Passamaquoddy Technology Recovery Scrubber{trademark} process update

Conference · Sat Dec 31 00:00:00 EST 1994

OSTI ID:234015

Young, G L ^[1]

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1. Passamaquoddy Technology, Portland, ME (United States)

Prior to installation of the Passamaquoddy Technology Recovery Scrubber{trademark} (Recovery Scrubber), the Dragon Products Company Inc. cement plant (Dragon) in Thomaston, Maine landfilled about 250 tons per day of cement kiln dust (CKD) because of elevated potassium levels. Now the Recovery Scrubber uses alkaline CKD to react with and remove acidic components from exhaust gas thus renovating the CKD for reuse as feedstock in the cement plant. Soluble potassium salt products are recovered for sale by using waste heat from the exhaust gas for evaporation, concentration, and crystallization of the dissolved salts. Testing has demonstrated that the Recovery Scrubber removes over 90% of the SO{sub 2} and over 95% of the HCl from flue gas. In addition, stack testing has demonstrated a particulate emission level of below 15 mg/NM{sup 3} (0.005 grains per DSCF). System components, start-up problems and solutions, input and output material analyses, and exhaust gas scrubbing data will be briefly reviewed. A short discussion of the recent EPA Report to Congress (RTC) on CKD and the Report`s implications, as it relates to the Recovery Scrubber, is also presented.

• OSTI ID: 234015
• Report Number(s): CONF-9404294-; TRN: IM9624%%119
• Resource Relation: Conference: Waste combustion in boilers and industrial furnaces, 1994, Kansas City, MO (United States), 20-22 Apr 1994; Other Information: PBD: 1994; Related Information: Is Part Of Waste combustion in boilers and industrial furnaces; PB: 326 p.
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
CEMENT INDUSTRY
SCRUBBERS
POTASSIUM COMPOUNDS
RECYCLING
SULFUR DIOXIDE
AIR POLLUTION CONTROL
HYDROCHLORIC ACID
PARTICULATES
DUSTS
WASTE PRODUCT UTILIZATION
ADSORBENTS
EXHAUST GASES
WASTE HEAT UTILIZATION
TECHNOLOGY ASSESSMENT
WASTE MANAGEMENT
CRYSTALLIZATION