Abstract A device for removing noxious substances discharged from chimneys and the like, which includes a pair of filter units disposed in each of two flues defined in the chimney, so as to be selectively put into service by a flip over vane. Each flue has two filter sections: a first section where a viscous liquid cleanser for dust and other particles of the discharge is intermittently sprayed unto a porous filler disposed therein when the flue is in use, while a washing liquid is sprayed onto the filler for washing said particles away from the filler together with the liquid cleanser when the flue is not in use; and a second section where a neutralizer is sprayed to the porous filler disposed therein for neutralizing acidic or basic components of the discharge when the flue is in use. Staggered Vshaped troughs are provided below each section to catch liquid draining from the respective fillers for recirculation while permitting flow of flue gas up the chimney.
Inventors
👤 K Yamada
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-03 23:22
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
59 words
A device according to claim 1, wherein said exhaust gas contains sulfurous acid and said neutralizing liquid contains caustic soda, so that sodium hydrogen sulfite is produced by neutralization, and wherein said removing means in said second circulating means comprises means for separating said sodium hydrogen sulfite from said liquid received by said troughs below said upper filter units.
Claim 2
Dependent Claim
67 words
A device according to claim 1, wherein said chimney further comprises a plurality of water nozzles located in the chimney below said valve means, so as to inject water to the exhaust gas at such a rate that the injected water completely evaporates in the exhaust gas so as to reduce the temperature of the exhaust gas to a level suitable for treatments at said filter units.
Claim 3
Dependent Claim
53 words
A device according to claim 1, wherein said filter means of the filter units comprises a plurality of sponge-like filter mesh members made by knitting fine flattened corrosion-resistant linear elements, said mesh members being grouped in two blocks in each of said flues said blocks comprising respectively said upper and lower filter units.
Claim 4
Dependent Claim
21 words
A device according to claim 4, wherein said linear members are stainless steel wires which are bound together in brush form.
Claim 5
Dependent Claim
26 words
A device according to claim 4, wherein said linear members are stainless steel wires which are woven into the form of mesh with a high porosity.