Adjustable particle cooler for a circulating fluidized bed reactor
AssigneeGotaverken Energy AB
InventorAnders Wahlgren
Life of this patent
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Abstract
A method and a particle cooler for controlling the cooling effect in a circulating fluidized bed reactor. The method comprises regulating heat output from the particle cooler by varying the particle level in the cooler. The particle cooler is mounted in a fluidized bed reactor having a particle flow restrictor with fluidizing means between the flow restrictor and reaction chamber and provides the only particle flow passage between the restrictor and reaction chamber and is provided with internal cooling media tubes dispersed on different vertical levels. Particle flow regulating means is provided for maintaining the particle level within the cooler, which level is adjustable.
Claims17
In a reactor including a fluidized bed reaction chamber having an outlet, a particle separator means connected to the reaction chamber outlet for separating particles passing through the reaction chamber outlet, a particle outlet for the separator means, return conduit means for recycling particles from the separator means to the reaction chamber and a particle cooler for cooling particles from the separator means, the improvement comprising:
- a flow restrictor connected to the particle outlet of the separator means;
- fluidizing means operatively connected to said flow restrictor for fluidizing particles in said flow restrictor;
- an outlet for said flow restrictor;
- a particle cooler having an inlet connected to said flow restrictor outlet and an outlet connected to the return conduit means so that said particle cooler is in the only flow passage between said flow restrictor and reaction chamber;
- cooling media tubes disposed in spaced relationship in said particle cooler for cooling particles in said particle cooler;
- and
- particle flow regulating means for adjusting and maintaining a particle level in said particle cooler.
In a method for controlling the temperature of a reaction in a fluidized bed reaction chamber wherein particles in the exhaust from the reaction chamber are recycled through a particle cooler to the reaction chamber, the improvement comprising:
- regulating heat output from the particle cooler by regulating the particle level therein.
Dependencies are inferred from the claim text.