Filter unit having a filter cleaning nozzle associated with the filter unit and including a guide body
AssigneeNiro A/S
InventorsPer Simonsen, Ove Emil Hansen
Life of this patent
Estimating the term…
Abstract
A filter unit for filtering gas has at least one filter element with an outlet opening. A filter cleaning nozzle is located in a clean-gas chamber at a distance from the outlet opening and is connected to a source of pressurized primary cleaning gas via a control valve. Primary cleaning gas is ejected from an annular slot and along the outer side of a guide body located in the clean-gas chamber. The guide body is open to the secondary gas in the chamber.
Claims24
A filter unit for filtering gas, comprising at least one filter element having an outlet opening facing a clean-gas chamber, a filter cleaning nozzle, and a source of pressurized primary cleaning gas, wherein the filter cleaning nozzle is located in the clean-gas chamber at a distance from said outlet opening and is connected to the source of pressurized primary cleaning gas via a control valve;
- a guide body is located in the clean-gas chamber and has an outer surface;
- said nozzle has a nozzle opening for injection of primary cleaning gas onto a guide surface on the outer surface of the guide body;
- and the guide surface is open to secondary gas in the clean-gas chamber and directs said primary cleaning gas and entrained secondary gas toward the outlet opening of the filter, and wherein the nozzle opening is an annular slot which is delimited by an annular rim of a feeding pipe for primary cleaning gas and the guide body.
A filter unit for filtering gas, comprising at least one filter element having an outlet opening, a filter cleaning nozzle in a clean-gas chamber, and a source of pressurized primary cleaning gas, wherein the filter cleaning nozzle with a guide body is located at a distance from said outlet opening and is connected to the source of pressurized primary cleaning gas via a control valve;
- the guide body has an outer surface;
- said nozzle has a nozzle opening for ejection of primary cleaning gas along the outer surface of the guide body;
- said outer surface has a first portion with increasing diameter in the direction of the outlet opening of the filter element and said guide body has an end portion with decreasing diameter in the direction of the outlet opening of the filter element and in between the first portion and the end portion said guide body has a second portion with mainly constant diameter.
A filter unit for filtering gas, comprising at least one filter element having an outlet opening, a filter cleaning nozzle in a clean-gas chamber, and a source of pressurized primary cleaning gas, wherein the filter cleaning nozzle with a guide body is located at a distance from said outlet opening;
- the guide body has an outer surface;
- said nozzle has a nozzle opening for ejection of primary cleaning gas along the outer surface of the guide body;
- said guide body has a conical end portion with decreasing diameter in the direction of the outlet opening of the filter element;
- and the guide body has a trailing end and a longitudinal, through-going bore, for feeding a part of the primary cleaning gas to the trailing end.
Dependencies are inferred from the claim text.