Patent ID: 7790126
Filing Date: 2010-09-07
Classification: B01D,Y10S

Abstract:
1. A method for cleaning exhaust gases of a glass melting process wherein a raw material for production of the glass is charged to a glass furnace and molten glass is removed from the glass furnace, wherein said raw material includes SiO 2 and one or more materials selected from the group consisting of boron, arsenic, and metal compounds, wherein said glass furnace is at least partially heated by means of hot combustion gases, wherein the exhaust gases of the glass melting process originate from one or more materials selected from the group consisting of said combustion gases and the raw material, wherein the exhaust gases include one or more materials selected from the group consisting of CO 2 , O 2 , H 2 O, N 2 , NO x , compounds escaping from the raw material and compounds formed from the raw material, wherein the exhaust gases of the glass melting process are essentially freed of pollutant components in at least two stages in a moving bed reactor, said moving bed reactor including at least one material selected from the group consisting of a catalytically active adsorbent and an absorbent, whereby in the immediate oncoming flow area of said moving bed reactor, at least one catalyst damaging pollutant component in the exhaust gasses that damage catalyst and which originate from the raw material is at least partially bound by absorption and particulate components in said exhaust gasses are at least partially adhesively removed in a first stage of said moving bed reactor, and catalytic removal of nitrogen oxides in said exhaust gasses is performed to a great extent in a second stage that is positioned in a layer area adjacent to the immediate oncoming flow area, and one or more non-catalyst damaging pollutant components that are present in said exhaust gasses are at least partially removed by absorption in said adjacently positioned layer area.