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31. 发明授权

US4360882A Process control system 失效
标题翻译：过程控制系统
公开(公告)号：US4360882A
公开(公告)日：1982-11-23
申请号：US181912
申请日：1980-08-27
申请人： William S. Stewart , Gary L. Funk
发明人： William S. Stewart , Gary L. Funk
IPC分类号： F01D17/24 , G05B15/00 , F01D17/02
CPC分类号： F01D17/24
摘要： In a process in which both a turbine or motor and an expander are utilized to drive a compressor, the use of the expander is substantially maximized while still insuring that the driving force applied to the turbine or motor does not go below a low limit. A variable limit is also utilized to prevent a stuck valve from being overdriven by a controller.
摘要翻译：在利用涡轮或电动机和膨胀机来驱动压缩机的过程中，扩大器的使用基本上最大化，同时仍然确保施加到涡轮机或电动机的驱动力不低于低限。还可以使用可变极限来防止卡住的阀被控制器过度驱动。

32. 发明授权

US4281970A Turbo-expander control 失效
标题翻译：涡轮膨胀机控制
公开(公告)号：US4281970A
公开(公告)日：1981-08-04
申请号：US48930
申请日：1979-06-15
申请人： William S. Stewart , Virgil R. Spurgeon
发明人： William S. Stewart , Virgil R. Spurgeon
IPC分类号： F02C6/10 , F02C9/16 , F25J3/02 , F25J3/04 , F04B49/00
CPC分类号： F02C6/10 , F02C9/16 , F25J1/0288 , F25J1/0294 , F25J1/0298 , F25J3/0295 , F25J3/04115 , F25J3/04381 , F25J3/04781 , F25J3/04957 , F25J2230/20 , F25J2230/24 , F25J2240/02 , F25J2240/40 , F25J2280/02
摘要： In a process in which a turbo-expander is utilized to drive a compressor, the pressure of the gas flowing to the turbo-expander is maintained at a desired level by manipulating the speed of the turbo-expander. If the turbo-expander should tend to overspeed, the discharge output of the compressor is recycled to the suction inlet of the compressor to thereby increase the loading on the compressor which will result in a reduced turbine speed. More gas can then be fed through the turbo-expander which will maintain the desired pressure. If the pressure of the gas flowing to the turbo-expander should continue to increase, a bypass valve is utilized to bypass the turbo-expander to thereby maintain a desired pressure of the gas flowing to the turbo-expander.
摘要翻译：在利用涡轮膨胀机来驱动压缩机的过程中，流经涡轮膨胀机的气体的压力通过操纵涡轮膨胀机的速度而保持在期望的水平。如果涡轮膨胀机倾向于超速，则压缩机的排放输出再循环到压缩机的吸入口，从而增加压缩机上的负载，这将导致涡轮转速降低。然后可以将更多的气体通过涡轮膨胀机进入，这将保持所需的压力。如果流向涡轮膨胀机的气体的压力应该继续增加，则利用旁通阀绕过涡轮膨胀机，从而保持气体流向涡轮膨胀机的所需压力。

33. 发明授权

US4252614A Control of multiple feed fractional distillation column 失效
$Control of multiple feed fractional distillation column$
标题翻译：多级进料分馏塔的控制
公开(公告)号：US4252614A
公开(公告)日：1981-02-24
申请号：US024337
申请日：1979-03-27
申请人： William S. Stewart
发明人： William S. Stewart
IPC分类号： B01D3/42
CPC分类号： B01D3/4255 , Y10S203/09 , Y10S203/20
摘要： A control system for a multiple feed fractional distillation column is disclosed in which the flow rate signals of the multiple feed streams are delayed and combined for use in feedforward predictive control of the upper reflux flow, intermediate reflux flow and/or reboiler fluid flow to the fractional distillation column. Temperature measurements of the upper vapor stream, the upper reflux stream, the intermediate vapor stream and the intermediate reflux stream as well as analysis of a product stream can be utilized to provide feedback control of the fractional distillation column.
摘要翻译：公开了一种用于多进料分馏塔的控制系统，其中多个进料流的流速信号被延迟和组合，以用于前回流，中等回流和/或再沸器流体的前馈预测控制分馏塔。可以利用上蒸气流，上回流，中间蒸汽流和中间回流的温度测量以及产物流的分析来提供分馏塔的反馈控制。

34. 发明授权

US4230534A Control of a fractional distillation column 失效
$Control of a fractional distillation column$
标题翻译：控制分馏塔
公开(公告)号：US4230534A
公开(公告)日：1980-10-28
申请号：US23353
申请日：1979-03-23
申请人： William S. Stewart
发明人： William S. Stewart
IPC分类号： B01D3/42
CPC分类号： B01D3/425 , Y10S203/08 , Y10S203/17 , Y10S203/19
摘要： A control system is provided for a fractional distillation column where at least a portion of the overhead vapor stream from the fractional distillation column is utilized in a refrigeration and heating system for a process with which the fractional distillation column is associated. The liquid level is an overhead accumulator associated with the fractional distillation column is maintained at a level sufficient to insure that a sufficient supply of the overhead vapor stream from the fractional distillation column is available to supply the refrigeration and heating needs of the process with which the fractional distillation column is associated. Feedforward control based on the flow rate of the feed stream to the fractional distillation column and an analysis of the feed stream flowing to the fractional distillation column is utilized to maintain the desired liquid level in the overhead accumulator associated with the fractional distillation column even where fluctuations occur in the flow rate of the feed stream being provided to the fractional distillation column.
摘要翻译：提供了一种用于分馏塔的控制系统，其中来自分馏塔的至少一部分塔顶蒸气流用于与分馏塔相关联的方法的制冷和加热系统中。液位是与分馏塔相关联的塔顶储存器保持在足以确保来自分馏塔的塔顶蒸馏物流的足够供应可用于提供制冷和加热需要的过程的水平，分馏塔相关联。使用基于进入分馏塔的进料流的流速的前馈控制和流入分馏塔的进料流的分析来维持与分馏塔相关的塔顶储液罐中所需的液位，即使在波动发生在提供给分馏塔的进料流的流速中。

35. 发明授权

US4115862A Process control method and apparatus 失效
标题翻译：过程控制方法和装置
公开(公告)号：US4115862A
公开(公告)日：1978-09-19
申请号：US808000
申请日：1977-06-20
申请人： William S. Stewart
发明人： William S. Stewart
IPC分类号： G06G7/58 , F23N1/00
CPC分类号： G06G7/58
摘要： A method and apparatus is provided for controlling the operation of a reforming furnace used to decompose at least a portion of a feed stream. A by-product fuel from subsequent process steps, which is a result of decomposition of the feed in the furnace, is used as one fuel source to fire the furnace. The control system monitors the byproduct fuel stream and the feed stream to a decomposition side of the furnace and determines the feed rate of additional fuel required to fire the furnace, which feed rate is correspondingly controlled. The control system includes means for determining various selected variables as sensed by suitable analyzers and flow rate meters and comparing certain variables to determine the flow rate of the additional fuel required to fire the furnace.
摘要翻译：提供了一种用于控制用于分解进料流的至少一部分的重整炉的操作的方法和装置。来自后续处理步骤的副产物燃料被用作燃烧炉的一个燃料源，其是炉中的进料分解的结果。控制系统监测副产物燃料流和进料流到炉的分解侧，并确定燃烧炉所需的附加燃料的进料速率，该进料速率被相应地控制。控制系统包括用于确定由合适的分析仪和流量计所检测的各种选定变量的装置，并比较某些变量以确定燃烧炉所需的附加燃料的流量。

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