process control Articles
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Real-time statistical process control of aqueous cleaning systems through in-situ monitoring
Abstract Traditional off-line part cleanliness analysis is too slow for use as a process control tool. These tests, traditionally performed in a laboratory on a small number of representative part samples, are extremely time-consuming. Parts are already integrated into finished product before contamination data are available. Any problems identified at this point require product recall or rework ...
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Integrated process control for recirculating cooling water treatment in the coal chemical industry
This work focused on the integrated process of the recirculating cooling water (RCW) treatment to achieve approximate zero emission in the coal chemical industry. The benefits of fractional and comprehensive RCW treatment were quantified and qualified by using a water and mass balance approach. Limits of cycle of concentrations and some encountered bottlenecks were used to ascertain set target ...
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Deployment of biokinetic modeling tools to optimize real time biological wastewater process control in the oil refining industry
Perhaps no industry has more operationally failing wastewater treatment plants than those deployed in the Oil & Petrochemical market segments. These plants have some of the toughest influent contaminant profiles to treat, and suffer from some of the largest ranges of variation in contaminant loadings. The toughest area of wastewater process control in Oil Refining of course lies in the Biological ...
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Business excellence and governance: the drive for integration
World class corporate governance is becoming a stakeholder imperative. There is a pressure for best practice governance to be a key success factor for organisations' long term survival. This paper seeks to find alignments between corporate governance and quality management. The governance emphasis on structural innovation, growth in organisational values and stakeholder perspectives is compared ...
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Airnet® OPC Set Up Guide
Abstract Airnet® OPC provides data via an OPC Server. The server supports OPC Data Access Custom Interface Standard 2.05a. Information on the OPC specifications and standards can be found at http://www.opcfoundation.org/. These specifications and standards are essential for understanding how to use OPC. OPC (OLE for Process Control) is an industry standard created with the collaboration of ...
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pH of Pure and Ultrapure Water
Measuring pH properly in pure and ultrapure water is difficult. pH is critical for process control and for preventing corrosion for example. ...
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2-day Sensor and Control Workshop at DC Water - Case Study
DC Water is continuously looking into improving process efficiencies of the Blue Plains plant. A key part of DC Water’s improvement plan is an extensive research and development program including several pilot plants. On the operations side, upgrades of the process control strategies are foreseen. Both the research program and the operations upgrades will have to rely on accurate and robust ...
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How Does an Electric Valve Actuator Work?
Electric valve actuators control the opening and closing of valves. They can provide either linear or rotary motion and work with different types of valves, including ball and butterfly valves. Electric valve actuators respond to prompts through remote control or centralized process control systems, which make them invaluable for managing systems that are hard to reach or spread across a large ...
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Singer valve solves triple dilema in Ohio - Case Study
Their Challenge Butler County, which purchases water wholesale to provide drinking water to its population of 100,000, faced three problems. 1. Extreme pressure drops at a pressure reducing and metering facility, resulting in severe cavitation damage and extreme noise to two valves. 2. The inability to sequence the two valves. 3. The inability to accurately control levels in two remote storage ...
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The Application of a Laser Based Open-Path Spectrometer for the Measurement of Fugitive Emissions and Process Control.
ABSTRACT In this paper examples of field operations are presented explaining the application of a new laser based spectrometer and incorporating real-time dispersion modeling techniques to measure fugitive emissions from land fills, gas processing facilities, chemical plants, aluminium smelters, etc. Whilst open-path FTIR spectrometers can measure a variety of gases, they suffer from the ...
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Scaled critical factor index for optimal resource allocation in service and lean construction
Service and construction require large resource, thus there is a need for a comprehensive method for optimal resource allocation. The purpose of this study is to develop and use scaled critical factor index (SCFI) for sustainable resource allocations in a service provision company and a lean construction project. In this research, 160 questionnaires were distributed and the response rate was 48%. ...
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Food Processing: Odor Control in Edible Oil Processing
Abstract: The problems with odor around a typical edible oil deodorizer are discussed in detail, and a three-step solution to eliminate these problems is presented. The three steps are a distillate recovery system which recovers most of the fatty acid in the deodorizer vapor discharge as a valuable byproduct, a closed loop barometric cooling water system which keeps the fatladen hotwell water out ...
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Capacitance Technologies have a real sense for the environment
In the world of technology stars, capacitance has been type-casted. For over 100 years, capacitance has performed in countless applications for industrial control and automation. It is routinely used for high and low level alarm, continuous level monitoring, interface transmitters, plugged chute detection and even dry pump control. As new technologies have been introduced, such as ultrasonics, ...
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A novel integrated approach for designing, testing and implementing WRRF process control solutions. Proceedings WEFTEC.15
Abstract: This paper describes an integrated approach for designing, testing and implementing process control solutions for Water Resource Recovery Facilities (WRRFs) using a novel simulation platform. The user-friendly modeling and simulation environment encapsulates expert knowledge and standardizes typical tasks and goes far beyond classic simulators in terms of the level of detail of modeling ...
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Fault Detection for Control of Wastewater Treatment Plants
Abstract: Interest in real-time model-based control is increasing as more and more facilities are being asked to meet stricter effluent requirements while at the same time minimizing costs. It has been identified that biological process models and automated process control technologies are being used at wastewater treatments plants throughout the world and that great potential for optimising ...
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Progress in sensor technology - progress in process control - Part I: Sensor property investigation and classification
Abstract: To ensure correctly operating control systems, the measurement and control equipment in WWTPs must be mutually consistent. The dynamic simulation of activated sludge systems could offer a suitable tool for designing and optimising control strategies. Ideal or simplified sensor models represent a limiting factor for comparability with field applications. More realistic sensor models are ...
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Success of Onlin Leads to Closing for Wastewater 2 Process Control of Consent Order Treatment Plant
In 2003, Plant City, a small Florida city of 30,000 residents, faced a very big problem. The Florida Department of Environmental Protection (FDF.P) determined that the city's wastewater treatment plant was not consistently operating within its permit limits, and placed it under a consent order. Plant City is a highly industrialized area. "Our industrial loading is very diverse and includes metal ...
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Application of response surface methodology as a new PID tuning method in an electrocoagulation process control case
In this work the application of response surface methodology (RSM) to proportional-integral-derivative (PID) controller parameter tuning for electrocoagulation (EC) treatment of pulp and paper mill wastewater was researched. Dynamic data for two controlled variables (pH and electrical conductivity) were obtained under pseudo random binary sequence (PRBS) input signals applied to manipulated ...
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pH and ORP sensors as used for process control in bleaching operations at pulp mills - Case Study
Specially Engineering Dissolved Chlorine Gas Resistant Solid State Reference Flat, yet rugged break resistant glass minimize cleaning requirements Application specific engineered thermoplastics and conductive polymer materials of construction lead to optimized sensor lifetime and accuracy The Problem A pulp and paper producer wanted to improve their control and reduce their maintenance ...
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How to Use Particle Counters with SPC
In this final blog of our recent basic particle knowledge series, we look at particle counters and Statistical Process Control (SPC) and how their combined effort can be used to prevent particle excursion events before they happen. ...
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