MACT Update provided in Hot Topic Discussion Yesterday, May 7, 2015

 

A MACT route map and summary was reviewed as a way to launch the MACT discussion yesterday. There are unique site specific factors which are even more important in MACT than in MATS. The reason is that in cement, brick and other industrial processes the material being processed may create more air toxics than the fuel.

The MACT route map cataloged the issues and options: 

Issues

o   Regulatory

o   Economic 

      Plant Specific 

Options for

 

The special focus yesterday was on dry sorbent injection.  This technology has risen to the top of the list in terms of relative importance. One reason is that it does not require much capital. Another is that the process is quickly implemented.  Many industrial facilities have waited to make a MACT choice and therefore are now limited to those solutions which can meet the deadlines. The complete MACT route map and summary is found in Power Plant Air Quality Decisions.

There were two speakers yesterday. Both addressed the use of hydrated lime.

Pat Mongoven of Mississippi Lime compared several types of hydrated lime.

 

 

 

 

MACT Compliance Options, by Pat Mongoven, Mississippi Lime, HTH 5-7-15

DSI with hydrated lime can allow SO2 & HCl reduction for both industrial boilers and cement manufacturers. Depending on the application and the facilities goals, a High Reactivity Hydrate may allow better removal or lower costs. In cement scrubber towers, DSI gave comparable removal rates to feeding a liquid slurry of hydrated lime directly to the scrubber tower.

Revision Date:  5/7/2015

Tags:  221112 - Fossil Fuel 化石燃料, 327310 - Cement Manufacturing 水泥生, Mississippi Lime, Lime, MACT

 

Marty Dillon of Lhoist enumerated advantages of a unique lime product.

 

Sorbacal SPS is a lime hydrate which combines porosity and chemical treatment to provide much higher SO2 and HCl capture than alternatives. A number of trial and actual installations support the claim.

 

 

There was considerable discussion relative to balance of plant impacts. Marty cites information showing the at Sorbacal SPS results in lower pressure drop in baghouses and lower particulate emissions in precipitators than finely ground lime such as is provided by others. Curt Biehn of Mississippi Lime wanted more evidence. He cited papers showing that lime injection may enhance precipitator performance. He also pointed out that the lime reacts with acid gases to form larger particles.

Marty showed evidence that the Sorbacal greatly reduced the leachate potential of selenium and other air toxics, so there can be a positive benefit relative to landfill alternatives and cost.

Flue Gas Treatment Specialist, by Marty Dillion, Lhoist - HTH 5-7-15

Sorbacal SPS is a lime hydrate which combines porosity and chemical treatment to provide much higher SO2 and HCl capture than alternatives. A number of trial and actual installations support the claim.

Revision Date:  5/7/2015

Tags:  221112 - Fossil Fuel 化石燃料, 327310 - Cement Manufacturing 水泥生, Lhoist North America, Lime, MACT

The entire May 7 recording can be heard at: MACT Update     71 minutes

You will need to enter your nane and email address after clicking link to view recording.

MACT Update Webinar - Hot Topic Hour - May 7, 2015

There are unique site specific factors which are more important in MACT than in MATS. The reason is that in cement, brick and other industrial processes the material being processed may create more air toxics than the fuel. The special focus for this Hot Topic Hour was on dry sorbent injection. The use of hydrated lime was also discussed.

Revision Date:  5/7/2015