Control of Volatile Organic Compounds Emissions from Manufacturing

air to reduce the air flow through the burner pods;
3. Installed plates upstream of the burners so that ductwork
matches burner dimensions;
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4. Cut slots in recycle duct to reduce exit velocities and
improve mixing with 0x0 waste gas;
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5. Instal led balancing dampers in augmenting (supplemental ) air
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plenums, top and bottom;
6. Installed balancing ddmpers in three of thekive sections of
the recycle duct transition; and
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7. Cut opening in the recirculation duct to reduce the outlet
velocities.
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March 1978
After the November changes were made, a field test was made in
December 1977, which revealed that the incinerator VOC destruction
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efficiency increased from 70.3 percent to 94.1 percent.
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However, it
still needed improvement. After much discussion and study the fol lowing
changes were made in March 1978:
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1. Took the recirculation fan out of service and diverted the
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excess forced draft air into the recircul ct;
2. Sealed off the 14-cm (5-112-in.) wide slots adjacent to the '
burner pods and removed the 1.3 cm (112-in.) s were i nstai 1 ed
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in November 1977;
3. Instal led vertical baffles between the bottdm ;ow of burner I
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pads to improve mixing;
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4. Instal led oerforated ~l ;tes between the 'five *rkcirculation
ducts for better waste gas distribution in the incinerator; and
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5. Cut seven 3-in. wide slots in the recyci'e duct for bettkr
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secondary air distribution.
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July 1978
After the March 1978 changes, a survey in April 1978, showed the'
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0x0 incinerator to be performing very well (VOC dlestruction efficiency
of 99.6 percent) but with a high superheat temperature of 450°C (8500~).
So, in July 1978, some stainless steel shields were installed over the
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superheater el ements to he1 p lower the superheat temperature. A
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