Method for filtration of gas effluents from an industrial installation

Patent metadata

Field	Value
Publication number	US-9295941-B2
Application number	US-201313737423-A
Country	US
Kind code	B2
Filing date	Jan 9, 2013
Priority date	Jan 10, 2012
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

A method for filtration of harmful gas effluents from an industrial installation including the steps of providing a gas effluent from an industrial installation, the gas effluent including a mixture of gases; filtering the harmful, elements from the gas effluent by membrane separation through a plurality of membranes, the membrane separation being achieved by sifting, sorption and/or diffusion, each membrane being adapted for filtering a specific harmful element; sorting the filtered harmful elements and storing them in separate storage reservoirs, and discharging the processed gas effluent to the atmosphere.

First claim

The invention claimed is:

1. A method for filtering gas effluents from an industrial installation comprising the following steps:
providing from an industrial installation a gas effluent comprising a mixture of gases;
filtering harmful elements from the gas effluent by sifting, sorption and/or diffusion membrane separation through a plurality of membranes each with a tubular geometry, an inner wall, an outer wall, pores varying in dimension radially and axially, and dimensions of the pores decreasing in the direction of effluent gas flow, with each membrane filtering a specific harmful element of the harmful elements to obtain filtered specific harmful elements and processed gas effluent with a purification coefficient greater than 100;
sorting the filtered specific harmful elements and storing the filtered specific harmful elements in separate storage reservoirs; and
discharging the processed gas effluent.

2. The method according to claim 1 , wherein the gas effluent provided comprises fumes from an industrial installation.

3. The method according to claim 1 , wherein the gas effluent provided comprises fumes from an industrial installation during operation.

4. The method according to claim 1 , wherein the gas effluent provided is extracted from a ventilation system.

5. The method according to claim 1 , wherein the gas effluent provided comprises fumes from a fire.

6. The method according to claim 1 , wherein the gas effluent provided comprises components from fission products.

7. The method according to claim 1 , wherein the gas effluent provided has a temperature greater than 40° C.

8. The method according to claim 1 , wherein the gas effluent provided has a processing flow rate greater than 1 kg/s.

9. The method according to claim 1 , wherein the gas effluent provided has a pressure of more than 1 bar.

10. The method according to claim 1 , wherein said storage reservoirs are gas storage reservoirs containing zeolites.

11. The method according to claim 1 , wherein the membranes are formed of ceramic, aramid fiber and/or a polymer.

12. The method according to claim 1 , wherein the method is operable at a pressure of 1.5 bars or greater, without use of energy external from that of the industrial installation.

Assignees

• Alstom Technology Ltd

Inventors

• Chantereau Philippe

Classifications

• B01D2258/06

  Polluted air · CPC title

• G21F9/02

  Treating gases · CPC title

• B01D53/226 Primary

  in serial connexion · CPC title

• B01D2325/022

  Asymmetric membranes · CPC title