Purifier for the physical-chemical treatment of combustion gases and other gases containing polluting or noxious constituents

• US 3,933,450 A
• Filed: 02/05/1974
• Issued: 01/20/1976
• Est. Priority Date: 02/07/1973
• Status: Expired due to Term

• Current Assignee: Emile Henri Gabriel Percevaut
• Original Assignee: Emile Henri Gabriel Percevaut
• Inventors: Percevaut, Emile Henri Gabriel
• Primary Examiner(s): Lutter, Frank W.
• Assistant Examiner(s): Cuchlinski, Jr., William
• Application Number:
  US05/439,944
• Time in Patent Office: 714 Days
• Field of Search: 55/223, 55/226, 55/228, 55/235, 55/238, 55/257, 55/260, 55/319, 55/336, 55/337, 55/440, 55/462, 55/463, 261/79 A, 261/115, 261/116, 23/277 R
• US Class Current: 96/319
• CPC Class Codes: B01D 47/06 Spray cleaning
• CPC Class Codes: B01D 50/00 Combinations of methods or devices for separating particles from gases or vapours
• CPC Class Codes: B01D 53/34 Chemical or biological purification of waste gases

Abstract

An apparatus for the treatment of gases containing polluting or noxious constituents which comprises a washing and centrifuging chamber, means to spray a washing liquid, specific to the chemical reaction it is desired to obtain with the gas, means to augment the length of the path travelled by the gas-liquid droplet mixture and promote the chemical reaction between the gas and liquid, means to separate the gas and liquid and recover both the gas and liquid.

Claims

1. A purifier of the cyclone-washer type for treating gases containing polluting or noxious constituents comprising:

a cylindrical wall concentric about a vertical axis defining a first chamber therein,

inlet duct means communicating with said first chamber through which gases to be treated can enter said first chamber,

said inlet duct means being directed tangentially into said first chamber for swirling the gases entering within said first chamber in a first direction about said vertical axis,

spray means associated with said first chamber for spraying washing liquid droplets into the swirling gases in said first chamber for treating gases therein,

said cylindrical wall extending downwardly below said first chamber,

a ring of helicoidal blades positioned within said cylindrical wall in the lower part of said first chamber, said helicoidal blades projecting the swirling mixture of gases and liquid droplets downwardly from said first chamber within said cylindrical wall below said ring of blades,

a honeycomb structure of curved vanes positioned within said cylindrical wall below said ring of blades for increasing the length of the path traversed by said mixture of gases and liquid droplets,

a hopper at lower part of said cylindrical wall below said honeycomb structure for receiving the washing liquid, and

a central evacuation duct communicating with the region within said cylindrical wall below said honeycomb structure and extending upwardly along said axis.

2. A purifier of the cyclone-washer type for treating gases containing polluting or noxious constituents, as claimed in claim 1, in which:

said honeycomb structure is formed by two truncated conical honeycombs of curved vanes each concentric about said axis,

said truncated conical honeycombs being positioned with their small ends adjacent one to another.

3. A purifier of the cyclone-washer type for treating gases containing polluting or noxious constituents, as claimed in claim 1, in which:

a static turbine is located at the lower end of said central evacuation duct,

said turbine having a conical configuration with its narrow end extending downwardly,

said turbine including a plurality of deflecting blades directing the gases inwardly into the lower end of said evacuation duct in the same direction of swirling motion as the swirling direction of the gases entering said first chamber.

4. A purifier of the cyclone-washer type for treating gases containing polluting or noxious constituents, as claimed in claim 1, in which:

said honeycomb structure includes two truncated conical systems of curved vanes,

each of said truncated conical systems of curved vanes extending around said central evacuation duct, and

one of said truncated conical systems being positioned above the other.

5. A purifier of the cyclone-washer type for treating gases containing polluting or noxious constituents, as claimed in claim 4, in which:

one of said truncated conical systems of curved vanes is inverted with respect to the other.

6. A purifier of the cyclone-washer type for treating gases containing polluting or noxious constituents, as claimed in claim 4, in which:

the curved vanes in said two conical systems are arranged according to parallel planes superimposed and perpendicular to said vertical axis.

7. A purifier of the cyclone-washer type for treating gases containing polluting or noxious constituents, as claimed in claim 1, in which

said honeycomb structure includes a first and a second system of curved vanes,

each of said systems of curved vanes extending around said evacuation duct with said first system being positioned above said second system,

said first system of curved vanes defining entry faces directed in said first direction of swirling movement about said vertical axis and curving obliquely therefrom for producing forced wetting and contact of the gases and droplets striking violently against the walls of these oblique curved vanes, and

said second system of curved vanes defining entry faces oriented in a direction opposite to said first direction of swirling motion for causing the gas streams passing through said second system to turn into the opposite direction for producing a drying effect by agglomerating the sprayed liquid droplets.

8. A purifier of the cyclone-washer type for treating gases containing polluting or noxious constituents comprising:

a cylindrical wall concentric about an axis defining a first chamber therein,

inlet duct means communicating with said first chamber through which gases to be treated can enter said first chamber,

said inlet duct means being directed into said first chamber off from said axis for producing a gyratory movement about said axis of the gases within said first chamber,

spray means associated with said first chamber for spraying washing liquid droplets into the moving gases within said first chamber,

said cylindrical wall extending beyond said first chamber defining a second chamber,

a ring of blades positioned within said cylindrical wall between said first and second chambers for directing the gyratory moving mixture of gases and liquid droplets into said second chamber,

a honeycomb structure containing multiple oblique vanes positioned within said second chamber, said honeycomb structure including a first and a second system of vanes,

said first system of oblique vanes having their entry faces oriented in the direction of the gyratory motion of said mixture,

said second system of oblique vanes having their entry faces oriented in a direction opposite to said direction of gyratory motion,

a hopper positioned beyond said honeycomb structure for receiving the washing liquid, and

a central evacuation duct extending along said axis through said chambers, said evacuation duct communicating with the interior of said cylindrical wall beyond said honeycomb structure for carrying away the washed gases.