Method and arrangement for controlling the draft effect of a flue duct upon an upstream exhaust gas cleaning system
AssigneeSteag Energy Services GmbH
InventorHermann Brüggendick
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for reducing a chimney draught in an upstream connected exhaust gas cleaning system consisting in immersing a chimney tube (1; 1′) provided with the open top part thereof in a bath in such a way that a liquid (condensate) collected therein forms a liquid barrier closing the exhaust gas input end of the chimney tube with respect to environment. In order to remove the exhaust gases from the upstream connected exhaust gas cleaning system, at least one part of the chimney tube cross section is exposed by lowering the liquid level under the edge thereof. Said lowering of the liquid level can be carried out by lowering the bath.
Claims15
A method of reducing a draft effect of a flue duct upon an upstream exhaust gas cleaning system, including the steps of:
- extending a downwardly open first flue duct, having a second flue duct disposed thereon for connection to an upstream exhaust gas cleaning system, into a vat so as, with the aid of a liquid that has collected in the vat, to form a liquid barrier that is adapted to close off a flue gas end of said first flue duct relative to the environment;
- relieving the upstream exhaust gas cleaning system from the draft effect of the first flue duct by lowering the level of the liquid in the vat below an edge of the first flue duct to expose at least a portion of a cross-section of the first flue duct;
- using a trough as the vat, wherein the trough is associated with a lower edge of said flue draft, and wherein the trough outwardly delimits a discharge plate;
- adjusting a depth of immersion of said first flue duct into the trough by vertically positioning the trough.
An arrangement for reducing the draft effect of a flue duct upon an upstream exhaust gas cleaning system, comprising:
- a vat in which liquid is to be collected, wherein a downwardly open first flue duct, having a second flue duct disposed thereon for connection to an upstream exhaust gas cleaning system, is adapted to be immersed in liquid collected in said vat to form a liquid barrier that is adapted to close off a flue gas end of said first flue duct relative to the environment;
- and
- means for lowering the level of the liquid in said vat below an edge of said first flue duct to thereby expose at least a portion of a cross-section of said first flue duct in order to relieve the upstream exhaust gas cleaning system from the draft effect of the first flue duct;
- said vat is embodied as a trough that is connected in a gas tight manner with a downwardly inclined discharge plate to form an assembly;
- said discharge plate assembly is supported on said first flue duct by means of a support apparatus, the length of which is adapted to be varied.
Dependencies are inferred from the claim text.