Dual Bed Pyrolysis System and Method

Patent metadata

Field	Value
Publication number	US-2017189877-A1
Application number	US-201515313948-A
Country	US
Kind code	A1
Filing date	May 22, 2015
Priority date	May 23, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

A dual bed pyrolysis system may include a falling bed reactor employing a heat carrier particulate to pyrolyze biomass to create a pyrolysis product and a pyrolysis waste product. The dual bed pyrolysis system may also include a fluidized bed reactor. The fluidized bed reactor may accept the pyrolysis waste product including char and heat carrier particulate from the falling bed reactor. The fluidized bed reactor may combust the char in the presence of the heat carrier particulate. The fluidized bed reactor may combust the char to reheat the heat carrier particulate. The reheated heat carrier particulate may be provided to the falling bed reactor to pyrolyze biomass to create a pyrolysis product and a pyrolysis waste product.

First claim

1 . A dual bed pyrolysis system, comprising:
a falling bed reactor, comprising:
a reactor conduit defining a flow axis;
an inlet operatively coupled to receive a heat carrier particulate into the reactor conduit;
an outlet operatively coupled to direct the heat carrier particulate out of the reactor conduit;
one or more baffles mounted in the reactor conduit; and
a fluidized bed reactor, comprising:
a fluidized bed char combustion chamber; and
a flow input and a flow output in fluidic communication with fluidized bed char combustion chamber;
wherein:
the outlet of the falling bed reactor is operatively coupled to the flow input of the fluidized bed reactor; and
the flow output of the fluidized bed reactor is operatively coupled to the inlet of the falling bed reactor.

2 . The dual bed pyrolysis system of claim 1 , further comprising one or more of:
a first auger or conveyor or downward sloping pipe, the outlet of falling bed reactor being operatively coupled to the flow input of the fluidized bed reactor via the first auger or conveyor or downward sloping pipe; and a second auger or conveyor or downward sloping pipe, the flow output of the fluidized bed reactor being operatively coupled to the inlet of the falling bed reactor via the second auger or conveyor or downward sloping pipe.

3 . (canceled)

4 . (canceled)

5 . (canceled)

6 . The dual bed pyrolysis system of claim 1 , the falling bed reactor being mounted to orient the flow axis in a substantially vertically downwards direction.

7 . (canceled)

8 . (canceled)

9 . The dual bed pyrolysis system of claim 1 , the inlet being operatively coupled to the reactor conduit upstream of the outlet with respect to the flow axis.

10 . (canceled)

11 . (canceled)

12 . The dual bed pyrolysis system of claim 1 , further comprising:
a pyrolysis substrate inlet operatively coupled to receive a pyrolysis substrate into the reactor conduit; and a pyrolysis product outlet operatively coupled to direct a pyrolysis product out of the reactor conduit.

13 . (canceled)

14 . (canceled)

15 . (canceled)

16 . (canceled)

17 . The dual bed pyrolysis system of claim 12 , one or more of:
the pyrolysis substrate inlet being coincident with the inlet; and the pyrolysis product outlet being coincident with the inlet or the outlet.

18 . (canceled)

19 . (canceled)

20 . (canceled)

21 . (canceled)

22 . (canceled)

23 . (canceled)

24 . (canceled)

25 . (canceled)

26 . (canceled)

27 . The dual bed pyrolysis system of claim 1 , the one or more baffles extending from an inside wall of the reactor conduit into the reactor conduit, each of the one or more baffles comprising a baffle surface, at least a portion of the baffle surface being at an oblique angle with respect to the flow axis, the one or more baffles being mounted to place at least the portion of each baffle surface at the oblique angle with respect to the flow axis such that the one or more baffles form a staggered or alternating pattern in the reactor conduit.

28 . (canceled)

29 . (canceled)

30 . The dual bed pyrolysis system of claim 1 , the one or more baffles extending from an inside wall of the reactor conduit into the reactor conduit, each of the one or more baffles comprising a baffle surface, at least a portion of the baffle surface being at an oblique angle with respect to the flow axis, the oblique angle being between about 30° and about 60° with respect to the flow axis such that for each baffle surface, a free edge of the baffle surface is further downstream along the flow axis compared to a mounted edge of the baffle surface.

31 . (canceled)

32 . The dual bed pyrolysis system of claim 1 , further comprising an agitator mechanism configured to agitate at least a portion of the one or more baffles effective to dislodge a particulate on at least a portion of the one or more baffles.

33 . The dual bed pyrolysis system of claim 1 , further comprising a heater configured to cause pyrolysis of a substrate in the falling bed reactor by heating one or both of the falling bed reactor and a heat carrier particulate to be fed into the falling bed reactor.

34 . (canceled)

35 . (canceled)

36 . (canceled)

37 . (canceled)

38 . (canceled)

39 . (canceled)

40 . (canceled)

41 . A method for pyrolyzing a substrate, comprising:
feeding a heat carrier particulate to a gravity-fed baffled conduit; feeding a pyrolysis substrate to the gravity-fed baffled conduit such that the heat carrier particulate and the pyrolysis substrate mix to form a pyrolysis mixture; and heating the heat carrier particulate and/or the gravity-fed baffled conduit to pyrolyze the pyrolysis substrate in the pyrolysis mixture to form a pyrolysis product mixture and a pyrolysis waste mixture, the pyrolysis waste mixture comprising the heat carrier particulate and a coarse char pyrolysis product.

42 . The method of claim 41 , further comprising one or more of:
combusting the coarse char pyrolysis product in the presence of the heat carrier particulate to reheat the heat carrier particulate; feeding the reheated heat carrier particulate to the gravity-fed baffled conduit; and directing the heat carrier particulate and the coarse char pyrolysis product out of the gravity-fed baffled conduit prior to combusting the coarse char pyrolysis product in the presence of the heat carrier particulate to reheat the heat carrier particulate.

43 . (canceled)

44 . (canceled)

45 . The method of claim 41 , the pyrolysis product mixture comprising a gas or vapor pyrolysis product and a fine char pyrolysis product, further comprising one or more of:
directing the gas or vapor pyrolysis product and the fine char pyrolysis product out of the gravity-fed baffled conduit; directing the gas or vapor pyrolysis product and the fine char pyrolysis product out of the gravity-fed baffled conduit at the same level as the heat carrier particulate and the coarse char pyrolysis product; directing the gas or vapor pyrolysis product and the fine char pyrolysis product out of the gravity-fed baffled conduit upstream compared to the heat carrier particulate and the coarse char pyrolysis product; and directing the gas or vapor pyrolysis product and the fine char pyrolysis product out of the gravity-fed baffled conduit downstream compared to the heat carrier particulate and the coarse char pyrolysis product.

46 . (canceled)

47 . (canceled)

48 . (canceled)

49 . The method of claim 41 , further comprising one of:
directing the heat carrier particulate and the coarse char pyrolysis product out of the gravity-fed baffled conduit; feeding the heat carrier particulate to the gravity-fed baffled conduit comprising feeding the heat carrier particulate and the pyrolysis substrate at the same level of the gravity-fed baffled conduit; feeding the heat carrier particulate to the gravity-fed baffled conduit comprising feeding the heat carrier particulate to th

Assignees

• Battelle Memorial Institute

Inventors

• Abdullah Zia
• O'Brian Michael A
• Winecki Slawomir
• Taha Rachid

Classifications

• B01J8/087

  Heating or cooling the reactor · CPC title

• B01J8/388 Primary

  externally, i.e. the particles leaving the vessel and subsequently re-entering it · CPC title

• B01J2208/00876

  outside the bed, e.g. rotary mixer · CPC title

• C10B49/18

  according to the "moving bed" type · CPC title

• B01J2208/00168

  with heat exchange elements outside the bed of solid particles · CPC title