Tunable diode laser spectrometers (TDLS) allow for real-time gas analysis to increase efficiency, safety, throughput, quality, and environmental compliance. The non-contacting sensor allows measurement under severe conditions, such as high temperature, high pressure, corrosive/abrasive conditions, high dust concentration, etc. Maintenance can also be performed without taking the process offline because the TDLS is isolated from the process. The TDLS is a robust process analyzer that contributes to stable and efficient operation.
>>> Application Notes
Various plant units and piping may contain pressurized, high-temperature, corrosive, combustible, and/or toxic gases which may be problematic for traditional technologies. The TDLS8000 can detect the concentration of process gas in real time without direct contact to allow for quick response to optimize process availability without sacrificing measurement availability.
The TDLS8000 helps reduce total OPEX and maximize output safely
Example: The TDLS8000 can measure up to 30m over the entire length of a furnace at the top of the radiant section to analyze for efficient combustion. Based on gas concentrations, operators can optimize the air-fuel ratio and analyze heat transfer efficiency while ensuring a safe environment.
The TDLS8000 was designed to help users meet a variety of operational standards and is capable of being integrated into SIL2 and SIL3 applications.
>>> Operational Improvement
Yokogawa’s new TDLS™8000 houses all of the industry’s leading features in one robust device. The platform design is for in situ measurements which negate the need for sample extraction and conditioning.
Sampling unnecessary, installation flange is only on one side, installation cost is reduced by half while keeping high speed measurement / high speed response. It can be easily exchanged from existing equipment.
In a world which is continuously evolving in the direction of increased process optimization while maintaining safe operating state, it’s difficult to retain a competitive advantage without adopting new measurement techniques to stay cutting-edge.
The tunable diode laser absorption spectrometers (TDLAS) operate by measuring the amount of a laser light that is absorbed as it travels through the gas being measured. Because the sensor does not have contact with the process and there are no moving parts, maintenance is minimized, which decreases downtime and reduces the long-term cost of ownership (LTCO).
The attenuation due to IR absorption is determined by Lambert Beers'Law.
Yokogawa Electric's original spectral area method is hardly affected by interferences of other gases, and it can be measured with high accuracy by temperature and pressure-compensation.
The use of a reference cell keeps the peak position locked during trace measurement when the absorption signal is weak.
This data is useful for remote troubleshooting of process issues long after upsets have occurred.
The TruePeak Tunable Diode Laser Spectrometers operate by measuring the amount of a laser light that is absorbed as it travels through the gas being measured. Involving no sensor contact with the process and no moving parts, it leads to a high mean time between failures (MTBF) and hence a low long term cost of ownership (LTCO).
Fired heaters are integral to industrial processes, including hydrocarbon processing and power generation. Specifically designed for the reaction of fuel and air to produce extremely high gas temperatures, heaters transfer this energy to potentially highly flammable process fluids via heat exchangers. They consume large quantities of fuel, produce large quantities of emissions and are a potential safety hazard to personnel and plant.
Yokogawa TDLS analyzers help control fired heater combustion with ever greater accuracy and reliability. There are measurable rewards for operating fired heaters at Low Excess Air (LEA) levels. In LEA combustion control, the lowest level of fuel is consumed and the products of combustion are cooled the least by unused excess air.
The cost benefits of these efficiencies are considerable, with just a single percentage saving in fuel enabling savings of tens or even hundreds of thousands of dollars per year. Controlling air levels just above the point at which incomplete combustion starts also enables the "cleanest burn," helping plants meet environmental emissions requirements. This in particular reduces the emission of NOx.
Maintaining operational efficiency in your furnaces to maximize throughput and minimize fuel consumption while ensuring safe operation is truly a difficult challenge.
Conventional analyzer technologies, such as zirconia and catalytic bead measurements, are point style measurements which can fail to completely capture what is happening in your furnace. In addition to being a potential ignition source, zirconia can have its reading lowered in the presence of combustibles. COE analysis has its own issues due to the minutes-long response time required for typical breakthrough levels in the thousands of ppm in the radiant section of a fired asset, and often require a separate sensor for CH4 measurement. Such issues can have a large impact on how safely your furnace is being operated.
The modern unit operator needs access to the most trustworthy data available to quickly mitigate the occurrence of an unsafe condition if they’re going to optimize asset performance.
The introduction of Yokogawa’s Tunable Diode Laser Spectrometer (TDLS) technology allows for the real-time, in-situ, interference free, reliable, and accurate measurement of oxygen and CO to maximize efficiencies.
It’s a major advance in supporting the entire facility in operating the asset safely and efficiently.
When it comes to understanding what is happening in your furnace, a reliance on limited data outputs from conventional analyzer technology places a greater onus on the skills of the operator.
TDLS technology reduces the burden on operator competence and the potential for human error by delivering the most trustworthy data on the entire furnace as quickly as possible for optimal asset efficiency and safety.
It’s imperative you have the ability to detect, measure and control LOC (Limiting Oxygen Concentration) to ensure the safety of your facility and your workmates.
Electrolysis plants create hydrogen and chlorine from a brine solution. Chlorine gas generated from the anolyte of the electrolysis tank generally contains between 0.5 to 2.0 vol% H2O. The sample is then cooled and filtered to remove brine, subsequently coming out as wet chlorine gas. The wet gas is sent to a drying tower where it is treated with sulfuric acid to get moisture down to the ppm level.
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.
In maintaining and managing industrial plants, monitoring waste water pH/ORP is both a legal obligation and an unavoidable necessity for protecting the environment. Monitoring without an attentive eye can lead to severe consequences.
Considering safety and environmental issues such as combustion efficiency and decreasing NOX and CO in exhaust gas, it has become important to control O2 concentration in garbage incineration processes.
Cement is made by heating calcareous and argillaceous materials to a temperature between 1100 and 1500 °C. As this process uses massive amounts of energy, various energy saving measures are taken, including the measurement of oxygen concentrations in exhaust gases to control combustion.
Reduction of air pollutant emissions is essential to protecting the environment and this is an issue that concerns all industries. Efforts are being made to reduce the emission of harmful substances from municipal refuse incinerators by measuring concentrations of components such as NOx, SO2, CO2, and CO in their exhaust gases.
In recent years, shale gas extraction technology has made rapid progress, inducing a shale gas revolution mainly in the USA. Thus, the need for analysis of hydrocarbon gases, including natural gas, is expected to grow rapidly. Traditionally gas chromatography has been used for the analysis of hydrocarbon gases; it can accurately measure the concentration of each hydrocarbon component in a sample of natural gas.
Combustion furnaces such as heating furnaces and boilers in plants include various sizes and types, and serve as energy sources, that is, they are cores in all production activities. Because a large amount of fuel such as gas or fuel oil is consumed in plants, their combustion efficiency directly affects the performance and running cost of the plants.
Spectrometric technology can assess many critical characteristics about products, but it has limits. It can be challenging to determine when the line has been crossed
With fired heaters, users hope to get greater efficiency and reduced emissions but often are disappointed. Given the number of fired heaters operating every day and their importance in the process industries, any improvements realized across the board will have huge impacts. More units can reach their potential with some simple changes in work practices and technology upgrades.
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