Chemical Processing

Multimedia

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  • Video: Integral Tracking for the Hot Air Dampers

    Should a hot air damper be driven either fully open or fully closed, integral tracking must be activated in either the hot air pressure controller or the bag house inlet temperature controller. The issues are similar to those for output tracking presented in a previous video.

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/21/2015

  • Video: Integral Tracking for the Hot Air Temperature Controller

    For a PID controller to perform as expected, changes in the controller output must lead to changes in the opening of one or more final control elements, which must affect the measured variable for the PID controller. Driving a final control element to either limit disrupts this sequence. This requires integral tracking, not output tracking. If the final control element has been driven fully open, control actions to increase the opening cannot be implemented, but control actions to decrease the opening can be. The opposite is true if the final control element is driven fully closed.

     

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/21/2015

  • Video: Output Tracking for the Hot Air Dampers

    Previous videos examined output tracking for the scrubber duct inlet temperature controller and the hot air temperature controller. This video examines output tracking for the hot air pressure controller and the bag house inlet temperature controller.

     

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/21/2015

  • Video: Output Tracking for the Hot Air Temperature Controller

    This video examines output tracking for the hot air temperature controller. The hot air temperature controller outputs to a summer whose output is the fresh air damper opening.

     

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/18/2015

  • Video: Using Output Tracking for Bumpless Transfer from Manual to Automatic

    Tracking comes in two versions – output tracking and integral tracking. Output tracking provides smooth transitions from manual operations to automatic operations. Integral tracking prevents reset windup. Output tracking is the subject of this video.

     

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/18/2015

  • Video: Providing Capability for Manual Control

    In process applications the operator must be able to assume control of any final control element and specify its opening. This video examines the mechanisms for providing this capability.

     

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/18/2015

  • Video: Analysis of Performance of Alternate Control Configuration

    The critical variables are the scrubber duct inlet temperature and the bag house inlet temperature. Both must remain above the dew point at all times. This video examines how these two loops affect each other.

     

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/17/2015

  • Video: Commissioning the Alternate Control Configuration

    The loops proposed in the previous video complete the alternate control configuration. A previous video also examined tuning the feedback trim controller for the hot air temperature. This video will tune the other three loops. The first issue is the order for tuning the loops.

     

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/17/2015

  • Video: Controls for Hot Air Dampers in Alternate Control Configuration

    This video proposes controls for the hot air pressure and the bag house inlet temperature. Interaction is a major concern. Opening either hot air damper decreases the hot air pressure. Opening the hot air damper to bag house inlet increases the bag house inlet temperature. Opening the hot air damper to scrubber duct inlet alters the distribution of hot air so as to decrease the bag house inlet temperature.

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/17/2015

  • Video: Commissioning the Ratio Controls for Fresh Air and Fuel Flow

    Video: Commissioning the Ratio Controls for Fresh Air and Fuel Flow
    The subject of this video is commissioning the ratio configuration that uses the characterization function.

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/17/2015

  • Video: Configuration Issues for PID Blocks in Alternate Control Configuration

    When blocks such as summers, selectors, etc., are inserted between the output of the PID block and the final control element, some configuration issues must be addressed for the PID block.

     

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/17/2015

  • Video: Characterization Function for Implementing Ratio Control

    The control configuration proposed in the previous video included a characterization function whose purpose can be stated as follows: Given a value for the fuel gas valve opening, determine the fresh air damper opening required to give a hot air temperature of 210°C. The focus of this video is obtaining data points for this characterization function.

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/09/2015

  • Video: Ratioing Fresh Air and Fuel Flow to Furnace

    The scrubber duct inlet temperature controller adjusts the opening of the fuel gas valve. Opening only the fuel gas valve affects the hot air temperature. To increase the heat input at a constant hot air temperature, both the fuel gas valve and the fresh air damper must open. This video presents a ratio control configuration that enables the scrubber duct inlet temperature controller to simultaneously change the openings of the fuel gas valve and the fresh air damper, the objective being to minimize the effect on the hot air temperature.

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/09/2015

  • Video: Alternate Control Configuration for Off-Gas Process

    The temperature of the hot air is determined by the opening of the fuel gas valve and the opening of the fresh air damper. Based on the process understanding from previous videos, this video proposes alternate control logic for these two final control elements.

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/09/2015

  • Video: Interaction in the Single-Loop Configuration

    This video examines the degree of interaction between the scrubber duct inlet temperature loop and the remaining loops in the single-loop configuration.

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net. He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. http://www.chemicalprocessing.com/experts/instrumentation-control/

    Cecil Smith, president of Cecil L. Smith, Inc.
    09/09/2015

  • Video: Tuning the Hot Air Loops

    This video examines the tuning of the hot air pressure and hot air temperature controllers. The loops will be tuned in the sequence suggested in the previous video but not as part of plant start-up. Instead, the process is operating and each controller has been previously tuned. The objective is to assess how well each loop is tuned, and make adjustments if appropriate.

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Baton Rouge, La., a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including "Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net.

    He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. 

    Cecil Smith, president of Cecil L. Smith, Inc.
    08/27/2015

  • Video: Single-Loop Control Configuration For Off-Gas Process

    This video presents the single-loop control configuration for the off-gas process. The configuration consists of four loops that must be tuned one at a time. A sequence will be proposed for tuning the loops, but the actual tuning will be the subject of subsequent videos.

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Baton Rouge, La., a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including "Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net.

    He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. 

    Cecil Smith, president of Cecil L. Smith, Inc.
    08/27/2015

  • Video: Introduction Of Off-Gas Process

    The off-gas process is an excellent example of a multivariable process control application. The focus must be on the control issues, not complex process technology that is likely to be proprietary. The simplicity of the off-gas process fits these requirements. The process involves heating air and mixing air streams of different temperatures. But even for simple processes, issues can arise regarding the performance of the process controls.

    To access the entire video series from Cecil Smith, visit our video page.

    Cecil Smith is president of Cecil L. Smith, Inc., Baton Rouge, La., a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including "Digital Control of Industrial Processes and more than 100 articles. You can email him at cecilsmith@cox.net.

    He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here. 

    Cecil Smith, president of Cecil L. Smith, Inc.
    08/27/2015

  • Minute Clinic: Reduce Emergency Procedures

    In this episode of the Minute Clinic, we talk about how you can reduce emergency procedures by 90%. Dave Strobhar -- founder and principal-human-factors engineer for Beville Engineering – offers his expertise. Dave is also the founder of the Center for Operator Performance.

    The main way to achieve reduction is to condense content. He notes that in a study done with Penn State University, if you look at 40-pages of procedures, there are only four pages of procedures that are unique. This helps in terms of updating procedures – making it a less-daunting task. Listen for more insight from Strobhar.

    Click to listen to this podcast now! run time is 4:35

    Your browser will provide the player for this podcast. Enjoy.

    Traci Purdum, Senior Digitial Editor
    07/06/2015
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