理单独的一组控制责任。 微机层级包括输入和计算计算机，其具有用于与模拟输入数据源进行接口的装置和报告涡轮发电机的各种运行参数的传感器，并计算出热和机械应力和其他导出量; 显示和通信计算机，其适于与工厂计算机以及操作员控制面板和其他显示和读出装置接口，由此操作人员可与控制系统相互作用; 以及位于层次结构顶部的控制计算机，用于从其他计算机接收信息，用于基于该信息做出决定，并且通过输入/输出端口为电液控制系统提供用于涡轮机的最佳控制的方向 - 发电机在其热和机械限制下。 专用监控控制器提供多种操作模式。
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公开(公告)号：US3570458A
公开(公告)日：1971-03-16
申请号：US3570458D
申请日：1969-05-09
发明人： SATO TAKEHIKO , KONDO TAKAO , OMORI TOSHIJI , ITO HISAO , TERAO MASARU
CPC分类号： F28D7/024 , F22B1/1884 , F22B9/04 , F22B25/00
摘要： A heat exchanger such as a boiler comprises a liquid section having a wall with a plurality of sleeve pipes extending therethrough. The fire tubes for conducting high-temperature gases extend through the respective sleeve pipes and upwardly in the liquid section without being directly coupled to the wall of the liquid section. The fire tubes extend in the form of a gentle curve such as a spiral through the liquid section and extend outwardly through an upper wall of the liquid section through respective additional sleeve elements and connect at their upper ends into an outlet gas chamber. Liquid is circulated by natural circulation from the liquid section through an exterior duct to the hollow sleeve elements and around the fire tubes and back upwardly into the liquid section. The gently curved form of the fire tubes inside the liquid section and their free mounting at their passage through the sleeve elements provides a construction which is capable of withstanding the high thermal stresses which are present in such boilers.
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