| 摘要 |
<p>APPLICANT: Karl Sigurd Herman HULTGREN TITLE: AN ARRANGEMENT IN COMBUSTION CHAMBERS FOR BURNING SOLID FUEL The present invention relates to an arrangement in combustion chambers for burning solid fuel, such as wood, wood chips, pellets, coal and sundry waste, with recirculation combustion and including a combustion chamber with fire bars arranged in its lower part, a convection section, a flue gas outlet and normally a fan for supplying alternatively air or an air flue gas mixture. What is primarily characterizing for the invention in this arrangement is that it further contains a first supply conduit from the pressure side of the fan arranged with its outlet in a pressure chamber situated under the fire bars in the combustion chamber, a second supply conduit from the pressure side of the fan to the combustion chamber, the outlet of this conduit being arranged above the fire bars and having the shape of a gap arranged completely or partially surrounding the fire in the combustion chamber, and there possibly also being a return conduit connected to the suction side of the fan for recirculating flue gases from the flue gas outlet to the combustion chamber.</p> |
