Gas separation – With nonliquid cleaning means for separating media – Solid agent cleaning member movingly contacts apparatus
Patent
1992-01-03
1994-01-25
Hart, Charles
Gas separation
With nonliquid cleaning means for separating media
Solid agent cleaning member movingly contacts apparatus
55345, 417151, 417152, B01D 4512
Patent
active
052812456
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
This invention relates to a flue gas treatment apparatus and also to a flue gas treatment system, both of which are suitable for use in the treatment of flue gas in which a fine solid particulate contaminant and a gaseous air pollutant are mixed.
2. Background Art
In flue gas, substances present in a solid form, such as dust, are generally mixed in with aditional air pollutants present in a gaseous form, for example, NO.sub.x.
Known conventional removal means for fine solid particles in flue gas include cyclones making use of centrifugal force and bag filters relying upon filtration.
They are all employed to separate and collect only fine solid particles from flue gas. They cannot eliminate gaseous air pollutants so most of such air pollutants are released into the atmosphere.
To remove such gaseous air pollutants, a chemical facility is additionally required to use an aqueous solution which can absorb such air pollutants. In addition to a reaction tank in which the gaseous air pollutants react with the aqueous solution, this chemical facility is also equipped with an apparatus for recirculating the aqueous solution within the facility, an apparatus for feeding a fresh aqueous solution, an apparatus for treating the aqueous solution, etc.
To treat flue gas which contains a contaminant present in a solid form and an air pollutant in a gaseous form, a system constructed with a combination of a dust collector, such as a cyclone, and a chemical facility has heretofore generally been employed.
Such a conventional flue gas treatment system is, however, accompanied by the drawback that a very large chemical facility is required. furthermore, the need to take into consideration corrosion resistance to the aqueous solution leads to a higher initial cost for the system, and the need for supply and treatment of the aqueous solution results in higher running cost.
In industrial fields where flue gas occurs in a huge volume during the course of manufacture of a product or the like, such as in the chemical and steel industries, there has hence been a strong desire for the development of a flue gas treatment system which can eliminate gaseous air pollutants without any chemical facility.
For industrial fields using an apparatus such as a small incinerator or boiler, such a flue gas treatment system is too large and too expensive. It is the current situation that, despite the immense concern about the pollution problem, no flue gas treatment system or apparatus is installed.
DISCLOSURE OF THE INVENTION
The present invention has been developed with the foregoing conventional problems in mind. An object of the present invention is, therefore, to provide an apparatus, system and method for the treatment of flue gas, which do not require any chemical facility and thus high initial and running costs.
To achieve the above object, this invention provides a flue gas apparatus characterized in that a gas suction portion for drawing flue gas therethrough is formed in a conical cylinder downwardly reduced in diameter, at least one jet nozzle is provided adjacent the gas suction port to jet out a compressed gas along an inner peripheral wall of the conical cylinder, and a discharge port is formed in a lower part of the conical cylinder.
To attain the above object, this invention also provides another flue gas treatment apparatus characterized in that the apparatus has an conical inner cylinder downwardly reduced in diameter, at least one jet nozzle for jetting out a compressed gas along an inner peripheral wall of an upper part of the conical cylinder and an outer cylinder enclosing at least the upper part of the conical inner cylinder, a gas suction portion for drawing flue gas therethrough is formed in the outer cylinder, a clearance is formed between the upper part of the conical inner cylinder and the outer cylinder to guide the flue gas, which has flowed into the outer cylinder, into the conical inner cylinder, and a discharge port is formed in a lower part of the conical inner cylinder.
To ful
REFERENCES:
patent: 3826273 (1974-07-01), Brown
patent: 3830064 (1974-08-01), Byonicki
patent: 4278405 (1981-07-01), Angle
patent: 4348364 (1982-09-01), Gartside et al.
patent: 4580948 (1986-04-01), Schmidlin
patent: 4820131 (1989-04-01), Johnson
patent: 4846617 (1989-07-01), Ehrhordt
Hart Charles
Sanko' Industry Corporation
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