Process for generating power using renewable biomass

F - Mech Eng,Light,Heat,Weapons – 01 – K

Patent

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F01K 17/00 (2006.01)

Patent

CA 2538228

A process and apparatus are disclosed for generating electrical energy using grains or other renewable biomass as the fuel, and for producing fertilizer to grow subsequent crops. In the process, a biomass material is incinerated in a firebox of a boiler to power a first turbine to create electricity. An excess air flow is introduced into the firebox to increase NOx production. The oxidation area of the boiler is operated at a temperature exceeding about 2,000~F, and the flue gases are maintained in the high temperature environment for an increased residence time to increase NO, production. The flyash from the incinerated biomass is filtered from the flue gases exhausted from the boiler. The NO, is removed from the filtered flue gases and used to produce a nitrogen fertilizer. The nitrogen fertilizer is blended with the flyash to form a balanced fertilizer product which allows sustainable production of the biomass material.

Cette invention concerne un procédé et un dispositif permettant de produire de l'énergie électrique en utilisant comme combustible des grains ou autres formes de biomasse et de produire des engrais pour des cultures ultérieures. Un matériau de biomasse est incinéré dans le foyer d'une chaudière qui entraîne une turbine produisant de l'électricité. Un flux d'air excédentaire est introduit dans le foyer pour augmenter la production de NOx,. La zone d'oxydation de la chaudière est soumise à une température de plus de quelque 2 000 ·C, cependant que les gaz de carneau sont maintenus dans cet environnement à haute température pendant une période prolongée de manière à accroître la production de NO. Les cendres volantes dégagées par la biomasse incinérée sont extraites par filtration des gaz de carneau. L'azote est extrait des gaz de carneau filtrés et utilisé pour la fabrication d'un engrais azoté. Mélangé aux cendres volantes, cet engrais azoté fourni une engrais équilibré autorisant une production durable de matériau de biomasse.

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