Apparatus and method for treating exhaust gas
View Patent ↗Presented is a method and apparatus for treating an exhaust gas. A series of filters and conditioning units are used to separate and extract various substances from the exhaust gas, typically originating from an industrial process. In an exemplary embodiment, a cyclone filter, a ceramic filter, a baghouse filter, and a pair of gas conditioners are used to initially separate and extract iron-rich dust from an exhaust gas and then extract zinc from the gas.
1. An apparatus for the treatment of exhaust gases from an industrial process, comprising:
a first gas conditioner for receiving and conditioning an exhaust gas and creating a first conditioned gas;
a cyclone filter in fluid communication with and downstream of said first gas conditioner to remove dust from the first conditioned gas;
a ceramic filter in fluid communication with and downstream of said cyclone filter to remove additional dust from the exhaust gas;
a second gas conditioner in fluid communication with said ceramic filter for receiving and further conditioning the exhaust gas, creating a twice conditioned exhaust gas; and,
a baghouse filter for receiving and further conditioning said exhaust gas downstream of said second gas conditioner remove a substance from the twice conditioned exhaust gas.
2. An apparatus according to claim 1 , wherein said dust comprises an iron-rich dust and said substance comprises zinc.
3. An apparatus according to claim 1 , wherein the first gas conditioner conditions said gas to at least about 1200 degrees Celsius.
4. An apparatus according to claim 2 , wherein said cyclone filter removes up to 50% by weight of the dust contained in the first conditioned gas.
5. An apparatus according to claim 4 , wherein said cyclone filter removes said dust without zinc condensation.
6. An apparatus according to claim 2 , wherein said ceramic filter removes up to 90% by weight of the dust passing therethrough.
7. An apparatus according to claim 6 , wherein said ceramic filter removes dust without zinc condensation.
8. An apparatus according to claim 1 , wherein said second gas conditioner conditions the exhaust gas to the operating temperature range of the baghouse filter.
9. An apparatus according to claim 1 , further comprising a collector connected to said cyclone filter for receiving dust from said cyclone filter.
10. An apparatus according to claim 1 , further comprising a collector connected to said ceramic filter for receiving dust from the ceramic filer.
11. An apparatus according to claim 1 , further comprising a collector connected to said baghouse filter for receiving said substance from the baghouse filter.
12. An apparatus according to claim 1 , wherein the first and second gas conditioners are water atomizers.
13. An apparatus for the treatment of exhaust gases comprising:
a first gas conditioner for initially conditioning an exhaust gas comprising dust and zinc, said first gas conditioner comprising a first water spreader;
a cyclone filter in fluid communication with and downstream of said first water spreader, said cyclone filter removing dust from the exhaust gas without causing condensation of the zinc;
a ceramic filter in fluid communication with and downstream of said cyclone filter, said ceramic filter removing dust from the exhaust gas without causing condensation of the zinc;
a second gas conditioner in fluid communication with and for receiving and further conditioning said exhaust gas downstream from said ceramic filter, said second gas conditioner further comprising a second water spreader;
a baghouse filter in fluid communication with and downstream of said second water spreader, said baghouse filter removing zinc from the exhaust gas.
14. An apparatus according to claim 13 , wherein said first gas conditioner conditions the gas to a temperature of at least about 1200 degrees Celsius.
15. An apparatus according to claim 13 , wherein said cyclone filter is designed to remove up to 50% by weight of the initial dust contained in the exhaust gas.
16. An apparatus according to claim 13 , wherein said ceramic filter removes up to 90% by weight of the dust passing therethrough.
17. An apparatus according to claim 13 , wherein said second gas conditioner conditions the exhaust gas to the operating range of the baghouse filter.
18. An apparatus according to claim 13 , further comprising a collector for receiving dust from said cyclone filter.
19. An apparatus according to claim 13 , further comprising a collector for receiving dust from said ceramic filter.
20. An apparatus according to claim 13 , further comprising a collector for receiving zinc from said baghouse filter.
21. A method of treating an exhaust gas comprising:
introducing the exhaust gas into a first conditioning unit and conditioning the exhaust gas to provide a conditioned exhaust gas;
introducing the conditioned exhaust gas to a cyclone filter in fluid communication with and located downstream of the first conditioning unit;
introducing the conditioned exhaust gas to a ceramic filter in fluid communication with and located downstream of the cyclone filter;
introducing the conditioned exhaust gas into a second conditioning unit in fluid communication with and downstream of the ceramic filter and conditioning the conditioned exhaust gas for a second time;
introducing the twice conditioned exhaust gas to a baghouse filter in fluid communication with and downstream of the second conditioning unit.