US 11,028,325 B2Granted

Heat removal and recovery in biomass pyrolysis

AssigneeEnsyn Renewables, Inc.

InventorsSathit Kulprathipanja, Paolo Palmas, Daniel N. Myers

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Abstract

Pyrolysis methods and apparatuses that allow effective heat removal, for example when necessary to achieve a desired throughput or process a desired type of biomass, are disclosed. According to representative methods, the use of a quench medium (e.g., water), either as a primary or a secondary type of heat removal, allows greater control of process temperatures, particularly in the reheater where char, as a solid byproduct of pyrolysis, is combusted. Quench medium may be distributed to one or more locations within the reheater vessel, such as above and/or within a dense phase bed of fluidized particles of a solid heat carrier (e.g., sand) to better control heat removal.

Claims16

Dependent claims

An apparatus for pyrolysis of a biomass feedstock, comprising:

i) a pyrolysis reactor;
ii) a solid-gas cyclone separator in fluid communication with the pyrolysis reactor;
iii) a reheater having a lower section and an upper section, the lower section configured to contain a dense phase bed of heat carrier particles, the upper section configured to contain a dilute phase of heat carrier particles, said reheater in fluid communication with the cyclone separator;
iv) a quench liquid distribution system, comprising:
a) a first quench liquid distributor in the lower section, the first quench liquid distributor positioned to be disposed within the dense phase bed;
and
b) a second quench liquid distributor in the upper section;
and
v) a reheater temperature control system that provides
i) coarse control of heat removal from the reheater by adjusting a flow rate of a first quench stream through the first quench liquid distributor;
and
ii) fine control of heat removal from the reheater by adjusting a flow rate of a second quench stream through the second quench liquid distributor.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/233,560Filed 10 Aug 2016 · continuation
Priority: 22 Feb 2011
Published: US 2016/0348005 A11 Dec 2016
Granted: 8 Jun 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification28 codes

C10B 39/06
Wet quenching: in the oven
C10G 1/02
Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal: by…
C10G 3/40
Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids: thermal non-catalytic treatment
C10G 3/42
Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids: catalytic treatment

Family

Application13/031,701Parent of this continuation · filed 22 Feb 2011
US 2016/0348005 A1Pre-grant publication · published 1 Dec 2016
US 9,441,887 B2Parent of this continuation
US 2012/0214113 A1Published application
US 11,028,325 B2This patent

From the US filing history. Foreign family members aren’t listed.

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