With the combination of the most modern technology for industrial process optimization, end user experience with the operation of dry gas scrubbing technology could be facilitated to its greatest extension by applying existing user-friendly and available instrumentation controls and gas analyzers.
The combination of SO2 gas analyzers upstream and downstream of the dry scrubber, very accurate measuring of sorbent injection rates and reliable baghouse operation monitoring sensors offer… Show more

With the combination of the most modern technology for industrial process optimization, end user experience with the operation of dry gas scrubbing technology could be facilitated to its greatest extension by applying existing user-friendly and available instrumentation controls and gas analyzers.
The combination of SO2 gas analyzers upstream and downstream of the dry scrubber, very accurate measuring of sorbent injection rates and reliable baghouse operation monitoring sensors offer considerable savings in operation and maintenance for the life of the plant.
In this example-rich very interactive webinar, ENVEA will describe each technology individually and the benefits of bundling them up in one optimization package, describing achievable savings that any dry scrubber operator can count on. Show less

A North American wood products facility needed to reduce emissions from burning wood waste, but plant performance and environmental requirements also needed to be in balance in order to hit production targets. Dürr Megtec specified and installed a new dry electrostatic precipitator (DESP) to treat the process gas from the three wood-fired boilers. The DESP and related systems work as designed and achieved all of the stated environmental and operational goals.

Particulate emissions control is one of the earliest requirements in cement kilns that produce clinker. While dry electrostatic precipitators (ESPs) are one of the most common means of control, several changes are now taking place, driving cement producers towards a break from the status quo, and towards more modern means of emissions reductions.

Environmental legislation worldwide are getting each time more stringent, requiring industrial mills and power plants to refer to best available technologies and practices in order to achieve enhanced performance out of existing equipment at their plants.
Cost-conscious end users will also look for efficiency improvements by applying the latest and leading technologies without major capital expenditures, looking for ways to revamp the existing fleet in order to achieve desirable level of… Show more

Environmental legislation worldwide are getting each time more stringent, requiring industrial mills and power plants to refer to best available technologies and practices in order to achieve enhanced performance out of existing equipment at their plants.
Cost-conscious end users will also look for efficiency improvements by applying the latest and leading technologies without major capital expenditures, looking for ways to revamp the existing fleet in order to achieve desirable level of particulate matter (PM) emissions in a reliable and cost-effective way, ultimately improving performance of existing electrostatic precipitators (ESP) in their fleet.
This article describes a successful case in which three-phase power supplies (TPPS) were used in conjunction with Automatic Voltage Controllers (AVC) as part of the solution in reducing the ESP PM emissions in cement mills in China. Show less

As performance demands increase for SCR systems, the design of key components becomes more critical. These demands transcend beyond only NOx removal and must be considered for ammonia slip and emission range profiles. The two chief components affected by these designs are the catalyst and its reactor housing, and the ammonia injection system. Since the catalyst is a static design component and its performance is driven by the quality of the exhaust gas being treated,
achieving an adequate… Show more

As performance demands increase for SCR systems, the design of key components becomes more critical. These demands transcend beyond only NOx removal and must be considered for ammonia slip and emission range profiles. The two chief components affected by these designs are the catalyst and its reactor housing, and the ammonia injection system. Since the catalyst is a static design component and its performance is driven by the quality of the exhaust gas being treated,
achieving an adequate ammonia distribution prior to the catalyst is also becoming more demanding.
High performance ammonia systems using efficient IsoSwirl™ mixers offer a means to obtain excellent ammonia distributions while avoiding system tuning requirements to produce a robust SCR system. It can also be a very effective answer to the more stringent environmental legislations worldwide, making IsoSwirl™ an item of choice for challenging SCR performances. Latest SCR designs include optimized catalyst loading facilities and reduced reactor size, which combined with proper catalyst management practices prove to be an effective way to save in costs for both CAPEX and OPEX for the end user. Show less

The technology of SCR systems has continually improved since the early designs developed in the U.S. in the 1990s. In addition to better performance, such as higher NOx removal levels and more robust operation, costs for SCR systems have decreased with improvements in catalyst technology, reactor design, and ammonia supply components.
Advanced IsoSwirl™ ammonia distribution systems require less additional catalyst to compensate for poor ammonia to NOx distributions. Redesigned reactor… Show more

The technology of SCR systems has continually improved since the early designs developed in the U.S. in the 1990s. In addition to better performance, such as higher NOx removal levels and more robust operation, costs for SCR systems have decreased with improvements in catalyst technology, reactor design, and ammonia supply components.
Advanced IsoSwirl™ ammonia distribution systems require less additional catalyst to compensate for poor ammonia to NOx distributions. Redesigned reactor catalyst arrangements offer benefits towards more compact reactor configurations. Innovative catalyst handling facilities offer the potential for rapid catalyst loading or replacement cycles. Quick catalyst handling facilitates a catalyst management plan which avoids the requirement and associated costs with spare layers in the catalyst reactor.
This presentation will discuss the features of these various SCR system improvements. An economic cost analysis contrasting the savings between the improved SCR system and a conventional SCR system designs will be presented. Show less

The technology of SCR systems has continually improved since the early designs developed in the U.S. in the 1990s. In addition to better performance, such as higher NOx removal levels and more robust operation, costs for SCR systems have decreased with improvements in catalyst technology, reactor design, and ammonia supply components.
Advanced IsoSwirl™ ammonia distribution systems require less additional catalyst to compensate for poor ammonia to NOx distributions. Redesigned reactor… Show more

The technology of SCR systems has continually improved since the early designs developed in the U.S. in the 1990s. In addition to better performance, such as higher NOx removal levels and more robust operation, costs for SCR systems have decreased with improvements in catalyst technology, reactor design, and ammonia supply components.
Advanced IsoSwirl™ ammonia distribution systems require less additional catalyst to compensate for poor ammonia to NOx distributions. Redesigned reactor catalyst arrangements offer benefits towards more compact reactor configurations. Innovative catalyst handling facilities offer the potential for rapid catalyst loading or replacement cycles. Quick catalyst handling facilitates a catalyst management plan which avoids the requirement and associated costs with spare layers in the catalyst reactor.
This presentation will discuss the features of these various SCR system improvements. An economic cost analysis contrasting the savings between the improved SCR system and a conventional SCR system designs will be presented. Show less

The NID(TM) System is an advanced multi-pollutant control dry scrubbing process that was developed by Alstom in the late 1980’s, with commercial units in operation since 1996. The system allows for SO2 removal rates greater than 98% while operating with high sulphur fuels that would be beyond the capabilities of traditional SDA (spray dryer) dry scrubber systems. Continuous innovation and improvement of this dry scrubbing system has allowed it to be applied to the ever tightening environmental… Show more

The NID(TM) System is an advanced multi-pollutant control dry scrubbing process that was developed by Alstom in the late 1980’s, with commercial units in operation since 1996. The system allows for SO2 removal rates greater than 98% while operating with high sulphur fuels that would be beyond the capabilities of traditional SDA (spray dryer) dry scrubber systems. Continuous innovation and improvement of this dry scrubbing system has allowed it to be applied to the ever tightening environmental emissions limits for pulverized coal boilers in the US and elsewhere.
Brayton Point Unit 3 is a 697MW(gross) PC boiler operating in Massachusetts, USA. The NID(TM) system supplied was designed to meet 98% removal with an inlet SO2 concentration of 2,830 mg/Nm3 dry (2.5 lb/MMBtu) along with additional requirements for Mercury, SO3, and Total Particulate control.
This paper provides an overview of the NID system and highlights the start-up, operations, and performance of the Brayton Point NID DFGD System after almost two years of operational experience. Show less

The NID System is an advanced multi-pollutant control dry scrubbing process that was developed by Alstom in the late 1980's, with commercial units in operation since 1996. The system allows for SO2 removal rates greater than 98% while operating with high sulfur fuels that would be beyond the capabilities of traditional SDA (spray dryer) dry scrubber systems. Continuous innovation and improvement of this dry scrubbing system has allowed it to be applied to the ever tightening environmental… Show more

The NID System is an advanced multi-pollutant control dry scrubbing process that was developed by Alstom in the late 1980's, with commercial units in operation since 1996. The system allows for SO2 removal rates greater than 98% while operating with high sulfur fuels that would be beyond the capabilities of traditional SDA (spray dryer) dry scrubber systems. Continuous innovation and improvement of this dry scrubbing system has allowed it to be applied to the ever tightening environmental emissions limits for pulverized coal boilers in the US and elsewhere.
Brayton Point Unit 3 is a 697MW(gross) PC boiler operating in Massachusetts, USA. The NID system supplied was designed to meet 98% removal with an inlet SO2 concentration of 2,830 mg/Nm3 dry (2.5 lb/MMBtu) along with additional requirements for Mercury, SO3, and Total Particulate control.
This paper provides an overview of the NID system and highlights the startup, operations, and performance of the Brayton Point NID DFGD System after almost two years of operational experience. Show less

Selective Catalytic Reduction has been well demonstrated as an effective technology for reducing NOx emissions from coal-fired utility boilers. Emerging environmental regulations can have an impact on the traditional design and operation of an SCR system.
Increasing demands on SCR emission reduction performance affects the design of many of the SCR components aside from the catalyst bed. Obtaining an optimal distribution of ammonia reagent in the flue gas stream is a primary requirement… Show more

Selective Catalytic Reduction has been well demonstrated as an effective technology for reducing NOx emissions from coal-fired utility boilers. Emerging environmental regulations can have an impact on the traditional design and operation of an SCR system.
Increasing demands on SCR emission reduction performance affects the design of many of the SCR components aside from the catalyst bed. Obtaining an optimal distribution of ammonia reagent in the flue gas stream is a primary requirement for high performance levels. This requirement must be balanced with limited space availability, all while obtaining both robust operation and minimal operating costs. Addressing these issues has led to the development of a variety of ammonia injection methods.
This presentation will discuss the SCR and ammonia systems design strategies for meeting these challenges. Show less

Selective Catalytic Reduction has been well demonstrated as an effective technology for reducing NOx emissions from coal-fired utility boilers. Emerging environmental regulations can have an impact on the traditional design and operation of an SCR system.
Increasing demands on SCR emission reduction performance affects the design of many of the SCR components aside from the catalyst bed. Obtaining an optimal distribution of ammonia reagent in the flue gas stream is a primary requirement for… Show more

Selective Catalytic Reduction has been well demonstrated as an effective technology for reducing NOx emissions from coal-fired utility boilers. Emerging environmental regulations can have an impact on the traditional design and operation of an SCR system.
Increasing demands on SCR emission reduction performance affects the design of many of the SCR components aside from the catalyst bed. Obtaining an optimal distribution of ammonia reagent in the flue gas stream is a primary requirement for high performance levels. This requirement must be balanced with limited space availability, all while obtaining both robust operation and minimal operating costs. Addressing these issues has led to the development of a variety of ammonia injection and distribution methods. Gas mixer designs offer a means to obtain high levels of deNOx performance while addressing problematic conditions and featuring simple ammonia delivery systems. Ammonia injection methods may utilize either traditional, vapor-phase techniques or the direct injection of an aqueous ammonia supply which avoids ammonia vaporizer requirements.
This presentation will discuss the SCR and ammonia systems design strategies for meeting these challenges. Show less

Selective Catalytic Reduction (SCR) is widely used to control NOx emissions from fossil-fueled power plants. The formation of SO3 emissions from SO2 oxidation also occurs during NOx removal and the degree of oxidation is dependent on catalyst and operating condition factors. For high temperature SCR applications, SCR system design becomes challenging to meet both NOx and SO3 emission levels.
This presentation will discuss Alstom’s experience with the design and operation of SCR systems at… Show more

Selective Catalytic Reduction (SCR) is widely used to control NOx emissions from fossil-fueled power plants. The formation of SO3 emissions from SO2 oxidation also occurs during NOx removal and the degree of oxidation is dependent on catalyst and operating condition factors. For high temperature SCR applications, SCR system design becomes challenging to meet both NOx and SO3 emission levels.
This presentation will discuss Alstom’s experience with the design and operation of SCR systems at the coal-fired EDP Sines Power Plant (Portugal). These SCR units were designed for MCR operation at 800°F with 82% NOx removal and 1% SO2 oxidation rates. This presentation will discuss the SO2 oxidation concerns, design strategy, and field performance results for these SCR systems. Show less

Selective Catalytic Reduction has been well demonstrated as an effective technology for reducing NOx emissions from coal-fired utility boilers. Emerging environmental regulations can have an impact on the traditional design and operation of an SCR system.
Increasing demands on SCR emission reduction performance affects the design of many of the SCR components aside from the catalyst bed. Obtaining an optimal distribution of ammonia reagent in the flue gas stream is a primary requirement… Show more

Selective Catalytic Reduction has been well demonstrated as an effective technology for reducing NOx emissions from coal-fired utility boilers. Emerging environmental regulations can have an impact on the traditional design and operation of an SCR system.
Increasing demands on SCR emission reduction performance affects the design of many of the SCR components aside from the catalyst bed. Obtaining an optimal distribution of ammonia reagent in the flue gas stream is a primary requirement for high performance levels. This requirement must be balanced with limited space availability, all while obtaining both robust operation and minimal operating costs. Addressing these issues has led to the development of a variety of ammonia injection methods.
This presentation will discuss the SCR and ammonia systems design strategies for meeting these challenges. Show less