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Advanced Process Control for optimizing Flue Gas Desulfurization
Yokogawa is improving plant efficiency by reducing pump horsepower while maintaining needed SO2 removal. The optimization system typically consists of three functions: enhanced regulatory control, model-based prediction, and process value prediction. The system uses these three functions to continuously determine the minimum required number of recirculation pumps in operation, and to calculate the setpoint for the limestone slurry flow PID (proportional-integral-derivative) control loop……………... Enhanced regulatory control governs the number of recirculation pumps in operation and calculates the slurry flow setpoint. It also calculates the optimal pH setpoint, using feed-forward control for some abnormal cases. Enhanced regulatory control also keeps track of the run time of each recirculation pump, and uses this data to equalize the operating times of the pumps.……………... This optimization system automatically adjusts to different coal types because it uses the inlet SO2 value as an input to the system. This value varies significantly based on the coal type and is an important parameter for optimizing control. The system also automatically adjusts for spray nozzle plugging and pump performance deterioration. Varying plant load is not a problem as the optimization system works well in the range from low to full load.……………... A 700-MW coal-fired power plant in Japan implemented the optimization system described above. This plant runs about 300 days per year at baseload, and is not in operation for the other 65 days of the year. The energy savings realized by running only the required number of recirculation pumps was 12.4% of the unit’s total house load, equating to about $900,000 in energy savings per year based on market conditions in Japan. Another benefit was reduced pump run times, which resulted in lower pump maintenance costs and extended pump life. A third benefit was less limestone usage.………………
Revision Date: 11/29/2018
Tags: Yokogawa China, Power Magazine
Yokogawa wirless system for monitoring rotating equipment
Yokogawa has created a sensor and wireless transmitter system designed specifically for continuous monitoring of the rotating equipment commonly used in process manufacturing facilities . The system is designed for easy installation on a wide variety of equipment. The piezoelectric acceleration sensor is compact and easy to install near the device’s bearings . A cable connects it to a wireless communication module, which can be mounted wherever it is convenient, and where it can be clear of obstructions able to interfere with its signal propagation. The complete system is self-powered using a battery in the communication module. With a one-minute data update rate, one set of batteries can run for up to 10 years. The data is sent via the wireless network to the system gateway. If other ISA100 Wireless field devices are already in use in the facility, the vibration monitors can become part of the same network, communicating with the gateway just like any other communication module or sensor. Data from the units installed throughout the plant can be directed to a control or monitoring system to inform operators and maintenance personnel as conditions change with the equipment being monitored.
Revision Date: 3/23/2018
Tags: Yokogawa Electric, Pump, Monitoring
Yokogawa instrumentation for efficient combustion control
Use of gas measurement with TDL improves combustion efficiency and lowers emissions. Tunable Diode laser spectroscopy ( TDLS) using infra red ( IR) technology can measure a number of gases including oxygen. This presentation from a 2015 industrial conference in Europe shows an example where the Yokogawa TDLS was used to reduce excess air from 3.5% to less than 1 %. Yokogawa and its competitor Zolo are supplying TLDS analyzers. In Pacific Corp session 1 the Yokogawa analyzer was mentioned. So this paper is being added to the intelligence system with the expectation that more specifically applicable information will be forthcoming.
Revision Date: 7/15/2016
Tags: PacifiCorp, Yokogawa Corporation of America, Analyzer, NOx, Tunable Diode Laser Spectroscopy, TDL-IR
Regional haze ruling for Pacific Corp
This July 5 2016 Federal register document partially approves and disapproves the original Utah plan. It rules that the BART alternative submitted in the Utah plan is not acceptable relative to NOx emissions at 4 units located at the Hunter and Huntington plants in Utah.
Revision Date: 7/15/2016
Tags: PacifiCorp, Yokogawa Corporation of America, TDL-IR, Tunable Diode Laser Spectroscopy, Analyzer, NOx
Boiler Feedwater Pump Efficiency Optimization - Yokogawa
The optimization of boiler feedwaer operations depends on controlling feedwater and drum pressure. The Yokogawa Dpharp can measure pressures up to 2000 psi and can measure across a range of pressures with high accuracy. Significant energy and maintenance reduction is achieved with optimization of pressure differential.
Revision Date: 9/17/2014
Tags: 221112 - Fossil Fuel 化石燃料, Yokogawa Electric, Boiler Feedwater Pump, Efficiency, Optimization
Yokogawa at Electric Power 2013
Revision Date: 5/24/2013
Tags: 221112 - Fossil Fuel 化石燃料, Yokogawa Electric, Instrument, Meter, SCR, SNCR, NH3 Monitor, IR Laser Spectroscopy, Testing, USA
Article by McIlvaine on Gas Turbine Emissions in Air Polluton Control Magazine
In this article, Bob McIlvaine talks about Gas Turbine Emissions and Controls, focusing on intake air filters and NH3 slip monitors.
Revision Date: 3/8/2013
Tags: 221112 - Fossil Fuel 化石燃料, Yokogawa Electric, Nederman, SICK MAIHAK, Analyzer - TDL, Analyzer - NH3, SCR, Air Filter, Ammonia Slip, Air Filtration, Air Intake, Air Pollution Control, Monitoring, Air Pollution Control
NH3 Slip Measurement by Donald Wyatt, Yokogawa – Youtube Presentation
Overview of tunable diode lasers for measuring ammonia slip and other gases.
Revision Date: 2/25/2013
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Yokogawa Electric, Analyzer - NH3, IR Laser Spectroscopy, SCR, SNCR, Ammonia Slip, Monitoring, Nox Control
NH3 Slip Measurement by Donald Wyatt, Yokogawa - Hot Topic Hour February 14, 2013
History of tunable diode lasers for measuring ammonia slip and other gases.
Revision Date: 2/14/2013
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Yokogawa Electric, SNCR, IR Laser Spectroscopy, SCR, Analyzer - NH3, Ammonia Slip, Air Pollution Control, Monitoring
Yokogawa Supplies Integrated Control System for Power Plant Upgrade in Australia
The 180-MW Morwell Power Station in Australia was built in the 1950s. As part of an extensive modernization program in 2008, Yokogawa Electric Co. was selected to supply an integrated control system which optimizes the combustion of brown coal and reduces emissions.
Revision Date: 1/8/2013
Tags: 221112 - Fossil Fuel 化石燃料, Yokogawa Electric, Integrated Control System, Australia
The gas-fired ROCA Power Station in The Netherlands captures CO2 from the flue gas and transports heat and captured CO2 through a pipeline network to over 100 nearby greenhouses. Yokogawa Electric Co. installed monitors and remote controllers in each greenhouse, along with a central control system, to regulate the transfer of heat and CO2.
Revision Date: 1/8/2013
Tags: 221112 - Fossil Fuel 化石燃料, Eneco, Yokogawa Electric, Integrated Control System, CO2 Monitor, Air Monitoring, Netherlands
Pha Lai 2 is a 600-MW coal-fired power station in Vietnam that supplies close to half of the electricity for Hanoi. Stable and reliable operation of the plant are critical. Yokogawa Electric Co. was selected to supply an integrated control system for the plant, which includes a burner management system and a coal handling system.
Revision Date: 1/8/2013
Tags: 221112 - Fossil Fuel 化石燃料, Pha Lai Thermo Power, Yokogawa Electric, Integrated Control System, Vietnam
Yokogawa Supplies Combustion Optimization System and Flue Gas Monitors for Biomass Plant
The 22.5 MW Pichit Biopower Plant in Thailand uses ground rice husks as its fuel. Yokogawa Electric Co. supplied an integrated control system that manages the complex sequence of effectively burning the biomass. The system includes zirconium oxygen analyzers to optimize the combustion process. Yokogawa also provided a number of flue gas monitors to measure CO, CO2, O2, NOx and SOx concentrations. All water used in the plant is analyzed by pH and conductivity meters.
Revision Date: 1/8/2013
Tags: 221117 - Biomass Power , Yokogawa Electric, A.T. Biopower, pH Meter, SO2 CEMS, NOx CEMS, O2 CEMS, CO CEMS, CO2 Monitor, Oxygen Analyzer, Thailand
Yokogawa Supplies Integrated Control System for 50-Year Old Power Plant in Missouri
The 50-year old James River Power Plant in Springfield, Missouri, consists of five coal-fired units with a total capacity of 253-MW. Yokogawa Electric Co. supplied an integrated control system for the plant that combines two control rooms and five separate control systems into one integrated system. The plant modernization project also included the installation of ultra-low-NOx burners and overfire-air to reduce NOx emissions.
Revision Date: 1/8/2013
Tags: 221112 - Fossil Fuel 化石燃料, Yokogawa Electric, City Utilities of Springfield, Low NOx Burner, Integrated Control System, USA
Yokogawa Supplies Control System to Ensure Smooth Supply of Power from Wind Farm
The Rokkasho Wind Farm in Japan uses large-capacity sodium sulfur (NAS) batteries to store electricity for supply to the national power grid. Yokogawa Electric Co. supplied a monitoring and control system which monitors each battery and each windmill, and calculates power output patterns to ensure a stable supply of power to the grid.
Revision Date: 1/8/2013
Tags: 221114 - Wind Power , Yokogawa Electric, Japan Wind Development, Integrated Control System, Japan
Yokogawa Supplies Integrated Control System for Power Plant at Chinese Petrochemical Complex
The Dushanzi Refinery & Petrochemical Complex in northwestern China processes crude oil and produces ethylene. The utility plant for the complex provides steam, electricity and water. Power is generated by five coal-fired circulating fluidized bed (CFB) boilers, four of which operate at a time. Yokogawa Electric Co. supplied the integrated control system to manage boiler efficiency, coal consumption, rate of electricity generation and other parameters.
Revision Date: 1/8/2013
Tags: 221112 - Fossil Fuel 化石燃料, PetroChina, Yokogawa Electric, Integrated Control System, CFB Boiler, China
Yokogawa Supplies Integrated Control System for Waste-to-Energy Plant in the UK
Lakeside EFW Ltd. operates an EFW (energy from waste) facility near London that burns household and municipal waste to produce electricity and exports at least 34-MW per hour to the national grid. Yokogawa Electric Co. was selected to supply the integrated control system to automate control of the facility’s boilers, burners and balance of plant facilities.
Revision Date: 1/8/2013
Tags: 221118 - Other Electric Power , Yokogawa Electric, Lakeside EFW, Integrated Control System, Municipal Waste Incineration, UK
Yokogawa Wins Control System Order for First IGCC Power Plant in Korea
Yokogawa Electric Co. has been awarded a contract by Doosan Heavy Industries to supply a control system for the first integrated gasification combined cycle (IGCC) power plant in South Korea. The 300-MW facility is being constructed by Korea Electric Power Corp. (KEPCO) in Taean, South Korea, and is expected to be completed by the end of 2015.
Revision Date: 1/8/2013
Tags: 221112 - Fossil Fuel 化石燃料, Yokogawa Electric, Korea Electric Power Co. (KEPCO), IGCC, Integrated Control System, South Korea