Vapor relief strainer with cleaner

Patent metadata

Field	Value
Publication number	US-11083985-B2
Application number	US-201815874141-A
Country	US
Kind code	B2
Filing date	Jan 18, 2018
Priority date	Jan 20, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A vapor relief strainer cleaning assembly comprises a turbine and dislodger assembly, wherein the turbine is configured to move a dislodger assembly disposed within a vapor screen relief vessel. Exemplary dislodger assemblies are configured to be powered by vapor or gas and to use excess vapor or gas optionally to dislodge non-condensable contaminants from the filter screen or to facilitate contaminant dislodgement from the inner wall of the filter screen.

First claim

What is claimed is:

1. A vapor relief strainer cleaning assembly comprising:
a housing, wherein an inner wall of the housing defines a chamber;
a filter screen disposed within the chamber, wherein the filter screen has an inner wall and an outer surface, and wherein the inner wall of the filter screen is configured to collect a fibrous non-condensable contaminant collected on the inner wall of the filter screen from vapor passing through the filter screen in a direction from the inner wall of the filter screen to the outer surface;
a dislodger assembly disposed within the chamber, the dislodger assembly configured to clean at least a portion of the fibrous non-condensable contaminant collected on the inner wall of the filter screen, the dislodger assembly comprising:
a shaft having a first axial end distally disposed from a second axial end;
at least one dislodger support extending outwardly from the shaft, wherein the at least one dislodger support engages a dislodger, and wherein the dislodger is disposed adjacent to and in contact with the inner wall of the filter screen; and
at least one discharge support extending outwardly from the shaft, wherein the at least one discharge support engages a discharge arm; and

a lid assembly comprising:
a turbine housing having walls, wherein the walls of the turbine housing define a turbine chamber, a turbine vapor inlet, a first turbine vapor outlet, and a second turbine vapor outlet, wherein the turbine chamber fluidly communicates with the turbine vapor inlet, the first turbine vapor outlet, and the second turbine vapor outlet; and
a turbine comprising paddles extending outwardly from a turbine hub, wherein the turbine hub is a portion of the shaft extending into the turbine chamber, and wherein the turbine is configured to be disposed in the turbine housing,
wherein the dislodger assembly is coupled to the shaft such that rotation of the turbine causes rotation of the dislodger assembly.

2. The vapor relief strainer cleaning assembly of claim 1 , wherein the at least one discharge support is hollow, wherein the discharge arm is hollow, wherein the discharge arm has areas defining an exhaust opening, and wherein the at least one discharge support fluidly communicates with the discharge arm.

3. The vapor relief strainer cleaning assembly of claim 2 , wherein the shaft is a hollow shaft having areas defining a shaft inlet upstream of the second axial end, wherein the second turbine vapor outlet is configured to fluidly communicate with the shaft inlet, and wherein the hollow shaft fluidly communicates with the at least one discharge support.

4. The vapor relief strainer cleaning assembly of claim 3 , wherein the discharge arm further comprises areas defining multiple exhaust openings, wherein at least one exhaust opening of the multiple exhaust openings is disposed at an angle relative to a radial line extending from a center of rotation of the hollow shaft.

5. The vapor relief strainer cleaning assembly of claim 1 wherein the at least one discharge support comprises multiple discharge supports, wherein the multiple discharge supports are hollow.

6. The vapor relief strainer cleaning assembly of claim 5 , wherein each multiple discharge support comprises a width, and wherein the width of each discharge support is greater than the width of an adjacent discharge support as a distance increases between the discharge support and a shaft inlet upstream of the second axial end.

7. The vapor relief strainer cleaning assembly of claim 1 wherein the at least one dislodger support comprises multiple dislodger supports, wherein a spring is disposed between at least one dislodger support of the multiple dislodge supports and the dislodger.

8. The vapor relief strainer cleaning assembly of claim 7 further comprising multiple springs, wherein a spring of the multiple springs is disposed between each of the multiple dislodger supports and the dislodger.

9. The vapor relief strainer cleaning assembly of claim 1 , wherein the dislodger comprises multiple dislodgers and the at least one dislodger support comprises multiple sets of dislodger supports extending outwardly from the shaft, wherein each set of the multiple sets of dislodger supports engages at least one dislodger of the multiple dislodgers.

10. The vapor relief strainer cleaning assembly of claim 1 , wherein the at least one discharge support comprises multiple discharge arms and multiple sets of discharge supports extending outwardly from the shaft, wherein each set of the multiple sets of discharge supports engages one of the multiple discharge arms.

11. The vapor relief strainer cleaning assembly of claim 1 further comprising:
a turbine vapor outlet conduit engaging the turbine housing and fluidly communicating with the first turbine vapor outlet, and
a throttling valve disposed downstream of the turbine vapor outlet conduit and configured to fluidly communicate with the turbine vapor outlet conduit.

12. The vapor relief strainer cleaning assembly of claim 1 , wherein the filter screen is disposed between the dislodger assembly and the inner wall of the housing.

13. The vapor relief strainer cleaning assembly of claim 1 further comprising an external conduit disposed along the at least one discharge support and the discharge arm, wherein the external conduit fluidly communicates with the turbine chamber and fluidly communicates with a housing outlet conduit through the filter screen.

14. The vapor relief strainer cleaning assembly of claim 1 , wherein the dislodger is selected from a group consisting essentially of: a scraper, a brush, a rake, a sponge, a rag, a pipe cleaner, bristles, a device configured to physically contact and dislodge the fibrous non-condensable contaminant from the filter screen, and a device configured to use an intermediate medium to dislodge the fibrous non-condensable contaminant from the filter screen.

Assignees

• Andritz Inc

Inventors

• Nellis Walter E

Classifications

• B01D46/681

  by scrapers, brushes or the like · CPC title

• B01D29/6476 Primary

  with a rotary movement with respect to the filtering element · CPC title

• B01D46/2403 Primary

  characterised by the physical shape or structure of the filtering element · CPC title

• D21C11/06

  Treatment of pulp gases; Recovery of the heat content of the gases; {Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds} · CPC title

• D21C9/02

  Washing {; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents} · CPC title