Fluidized-bed heat generator with improved means for ash removal and heat recovery
AssigneesCharbonnages de France, Institut Francais du Petrole
InventorsGuy Marlair, Alexandre Petrovic
Life of this patent
Estimating the term…
Abstract
A fluidized bed heat generator with improved collector for ash removal and heat recovery comprises a central hearth having a fluidization grid at its lower end. The side wall of the hearth is enclosed by a hollow peripheral enclosure to define an intermediate volume therebetween which is connected both to the upper part of the hearth and to fume tubes. These fume tubes extend through the peripheral enclosure and open into a fume exit conduit such that fumes and entrained ash from the hearth can be directed via the intermediate volume and the fume tubes to the fume exit conduit. Water is arranged to circulate within the peripheral enclosure around the hearth and fume tubes.
Claims11
A compact heat generator comprising:
- a vertical central hearth having a side wall, a bottom end with a fluidization grid, an upper wall,
- a peripheral hollow enclosure having a lower wall and an upper wall and enclosing at least a part of the side wall of said hearth between the level of said grid and the level of said upper wall, said enclosure defining with the side wall of said hearth a fumes evacuating intermediate volume, the upper part of said side wall having openings for the fumes entering from said hearth into said intermediate volume,
- said peripheral hollow enclosure containing a plurality of vertical tubes spaced apart and extending between said lower wall and said upper wall of said enclosure, the lower end of said tubes being in communication by means of an ash collection with the lower end of said intermediate volume,
- said peripheral hollow enclosure having a water inlet and a water outlet for circulation of water therethrough,
- a fume exit conduit supported above said hearth and said vertical tubes extending outside said upper wall of said enclosure and being connected to said fume exit conduit.
Dependencies are inferred from the claim text.