Patent ID: 9737849
Date: 2017-08-22
CPC Classifications: B01D,C05C,C05D,F23J,Y02C,Y02E,Y02P

Claim:
1. Apparatus for cleaning stack gases comprising: (a) a first catalytic flow-through bed of natural calcium zeolite with a porosity of a total surface area of not greater than 1200 m (b) a second catalytic flow-through bed of a blend of natural sodium zeolite and natural calcium zeolite of a porosity with a total surface area of not greater than 1200 m (c) a third catalytic flow-through bed of natural calcium zeolite with a porosity of a total surface area not greater than 1200 m (d) the exhaust stack adapted to provide a gas flow selected from the group consisting of volatiles from combustion of coal or combustion of natural gas or from a cement kiln sequential through the first catalytic flow-through bed, the second catalytic flow-through bed, and the third catalytic flow-through bed each catalytic bed collecting solids and providing stack gases exiting the third catalytic flow-through bed with at least 70% reduction in sulfur oxides, nitrogen oxides, and carbon oxide; and (e) the first catalytic flow-through bed, the second catalytic flow-through bed, and the third catalytic flow-through bed are each provided on rotating disks such that the stack gases can be continually passed through the first catalytic flow-through bed, the second catalytic flow-through bed, and the third catalytic flow-through bed to provide collection of solids and/or liquids while other portions or beds of like compositions are purged with nitrogen to collect the solids and/or liquids from the beds.