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Title: Improved vortex reactor system

Abstract

An improved vortex reactor system is described for affecting fast pyrolysis of biomass and Refuse Derived Fuel (RDF) feed materials comprising: a vortex reactor having its axis vertically disposed in relation to a jet of a horizontally disposed steam ejector that impels feed materials from a feeder and solids from a recycle loop along with a motive gas into a top part of said reactor. 12 figs.

Inventors:
;
Publication Date:
Research Org.:
Midwest Research Institute; National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
46290
Patent Number(s):
US 5,413,227/A/
Application Number:
PAN: 7-956,667
Assignee:
Midwest Research Inst., Kansas City, MO (United States) CHO; SCA: 090900; PA: EDB-95:076318; SN: 95001384508
DOE Contract Number:
AC02-83CH10093
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 9 May 1995
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; CHEMICAL REACTORS; DESIGN; BIOMASS; PYROLYSIS; REFUSE DERIVED FUELS; VORTEX FLOW; MATERIALS HANDLING EQUIPMENT; LOADING

Citation Formats

Diebold, J.P., and Scahill, J.W.. Improved vortex reactor system. United States: N. p., 1995. Web.
Diebold, J.P., & Scahill, J.W.. Improved vortex reactor system. United States.
Diebold, J.P., and Scahill, J.W.. 1995. "Improved vortex reactor system". United States. doi:.
@article{osti_46290,
title = {Improved vortex reactor system},
author = {Diebold, J.P. and Scahill, J.W.},
abstractNote = {An improved vortex reactor system is described for affecting fast pyrolysis of biomass and Refuse Derived Fuel (RDF) feed materials comprising: a vortex reactor having its axis vertically disposed in relation to a jet of a horizontally disposed steam ejector that impels feed materials from a feeder and solids from a recycle loop along with a motive gas into a top part of said reactor. 12 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1995,
month = 5
}
  • An improved vortex reactor system for affecting fast pyrolysis of biomass and Refuse Derived Fuel (RDF) feed materials comprising: a vortex reactor having its axis vertically disposed in relation to a jet of a horizontally disposed steam ejector that impels feed materials from a feeder and solids from a recycle loop along with a motive gas into a top part of said reactor.
  • A pressurized water nuclear reactor system includes a vortex mitigator in the form of a cylindrical conduit between the hot leg conduit and a first section of residual heat removal conduit, which conduit leads to a pump and a second section of residual heat removal conduit leading back to the reactor pressure vessel. The cylindrical conduit is of such a size that where the hot leg has an inner diameter D.sub.1, the first section has an inner diameter D.sub.2, and the cylindrical conduit or step nozzle has a length L and an inner diameter of D.sub.3 ; D.sub.3 /D.sub.1 ismore » at least 0.55, D.sub.2 is at least 1.9, and L/D.sub.3 is at least 1.44, whereby cavitation of the pump by a vortex formed in the hot leg is prevented.« less
  • This patent describes an improvement in a pressurized water nuclear reactor system having a reactor pressure vessel, at least one steam generator, a hot leg conduit for charging of hot fluid from the reactor pressure vessel to the steam generator, and at least one cold leg conduit for return of cool fluid from the steam generator back to the reactor pressure vessel. The improvement comprises a residual heat removal device wherein: the hot leg has an inside diameter D{sub 1}; a first section of residual heat removal conduit is provided, having an inside diameter D{sub 2}, a first end formore » receipt of fluid from the hot leg, and a second end; a second section of residual heat removal conduit is provided connected to the reactor pressure vessel; a pump interconnects the second end of the first section of residual heat removal conduit with the second section of residual heat removal conduit; and a step nozzle of an inside diameter D{sub 3} and a length L interconnects the hot leg to the first end of the first section of residual heat removal conduit, with D{sub 3}/D{sub 1} {ge} 0.55, with D{sub 3}/D{sub 2}1.9 and L/D{sub 3} {ge} 1.44.« less
  • This patent describes a method for prevention of corrosion, due to oxygen activity, in a boiling water nuclear reactor system having a main feedwater recirculation loop comprising a reactor vessel with a reactor core and with a steam off-take line and a condensate return line in flow communication with the vessel for recirculating feedwater between the reactor and a steam turbine. The coolant water recirculation loops consist of coolant water off-take and return lines in flow communication with the vessel for recirculating coolant water in the vessel, wherein hydrogen is added to the coolant water passing through the reactor coremore » to reduce the oxygen content of the coolant water. The improvement consists of: recirculation coolant water containing dissolved oxygen, after passage through the reactor core, is diverted from the recirculation loop; hydrogen gas is added to the diverted coolant water; the hydrogen-containing diverted coolant water is contacted with a catalyst effective to enhance reaction of hydrogen with oxygen contained in the coolant water; and the diverted coolant water, after reaction of the hydrogen gas with the oxygen contained therein, is returned to the recirculation loop for passage through the reactor core.« less