Particulate classification vessel having gas distributor valve for recovering contaminants from bed material
A multi-stage product gas generation system converts a carbonaceous material, such as municipal solid waste, into a product gas which may subsequently be converted into a liquid fuel or other material. One or more reactors containing bed material may be used to conduct reactions to effect the conversions. Unreacted inert feedstock contaminants present in the carbonaceous material may be separated from bed material using a portion of the product gas. A heat transfer medium collecting heat from a reaction in one stage may be applied as a reactant input in another, earlier stage.
1. A particulate classification vessel (A 1 A, A 1 B) having an interior (INA, INB) and comprising:
(i) a mixture input (A 5 A, A 5 AA);
(ii) a classifier gas input (A 6 A, A 6 AA) connected to a source of classifier gas (A 16 A, A 16 AA);
(iii) a bed material output (A 7 A, A 7 AA);
(iv) a contaminant output (A 9 A, A 9 AA); and
(v) a gas distributor valve (V 91 ) configured to separate the classifier interior (INA, INB) into a classifier zone (INA 1 ) and a gas distribution zone (INA 2 );
wherein:
the gas distributor valve (V 91 ) comprises a valve body ( 504 ) and a blade ( 502 ) slidable relative to the valve body ( 504 ); the blade ( 502 ) has perforations ( 514 ) at a first portion thereof;
an actuator ( 506 ) is connected to the blade ( 502 ) and configured to selectively slide the blade ( 502 ) between:
a closed position in which the perforations ( 514 ) are located within the vessel, between the classifier zone (INA 1 ) and a gas distribution zone (INA 2 ); and
an open position in which the perforations ( 514 ) are no longer located within the vessel, between the classifier zone (INA 1 ) and a gas distribution zone (INA 2 ).
2. The particulate classification vessel according to claim 1 , wherein:
the blade ( 502 ) further comprises a hole ( 516 ) at a second portion thereof, spaced apart from the first portion where the perforations are located; and
in the open position, the hole is located within the vessel, between the classifier zone (INA 1 ) and a gas distribution zone (INA 2 ).
3. The particulate classification vessel according to claim 1 , wherein a maximum size of the perforations ( 514 ) range from 10 to 100 microns.
4. The particulate classification vessel according to claim 1 , comprising:
a depressurization gas output (A 8 A, A 8 AA); and
a depressurization vent valve (V 12 A, V 12 AA) connected to the classifier depressurization gas output (A 8 A, A 8 AA) to selectively vent the vessel.
5. The particulate classification vessel according to claim 1 , comprising:
a mixture transfer valve (V 9 A, V 9 AA) configured to selectively control transfer of a mixture of bed material and inert feedstock contaminants to the interior (INA, INB) of the particulate classification vessel (A 1 A, A 1 B) via the mixture input (A 5 A, A 5 AA).
6. The particulate classification vessel according to claim 1 , comprising:
a classification gas transfer valve (V 10 A, V 10 AA) configured to selectively connect said source of classifier gas to the classifier gas input (A 6 A, A 6 AA).
7. The particulate classification vessel according to claim 1 , comprising:
a bed material riser recycle transfer valve (V 11 A, V 11 AA) configured to selectively control transfer of bed material from the interior (INA, INB) of the particulate classification vessel (A 1 A, A 1 B) via the bed material output (A 7 A, A 7 AA).
8. The particulate classification vessel according to claim 1 , comprising:
an inert feedstock contaminant drain valve (V 13 A, V 13 AA) configured to selectively remove contaminants from the interior (INA, INB) of the particulate classification vessel (A 1 A, A 1 B) via the contaminant output (A 9 A, A 9 AA).
9. The particulate classification vessel according to claim 1 , comprising:
a depressurization gas output (A 8 A, A 8 AA); and a depressurization vent valve (V 12 A, V 12 AA) connected to the classifier depressurization gas output (A 8 A, A 8 AA) to selectively vent the vessel;
a mixture transfer valve (V 9 A, V 9 AA) configured to selectively control transfer a mixture of bed material and inert feedstock contaminants to the interior (INA, INB) of the particulate classification vessel (A 1 A, A 1 B) via the mixture input (A 5 A, A 5 AA);
a classification gas transfer valve (V 10 A, V 10 AA) configured to selectively connect said source of classifier gas to the classifier gas input (A 6 A, A 6 AA);
a bed material riser recycle transfer valve (V 11 A, V 11 AA) configured to selectively control transfer of bed material from the interior (INA, INB) of the particulate classification vessel (A 1 A, A 1 B) via the bed material output (A 7 A, A 7 AA); and
an inert feedstock contaminant drain valve (V 13 A, V 13 AA) configured to selectively remove contaminants from the interior (INA, INB) of the particulate classification vessel (A 1 A, A 1 B) via the contaminant output (A 9 A, A 9 AA.
10. The particulate classification vessel according to claim 9 , comprising:
a master controller configured to operate the vessel in any one of a plurality of states, including:
(i) a first state in which all of said valves are closed;
(ii) a second state in which the mixture transfer valve (V 9 A, V 9 AA) is open and the remainder of said valves are closed, to allow said mixture to enter the vessel;
(iii) a third state in which the classification gas transfer valve (V 10 A,V 10 AA) and the bed material riser recycle transfer valve (V 11 A,V 11 AA) are open and the remainder of said valves are closed, to promote separation of said bed material from said mixture and recycling of separated bed material back into the first reactor;
(iv) a fourth state in which the depressurization vent valve (V 12 A, V 12 AA) is open and the remainder of said valves are closed, to allow the vessel to vent; and
(v) a fifth state in which the inert feedstock contaminant drain valve (V 13 A, V 13 AA) is open and the remainder of said valves are closed, to remove unreacted inert feedstock contaminants from the vessel.
11. In combination, a reactor ( 100 ) and the particulate classification vessel (A 1 A) of claim 1 , the reactor ( 100 ) comprising:
a reactor interior ( 101 ) having bed material and contaminants therein;
a particulate output (A 2 A) connected to a lower portion of the reactor interior ( 101 ) and connected to the mixture input (A 5 A) of the particulate classification vessel (A 1 A), the particulate output (A 2 A) configured to convey a mixture of bed material and contaminants within the reactor interior ( 101 ) to the particulate classification vessel (A 1 A).
12. The combination of claim 11 , wherein the reactor ( 100 ) further comprises:
a classified recycled bed material input (A 27 ) in fluid communication with an upper portion of the reactor interior ( 101 ); wherein:
the classified recycled bed material input (A 27 ) is connected to the bed material output (A 7 A) of the particulate classification vessel (A 1 A) and configured to receive recycled bed material from the particulate classification vessel (A 1 A).
13. In combination, a reactor ( 100 ) and two particulate classification vessels (A 1 A, A 1 B) in accordance with claim 1 , the reactor ( 100 ) comprising:
a reactor interior ( 101 ) having bed material and contaminants therein; and
one or more particulate outputs (A 2 A, A 2 AA) connected to a lower portion of the reactor interior ( 101 ) and configured to selectively convey a mixture of bed material and contaminants within the reactor interior ( 101 ) to exactly one of the particulate classification vessel (A 1 A, A 1 B) at any given time, via the mixture input (A 5 A, A 5 AA) of said exactly one particulate classification vessel (A 1 A, A 1 B).
14. The combination of claim 13 , wherein the reactor further comprises:
one or more classified recycled bed material inputs (A 27 , A 27 A) in fluid communication with an upper portion of the reactor interior ( 101 ), the one or more classified recycled bed material inputs (A 27 , A 27 A) configured to selectively convey recycled bed material into the reactor interior ( 101 ) from exactly one of plurality of particulate classification vessels (A 1 A, A 1 B) at any given time, via the bed material output (A 7 A, A 7 AA) of said exactly one particulate classification vessel (A 1 A, A 1 B).