The Gas Turbine Air Treatment Market and Knowledge Bridge integrates in a superior way for the supplier to fine tune his strategy and then execute it.

The system addresses the initial capital purchase and the operating and maintenance opportunities.

It covers materials and coatings as well as valves, pumps and other system sub-components. 

Gas Turbine Air Treatment Global Decisions Positioning System^™ (GDPS).  The GDPS is a very effective knowledge bridge to the purchaser. Since operators can have access to this system free of charge and since it saves time and results in better decisions, it is going to be utilized to its fullest. If the supplier can make the case for providing the best product, it will be very effective.  He can make this case by using all the vehicles which travel on the 4 lanes of the bridge. Some of these vehicles are provided in the basic subscription. Others can be added.

Gas Turbine Air Treatment needs to be viewed as an Integrated System by the purchaser of the components. This requires navigating a number of different decision trees. McIlvaine is making this task easier with the Gas Turbine Air Treatment Global Decisions Positioning System™ (GDPS). This service is provided free of charge to operators of turbines. Access to the system is also part of this Gas Turbine Air Treatment Markets and Knowledge Bridge

Two recent developments in gas turbine air treatment are the expanded use of HEPA filters for gas turbine intake air and SCR with both CO and NO_x catalyst for the tail-end gas. Some dust that the inlet filter does not remove is going to deposit on the catalyst. A facility can use a very small catalyst pitch and save lots of money, but the increase in pressure loss along with deposition will increase operating cost and decrease electricity output. Therefore, the choice of inlet filter needs to be viewed initially in terms of catalyst pitch selection and then in terms of catalyst life. 

First in California and now in other places, the stack gas emission limits are lower than the ambient air particulate matter concentration. In these cases, the inlet air filter becomes a key element in stack gas compliance. Gas turbine inlet ambient air undergoes a series of treatments. The initial treatment is to remove large weather-related contaminants e.g., snow, rain, etc. The humidity and temperature of the ambient air are also adjusted to increase the weight and, therefore, electrical output. This treatment can range from fogging nozzles to a full air conditioning system. Droplets are formed, coalesced and removed. Particulate filtration can be with a series of filters ranging from coarse to HEPA or it can take place with self-cleaning cartridges.

One alternative for NO_x control during combustion is the low NO_x burner. Another alternate is water injection. Once the air has been mixed with the gas and combusted, it passes through other systems in the gas path. In a combined cycle process there is likely to be a duct burner to adjust HRSG steam temperature. This can add to the pollutants.  CO and NO_x catalysts are also utilized. However, the accompanying ammonia injection can create ammonia slip which is regulated and also tends to foul the catalyst.

With single cycle systems many of the air treatment challenges are greater. If a low temperature catalyst is used, tempering air is needed. This creates a challenge in providing laminar flow to the catalyst. If a high temperature catalyst is used, higher catalyst costs are encountered and higher maintenance is possible.

The air treatment needs are not static. The higher performance turbines are more likely to be compromised by small particles. The use of gas turbines and certainly the use of SCR are expanding to applications that are more challenging. The seawater and salts found in marine applications including floating production, storage and offloading (FPSO) units are examples.

Application in refineries in South America where inlet air quality may be low and fuel includes less than pristine liquids is another example. The rapid cycling of turbines complementing wind and solar is another newer challenge.

The changes and increasing complexity relative to gas turbine air treatment have demonstrated the need for a system to aid decision makers. McIlvaine is addressing this need with Gas Turbine Air Treatment Global Decisions Positioning System^™ (GDPS).

For more information on Gas Turbine Air Treatment Market and Knowledge Bridge, click on:

http://home.mcilvainecompany.com/index.php/markets/28-energy/610-59ei.

Led by East Asia, municipal wastewater treatment plants around the world will spend $8.35 billion for pumps in 2014.  This is the latest forecasts in Pumps World Markets published by the McIlvaine Company.

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Nearly $6 billion will be spent on centrifugal pumps.  Rotary pumps will account for just under $1 billion in expenditures.  The remainder is divided between diaphragm and reciprocating pumps.

A significant portion of the total expenditure will be for the transport of sewage from households and other generation points to the plants. Within the plant there is primary treatment usually followed by secondary treatment and in some cases tertiary treatment.

Sludge dewatering is one of the processes incorporated in secondary treatment.  In one of the typical processes, pumps are used to:

Pumps can move dewatered sludges long distances and result in lower capital and operating costs than using mechanical conveyors.

For more information on   Pumps World Markets, click on:

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