Essential Equipments for Industries
Boilers are used in a broad range of industries such as electric power, pharmaceuticals, chemicals, ceramics, pulp and paper, and food and beverage. Amid the rising energy costs, tightening environmental regulations, and increasing awareness of safety as of late, the needs for high efficiency operation, low emission operation, and safe and stable operation of boilers are growing.
Increasing Efficiency of Boilers
In order to ensure the air and fuel are combusted at an optimal ratio, the waste of fuel is eliminated, and the exhaust gas is cleaned, real-time monitoring of the oxygen concentration of combustion gases is required. Equipped with an oxygen sensor unit with a longer life span, the Zirconia Oxygen Analyzer ZR series are capable of measuring an oxygen concentration with high reliability.
Safe and Stable Operation
A single-loop controller can be used to properly distribute control functionality. Offering the advantages of flexibility of building distributed control systems, simple maintenance, compatibility with conventional systems, and the like, the YS1000 Series of Single-loop Controllers are ideal for safe and stable operation at low costs.
Monitoring the drum level and steam flow rate in accurate at any conditions
In order to ensure highly efficient and safely operated boilers, it is also indispensable to accurately monitor the drum level and steam flow rate. The EJA and EJX Series of Differential Pressure Transmitters are capable of measuring the drum level with high stability even in actual applications at high temperatures and high pressures.
Voretex Flowmeter VY Series Built-in Temperature Sensor Type is a simple and highly reliable features and allows simultaneous measurement of flow rate and temperature and caluculation of steam mass flow rate and energy flow rate with bulit-in steam table.
Why Buy Yokogawa?
Yokogawa offers a wide variety of sensors and controllers that are used to monitor and operate boilers, and contributes to increasing the efficiency and environmental performance of boilers, as well as ensuring their safe and stable operation. We want you to explore Yokogawa's sensors and controllers in order to increase the efficiency and environmental performance of your boilers, and ensure their safe and stable operation.
Drum Level Measurement
Overview and Problems
- Drum level measurement
- High stability measurement required under large static pressure change
Solution
- Field proven silicon resonant sensor guarantees long term stability
- EJA: ±0.1% of URL per 10 years
- EJX: ±0.1% of URL per 15 years
- Under all conditions (temperature, static and over pressures)
Benefits
- Long term high stability measurement is realized under actual plant conditions
Combustion Control
Overview and Problems
- Perform safe and stable control at low cost
- Lower levels of emission output
Solution
- Simple programming by Function Block wiring method
- Cascade primary direct control
- Stable level control when boiler is started - Cross limit control calculation
- Air and flow are calculated so that air flow always exceed fuel flow to prevent incomplete combustion and explosion - Feed forward control
- The main stream pressure and feed water level are controlled quickly in response to changes in the main stream flow
Benefits
- Reduced debugging time
- Improvement of the reliability of programs
- Safe and stable control at low cost
Steam Flow Measurement
Overview and Problems
- Flow measurement for utility steam
- Conventional orifice flowmeter requires complicated, high cost installation and is not accurate
* For more details, please refer to Why are Vortex Flowmeter VY Series Ideal Steam Flowmeters?
Solution
Steam Flow Management by Mass Flow Rate (Accuracy: ±2% of Reading)
- Volumetric flow rate measurement by flowmeter
- Temperature measurement by temperature sensor or temperature transmitter
- Mass flow rate calculation based on volumetric flow rate and temperature
The Vortex Flowmeter VY Series (Built-in Temperature Sensor Type) provides all of these functions in a single device.
Benefits
- Low installation and operational costs
- Safety operation to reduce leakage points
- Save energy by accurate measurement
Combustion Control
Overview and Problems
- O2 control for optimum combustion
- Short sensor life by clogging
Solution
- Long life sensor with molecular bonding and special coating
- Cell life prediction
Benefits
- Fuel cost reduction
- Preventive maintenance
- Protect the environment, CO2 reduction
Combustion Control
Overview and Problems
- O2 control for optimum combustion of large-sized combustion equipment
- High installation cost for multipoint measurement
Solution
- Maximum 8 detectors can be connected to one AV550G converter
- O2 measurement of multiple points, individual concentration and average values
Benefits
- Accurate control by multipoint measurement
- Installation cost reduction
Our Key Technologies
EJA/EJX Silicone Resonant Sensor
By micro-machining the resonators directly within the single crystal silicon material we are able to derive the maximum benefits from the elasticity of the single crystal silicon material while enhancing sensitivity and repeatability. The properties of the resonators remain constant over time. This makes DPharp the ideal pressure sensor for harsh industrial automation environments. DPharp delivers stability, repeatability and reliability that you can rely on.
The VY Series Key Technology
The VY Series inherits the proven original sensing structure and high reliability of the YEWFLO series. Its unique shedder bar design with dual flow sensors provides robust, long-term stable performance. Moreover, with Yokogawa’s proprietary SSP signal processing technology, it automatically removes vibration noise and extracts true vortex signals, ensuring accurate and stable flow measurement.
YS1000 Dual CPU
With dual-CPU construction, manual control capability and display continues even if an abnormality occurs on one of the CPUs. If controller self-diagnostics detects a control circuit failure, the controller can suspend analog/digital output, switch to manual mode and allow manual control by operator.
Zirconia Oxygen Analyzers
- Get a long service life and stable operation with a Zirconia sensor
- Sensor replacement is easy
- A molecular bonding method completes installation of platinum electrodes, and its inherent connection prevents separation of Input signal Frequency analysis (SSP function) platinum from the Zirconia element.
- A lead-less electrode design eliminates electrical disconnection.
- Special coating protects the platinum and prevents the sensors from deteriorating.
- No special tool is required for cell replacement.
Related Industries
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Power
In the mid 1970s, Yokogawa entered the power business with the release of the EBS Electric Control System. Since then, Yokogawa has steadfastly continued with the development of our technologies and capabilities for providing the best services and solutions to our customers worldwide.
Yokogawa has operated the global power solutions network to play a more active role in the dynamic global power market. This has allowed closer teamwork within Yokogawa, bringing together our global resources and industry know-how. Yokogawa's power industry experts work together to bring each customer the solution that best suits their sophisticated requirements.
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Thermal
Thermal power using coal, oil or gas as fuel accounts for the majority of electric generation throughout the world.
Related Products & Solutions
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Pressure Transmitters
The accurate and stable measurement of process pressure with Yokogawa Pressure Transmitters supports the safe, reliable, and profitable operation of your plant.
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Temperature Transmitters
Yokogawa offers a full line of temperature transmitters that are head-mounted, panel-mounted, or field-mounted.
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Vortex Flowmeter VY Series
Vortex Flowmeter VY Series is the latest model of Yokogawa vortex flowmeter and is the successor to the digitalYEWFLO Series.
VY Series consists of the latest digital technology and Yokogawa's unique structure inherited from YEWFLO Series. -
Vortex Flowmeters
Yokogawa has been synonymous with Vortex flowmeters since pioneering the industrial Vortex flowmeters from 1969. Even since then, Yokogawa has continued to be at the fore front of vortex technology; so, today, Yokogawa offers a large variety of Vortex flowmeters, including custom made designs.
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YS1310
The YS1310 Indicator with Alarms is an input indicator that has alarms with two inputs. Two loops can be displayed simultaneously. A high limit alarm, low limit alarm, high-high limit alarm, and low-low limit alarm can be generated for each of the two inputs, and the AND connection or OR connection of arbitrary alarms can be output from a total of 6 contacts.
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YS1350/YS1360
The YS1350 is a manual setter that allows for manually outputting setting signals to controllers and the like. The YS1360 is a manual setter that allows for manually outputting operation signals to operation terminals.
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YS1500
The YS1500 Indicating Controller incorporates fundamental control functions required for PID control. Necessary functions can be selected in accordance with the user's purpose.
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YS1700
The YS1700 Programmable Indicating Controller can be tailored for various applications by running a user program, and offers high reliability thanks to Yokogawa's proprietary technology, user friendliness, and expandability.
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Zirconia Oxygen/Humidity Analyzer ZR22G, ZR802G
This Oxygen concentration and humidity at high temperatures consists of a ZR22G detector equipped with a long-life and highly reliable zirconia sensor, and a converter ZR802G equipped with digital communication and data log functions.
ZR22G and ZR802G can be measured directly and continuously without a sampling device. It is easy to maintain and reduce operating costs by self-diagnosis of sensor deterioration (without using calibration gas )and replacing the heater assembly on site.