Magnetic Ljungstrom filter

Patent metadata

Field	Value
Publication number	US-11633744-B2
Application number	US-202016987663-A
Country	US
Kind code	B2
Filing date	Aug 7, 2020
Priority date	Aug 7, 2020
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

A heat exchange apparatus for removing magnetic particulates from a gas stream, including a rotating element basket having a regenerative heat exchanger and at least one magnetic element. A method of removing magnetic particulates from a gas stream, including heating the regenerative heat exchanger during a first portion of a cycle as a segment of the rotating element basket passes through a first zone wherein contact is made with a flue gas thereby accumulating any magnetic particulates as they are attached to the magnetic element. Then cleaning a portion of the magnetic element during a second portion of the cycle. And cooling the regenerative heat exchanger and simultaneously heating an inlet air stream during a third portion of the cycle as the segment of the rotating element basket passes through a third zone wherein fluidic contact is made with the air inlet stream.

First claim

What is claimed is:

1. A heat exchange apparatus for removing magnetic particulates from a gas stream, comprising:
a rotating element basket comprising a regenerative heat exchanger and at least one magnetic element,
a first zone wherein fluidic contact may be made with a flue gas stream, thereby heating the regenerative heat exchanger and accumulating at least a portion of any magnetic particulates present therein as they are attached to the at least one magnetic element,
a second zone wherein the at least one magnetic element may be cleaned, and
a third zone fluidic contact may be made with an air inlet stream, thereby cooling the regenerative heat exchanger and simultaneously heating the inlet air stream.

2. The apparatus of claim 1 , further comprising a fourth zone the at least one magnetic element may be further cleaned.

3. The apparatus of claim 1 , wherein the at least one magnetic element comprises a heat transfer matrix that is fabricated from magnetic material.

4. The apparatus of claim 1 , wherein the at least one magnetic element is cleaned by one or more procedure selected from the group consisting of: mechanically, pneumatically, hydraulically, or acoustically.

5. A method of removing magnetic particulates from a gas stream, comprising a rotating element basket comprising a regenerative heat exchanger and at least one magnetic element, the method comprising:
heating the regenerative heat exchanger during a first portion of a cycle as a segment of the rotating element basket passes through a first zone wherein fluidic contact is made with a flue gas stream thereby accumulating at least a portion of any magnetic particulates present therein as they are attached to the at least one magnetic element,
cleaning at least a portion of the at least one magnetic element during a second portion of the cycle as the segment of the rotating element basket passes through a second zone, and
cooling the regenerative heat exchanger and simultaneously heating an inlet air stream during a third portion of the cycle as the segment of the rotating element basket passes through a third zone wherein fluidic contact is made with the air inlet stream.

6. The method of claim 5 , further comprising cleaning at least a portion of the at least one magnetic element during a fourth portion of the cycle as the segment of the rotating element basket passes through a fourth zone.

7. The method of claim 5 , wherein the at least one magnetic element comprises a heat transfer matrix that is fabricated from magnetic material.

8. The method of claim 5 , wherein the at least one magnetic element is cleaned by one or more procedure selected from the group consisting of: mechanically, pneumatically, hydraulically, or acoustically.

Assignees

• Air Liquide Large Ind Us Lp

Inventors

• Miller Gary D

Classifications

• B03C1/0335 Primary

  using coils · CPC title

• F23L15/04

  Arrangements of recuperators · CPC title

• B03C1/12 Primary

  with magnets moving during operation; with movable pole pieces · CPC title

• B03C2201/20

  Magnetic separation of bulk or dry particles in mixtures · CPC title

• Y02E20/34

  Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery · CPC title