Introduction
The ammonia (NH3) gas is injected to remove the NOx and thus reduce the NOx concentration in the stack flue gas.
With conventional NH3 analyzers that perform measurements indirectly, NH3 concentrations are obtained through a sampling system. Therefore, there are problems with the maintenance and running costs of the sampling system, and time delays in measurement. The TDLS8000 Laser Analyzer is the solution to all these problems.
Expected Benefits
- Eliminates the need for sampling and reduces the maintenance and running costs of the sampling system
- High-speed response, possible to apply measurement results to control the NH3 injection volume, and reduction and optimization of the NH3 injection volume
- Continuous monitoring, NH3 emission volume monitoring, and environmentally friendly
- Extends the service life of NOx removal equipment and reduces the ammonium sulfate precipitation of the air heater
Process Overview
The NH3 gas is injected to remove the NOx and thus reduce the NOx concentration in the stack flue gas, as well as to increase the dust collection efficiency of the dust collector (ESP) and prevent erosion. Excess NH3 injection increases the running cost and the residual NH3 amount, resulting in the generation of a foul odor. Therefore, the NH3 concentration in the stack flue gas is measured, controlled, and monitored.
Example of Boiler Flue Gas, NOx Removal Process (Oil and Gas Fuels)
Solution Details
As compared with conventional NH3 analyzers that perform measurements through a sampling system, the TDLS8000 is able to measure the NH3 concentrations in furnaces directly and thus reduce the maintenance and running costs.
Field Data
Changes in NH3 Injection Volume and Measured Values (Installation Point A / Without NOx Removal Equipment)
The TDLS responds to NH3 injection volume changes at high speed and thus is able to control and monitor the optimum NH3 injection volume.
Measurement System
- TDLS(NH3 analyzer)
TDLS8000-☐☐-A1-☐☐-A1-☐-N/☐ - HMI unit
YH8000-☐☐-W-N/☐ - Cable
K9775XA～XG - Accessories
If necessary, please prepare ball valve for process isolation, DC power supply etc.
And, When P and T are big fluctuation (P; ±5kPa, T; ±10℃), please consider input P, T analog signal or transmitters connection.
Utility
- Please prepare instrument air or N2.
2 to 20 L/min for optioc.
5 to 30 L/min for process window
Notes
- Power supply: 24 VDC
- Purge gas: Instrumentation air or N2, Flow rate: 5 to 50 L/min (depending on the application)
- Dust concentration (standard): 15 g/Nm3 or less
Industrien
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Base Chemical
Yokogawa has been serving the bulk chemical market globally and is the recognized leader in this market. With products, solutions, and industry expertise, Yokogawa understands your market and production needs and will work with you to provide a reliable, and cost effective solution through the lifecycle of your plant.
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Chemical
Chemical plants rely on continuous and batch production processes, each posing different requirements for a control system. A continuous process calls for a robust and stable control system that will not fail and cause the shutdown of a production line, whereas the emphasis with a batch process is on having a control system that allows great flexibility in making adjustments to formulas, procedures, and the like. Both kinds of systems need to be managed in available quality history of product, and to be able to execute non-routine operations. With its extensive product portfolio, experienced systems engineers, and global sales and service network, Yokogawa has a solution for every plant process.
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Geothermal Power
Generating electricity despite the weather.
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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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Refining
In the ever changing marketplace, refineries are seen not only as crude processing units but also as profit centers. At the same time, there is a keen awareness of the need for safety at such facilities. A total production solution that encompasses planning, scheduling, management, and control is required to achieve long-term goals for profitability, efficiency, and environmental protection. With years of expertise in the automation field, Yokogawa can bring you affordable total solutions for improved operability and a cleaner world.
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Thermal
Thermal power using coal, oil or gas as fuel accounts for the majority of electric generation throughout the world.
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Wasserstoff: Netto-Null-Emissionen und Energiesicherheit schneller erreichen
Yokogawa stellt Europa auf ein neues, datengesteuertes und digitales Energiesystem um, das von erneuerbaren Energien angetrieben wird und einen effizienteren Weg zu Netto-Null-Emission und Energiesicherheit ebnet.
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Water & Wastewater
Water resources are finite, and therefore contributing to a sustainable water cycle is one of the Sustainable Development Goals (SDGs). Yokogawa has been providing advanced digital control solutions for the stable supply of clean and safe water, wastewater treatment for protecting the water environment, water loss management and optimization of plant operation for reducing CO2 emissions and running costs. With our leading-edge technologies, dependable products and extensive expertise and experience of diverse water projects around the world, we work with you to provide sustainable water solutions that boost your business and add value throughout the plant lifecycle.
Yokogawa supports a wide range of water control applications in both the municipal and industrial water markets.
Zugehörige Produkte & Lösungen
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In-situ-Gasanalysator TDLS8000
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Gasanalysatoren
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Sauerstoffanalysatoren
Sauerstoffanalysatoren liefern wertvolle Messwerte, beispielsweise für die Regelung von Verbrennungsprozessen, die Einhaltung der Prozessqualität, die Gewährleistung der Prozesssicherheit und Emissionseinhaltung.