利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

12 条记录 (耗时 0.011 秒)

    Modelling loss of boiler efficiency due to sootblowing
    4.
    发明公开
    Modelling loss of boiler efficiency due to sootblowing 失效
    建立锅炉效率损失的建模

    公开(公告)号：EP0313687A3

    公开(公告)日：1990-11-14

    申请号：EP87202217.3

    申请日：1984-07-13

    申请人： INTERNATIONAL CONTROL AUTOMATION FINANCE S.A.

    发明人： Scheib, Thomas J. ,  Dziubakowski, Donald J. ,  Klatt, John Henry

    IPC分类号： F22B37/56

    CPC分类号： F22B37/56

    摘要： A method of identifying a parameter of a model for a rate of loss of boiler efficiency due to a sootblowing operation, in a boiler or other convection heat transfer device having a plurality of heat traps, comprises measuring a time since a last sootblowing operation in the heat trap in question, measuring an overall boiler efficiency at the beginning of sootblowing for the heat trap in question, measuring a change in efficiency due to the sootblowing operation and calculating the parameter using an equation. According to the equation, the ratio of efficiency change over overall boiler efficiency equals the time factor since the last sootblowing operation times the parameter minus a summation of factors for each of the other heat traps and their associated sootblowing operations.

    Process control systems and methods
    5.
    发明公开
    Process control systems and methods 失效
    过程控制系统和方法

    公开(公告)号：EP0263616A3

    公开(公告)日：1989-07-05

    申请号：EP87308370.3

    申请日：1987-09-22

    申请人： INTERNATIONAL CONTROL AUTOMATION FINANCE S.A.

    发明人： Lane, John David ,  Scheib, Thomas J.

    IPC分类号： G05B13/04

    CPC分类号： G05B13/044

    摘要： A self-tuning system for controlling a process (10) based on a measured parameter comprises a modular parameter estimator (12) and parameter conversion/controller arrangements (14, 18; 20, 24, 28; 30, 34) which are used in conjunction with the process and which receive as an input the measured parameter. An IMC (internal model controller) arrangement is used for one of the parameter converter/controller arrangements (20, 24, 28) and incorporates a feed forward index which is used for gain scheduling. Regression analysis is also used in conjunction with the conventional gain scheduling to more accurate refine the control action. A limiter is also used in conjunction with the regression analysis to avoid an overly high or overly low correction signal for the controller.

    Boiler steam temperature controller
    6.
    发明公开
    Boiler steam temperature controller 失效
    防潮剂防腐剂。

    公开(公告)号：EP0285297A2

    公开(公告)日：1988-10-05

    申请号：EP88302426.7

    申请日：1988-03-18

    申请人： INTERNATIONAL CONTROL AUTOMATION FINANCE S.A.

    发明人： Matsko, Theodore N. ,  Rand, Robert S. ,  Russell, Thomas D. ,  Scheib, Thomas J. ,  Walker, Robert R.

    IPC分类号： F22G5/00

    CPC分类号： F22G5/12

    摘要： A system for controlling steam temperature in a boiler uses a time delay feedback controller known as a Smith Predictor to provide control tuning of true boiler parameters which change with load. More specifically, a feedforward predictor (38) presets an expected secondary superheater inlet temperature with a boiler load, the expected temperature is corrected for firing rate deviation, air flow deviation and reheat temperature control by respective modifiers (42, 44 and 46), a final correction is effected by a feedback controller (50), and a cascade controller (48) responds to the inlet temperature to provide rapid process loop response to predictable intermediate process control points.

    摘要翻译： 用于控制锅炉蒸汽温度的系统使用称为史密斯预测器的时间延迟反馈控制器来提供随负载变化的真实锅炉参数的控制调节。 更具体地说，前馈预测器（38）利用锅炉负载预设预期的次级过热器入口温度，通过相应的改进器（42,44和46）校正燃烧速率偏差，气流偏差和再热温度控制的预期温度， 最终校正由反馈控制器（50）实现，并且级联控制器（48）响应入口温度以向可预测的中间过程控制点提供快速的过程回路响应。

    Titration curve estimation for adaptive pH control
    7.
    发明公开
    Titration curve estimation for adaptive pH control 失效
    自适应pH控制的滴定曲线估计

    公开(公告)号：EP0457989A1

    公开(公告)日：1991-11-27

    申请号：EP90312628.2

    申请日：1990-11-20

    申请人： INTERNATIONAL CONTROL AUTOMATION FINANCE S.A.

    发明人： Gulaian, Martin ,  Lane, John David ,  Loparo, Kenneth ,  Scheib, Thomas J.

    IPC分类号： G01N31/16

    CPC分类号： G01N31/164 ,  G01N31/166 ,  Y10T436/117497

    摘要： A method of estimating pH titration curves, for use in the adaptive control of pH in a process, comprises gathering data points which each represent the ratio between a reagent added to the process and a flowrate to the process at a measured pH, storing the data points in a bin system according to the measured pH, and using the stored data points to create a model of the titration curve for use in controlling the addition of reagent. Older points are replaced by newer points during the process continuously to update the model. The model is used to generate a gain schedule for operating a PI controller (16) which controls the addition of reagent to the process.

    摘要翻译： 用于在过程中对pH进行自适应控制的估计pH滴定曲线的方法包括收集数据点，所述数据点各自表示在测量的pH下加入到过程中的试剂与过程的流量之间的比率， 根据测量的pH值指向仓系统，并使用存储的数据点创建用于控制试剂添加的滴定曲线模型。 在过程中不断更新旧点以更新模型。 该模型用于生成增益计划，用于操作PI控制器（16），该控制器控制向过程添加试剂。

    Boiler steam temperature controller
    8.
    发明公开
    Boiler steam temperature controller 失效
    蒸汽温度控制

    公开(公告)号：EP0285297A3

    公开(公告)日：1990-03-07

    申请号：EP88302426.7

    申请日：1988-03-18

    申请人： INTERNATIONAL CONTROL AUTOMATION FINANCE S.A.

    发明人： Matsko, Theodore N. ,  Rand, Robert S. ,  Russell, Thomas D. ,  Scheib, Thomas J. ,  Walker, Robert R.

    IPC分类号： F22G5/00

    CPC分类号： F22G5/12

    摘要： A system for controlling steam temperature in a boiler uses a time delay feedback controller known as a Smith Predictor to provide control tuning of true boiler parameters which change with load. More specifically, a feedforward predictor (38) presets an expected secondary superheater inlet temperature with a boiler load, the expected temperature is corrected for firing rate deviation, air flow deviation and reheat temperature control by respective modifiers (42, 44 and 46), a final correction is effected by a feedback controller (50), and a cascade controller (48) responds to the inlet temperature to provide rapid process loop response to predictable intermediate process control points.

    Process control systems and methods
    9.
    发明公开
    Process control systems and methods 失效
    Systeme und Verfahren zur Prozessregelung。

    公开(公告)号：EP0263616A2

    公开(公告)日：1988-04-13

    申请号：EP87308370.3

    申请日：1987-09-22

    申请人： INTERNATIONAL CONTROL AUTOMATION FINANCE S.A.

    发明人： Lane, John David ,  Scheib, Thomas J.

    IPC分类号： G05B13/04

    CPC分类号： G05B13/044

    摘要： A self-tuning system for controlling a process (10) based on a measured parameter comprises a modular parameter estimator (12) and parameter conversion/controller arrangements (14, 18; 20, 24, 28; 30, 34) which are used in conjunction with the process and which receive as an input the measured parameter. An IMC (internal model controller) arrangement is used for one of the parameter converter/controller arrangements (20, 24, 28) and incorporates a feed forward index which is used for gain scheduling. Regression analysis is also used in conjunction with the conventional gain scheduling to more accurate refine the control action. A limiter is also used in conjunction with the regression analysis to avoid an overly high or overly low correction signal for the controller.

    摘要翻译： 用于基于测量参数来控制过程（10）的自整定系统包括模块化参数估计器（12）和参数转换/控制器布置（14,18; 20,24,28; 30,34），其用于 与过程结合，并将其作为输入接收测量参数。 对于参数转换器/控制器布置（20,24,28）中的一个使用IMC（内部模型控制器）布置，并且包括用于增益调度的前馈索引。 回归分析也与常规增益调度结合使用，以更准确地改进控制动作。 限制器也与回归分析结合使用，以避免控制器过高或过低的校正信号。