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POLYPHENYLENE OXIDE BASED SCRUBBER COMPONENTS

IP.com Disclosure Number: IPCOM000248366D
Publication Date: 2016-Nov-21
Document File: 7 page(s) / 38K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present disclosure thus provides a scrubber system for treating a flow of flue gases with pollutants therein with a flow of a fluid. The scrubber system may include a column member and a packed bed positioned within the column member for the flow of flue gases and the flow of fluid. The packed bed may include a polyphenylene oxide based material.

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Polyphenylene oxide based SCRUBBER components

TECHNICAL Field

[0001]   The present disclosure relates generally to combustion plant emissions control systems and more particularly relate to polyphenylene oxide based components for a wet scrubber system and the like used for the removal of gaseous pollutants in the flue gases flowing therethrough.  In particular, the wet scrubber system is useful for treating flue gases with PCDD/F.

BACKGROUND

[0002]   Waste-to-energy combustion plants often include a wet scrubber system for the removal of gaseous pollutants and the recovery of condensation heat so as to improve overall plant efficiency.  Specifically, a portion of the heat of the hot flue gases produced in the combustion process may be recovered and applied for useful work.  A common means of removing pollutions and recovering such heat is through a packed bed scrubber and the like.  The pollutants may include polyhalogenated compounds including polychlorinated dibenzo-p-dioxines and dibenzofurans (PCDD/F), i.e., dioxins and the like.  Although most PCDD/F’s may be captured by an upstream fabric filter, some amount may reach the wet scrubber system during periods of high concentrations such as during start-up. 

[0003]   Generally described, the hot flue gases may enter the scrubber at the bottom thereof and rise through a packed bed while a fluid flows downward therethrough so as to remove the gaseous pollutants and to exchange heat with the flue gases.  The packed bed is often a random filling or a structured bed made out of a polyolefin such as polypropylene and the like.  The now warmed fluid then may be applied for any useful purpose such as flowing through a heat exchanger.

[0004]   One of the drawbacks with the use of a packed bed wet scrubber is that the polypropylene or other type of polyolefin packing material may lose mechanical stability and distribution capability at high operating temperatures.  Specifically, the polypropylene or other material may deform under its own weight and the weight of the scrubber liquid above about 70 to 80 degrees Celsius or so.  The channels for contact between the gas and the liquid may be damaged and thus may result in a decreased scrubbing efficiency and a decreased heat transfer efficiency.

SUMMARY

[0005]   The present disclosure thus provides a scrubber system for treating a flow of flue gases with pollutants therein with a flow of a fluid.  The scrubber system may include a column member and a packed bed positioned within the column member for the flow of flue gases and the flow of fluid.  The packed bed may include a polyphenylene oxide based material.

[0006]   The present disclosure further provides a method of removing pollutants from a flow of flue gases in a scrubber system.  The method may include the steps of flowing the flue gases through a packed bed with a polyphenylene oxide based material therein, flowing a fluid through the packed bed, absorbing pollutants in the flue gases in...