Improved Furnace Efficiency through the Use of Refractory
Abstract. This paper describes efforts performed at Oak Ridge National Laboratory (ORNL) in collaboration with industrial refractory manufacturers refractory users and academic institutions to improve energy efficiency of U.S. industry through increased furnace efficiency brought about by the employment of novel refractory systems and techniques.
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Figure 1Two types of air cooled slagging gasifiers a) single injector GE type and b) opposing flow dual injector ConocoPhillips type. Figure 2General cross-section of an air cooled slagging gasifier. Failure of today s refractory lining in a slagging gasifier is expensive both in terms of refractory
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ENGINEERED REFRACTORIES FOR SLAGGING COAL GASIFIERS
Refractory failure is typically by spalling and/or corrosive wear. Early attempts to develop non-chrome oxide refractories were hampered by a lack of understanding of the failure mechanisms in slagging gasifiers by raw material purity issues and by the superior performance of Cr2O3 refractories.
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Fate of inorganic matter in entrained-flow slagging
Sep 01 2014 · Most of the successful high throughput coal gasifiers developed in the past 60 years are of the entrained-flow slagging type . This study is the second part of a three-part research program which involves fuel characterization testing in a 1 MW th gasifier and computational fluid dynamics (CFD) modeling for entrained-flow slagging gasification.
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New Developments in Gasifier Refractories
Gasification Technologies 2002 Conference San Francisco California October 27-30 2002 contains the gasification reaction in slagging gasifiers. In this paper we examine how refractory materials fail in the gasifier environment and introduce a new refractory refractory failure. Dissolution of the refractory in slagging environments
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Gasifier Refractories Coal Slags and Their Interaction
refractory and demonstrated it can dramatically decrease slag penetration depth and extend refractory service life in laboratory cup rotary drum tests and field test panels. Coal is one of the major feedstock in gasifiers. Slag properties from impurities in coal affect not only the operation of a gasifier but also the performance of Cr. a
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(186c) Modeling Slag Deposition and Refractory Degradation
CCPS Center for Chemical Process Safety RAPID RAPID Manufacturing Institute DIPPR Design Institute for Physical Properties SBE
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New Developments in Gasifier Refractories
Gasification Technologies 2002 Conference San Francisco California October 27-30 2002. FY 2002 On-site Review Strategies to Improve Refractory Performance in Slagging Gasifiers • Design a more "slag-resistant" refractorySlag penetration and attack Typical Refractory Wear in Slagging Gasifier Environments Spalling
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Refractory failure in IGCC fossil fuel power systems
Request PDF Refractory failure in IGCC fossil fuel power systems Current generation refractory materials used in slagging gasifiers employed in Integrated Gasification Combined Cycle (IGCC
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Improved Refractories for IGCC Power Systems
Current generation refractory liners in slaggingmore » gasifiers are typically replaced every 10 to 18 months at costs ranging up to 2 000 000. Compounding materials and installation costs are the lost-opportunity costs for the three to four weeks that the gasifier is off-line for the refractory exchange.
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New Developments in Gasifier Refractories
Gasification Technologies 2002 Conference San Francisco California October 27-30 2002. FY 2002 On-site Review Strategies to Improve Refractory Performance in Slagging Gasifiers • Design a more "slag-resistant" refractorySlag penetration and attack Typical Refractory Wear in Slagging Gasifier Environments Spalling
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An Effect of Phosphorous gas Generated in Slagging
Abstract. Entrained flow slagging gasifiers are used to covert coal petcoke and other carbon feedstock to syngas (CO and H 2) which is used as a fuel in power generation or is converted into chemical products.During the gasification process gasifier components such as refractory liners syngas coolers and thermocouples are aggressively attacked by corrosive slags and gases originating from
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MOLTEN SLAGS FORMED DURING GASIFICATION OF
Water cooled slagging gasifiers have a water cooling coil that is covered with a highly conductive SiC containing monolithic refractory material. The low surface temperature caused by the water cooling causes the molten slag to solidify on the liner protecting it from wear. Air cooled slagging gasifiers are lined with refractory mate-
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Refractory Materials for Slagging Gasifiers
3 refractory has been developed patented and the technology licensed to industry. • Laboratory proof-of-concept continues on several non Cr 2O 3 refractory materials that show promise for gasifier applications where fuel flexibility is desirable. • Understanding of thermocouple failure in gasifiers continues to evolve with remediation
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Refractory failure in slagging gasifiers (Conference
The high Cr2O3 refractory liners of gasifiers fail within 3 to 24 months due to slag attack at elevated temperatures. Gasifier users seek materials with increased reliability and service life. The causes of refractory failure and efforts to increase refractory service life are discussed.
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ENGINEERED REFRACTORIES FOR SLAGGING COAL GASIFIERS
Refractory failure is typically by spalling and/or corrosive wear. Early attempts to develop non-chrome oxide refractories were hampered by a lack of understanding of the failure mechanisms in slagging gasifiers by raw material purity issues and by the superior performance of Cr2O3 refractories.
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Effective Diffusivity and Spalling Models for Slagging
Dec 15 2008 · Spalling reduces the lifetime of hot‐face refractory linings in slagging coal gasifiers and has an important impact on the economics of coal gasification. Spalling is caused by ingress of the molten slag into the porous refractory followed by reaction with the refractory to produce either volumetric expansion (compressive stresses) or
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Figure 1Two types of air cooled slagging gasifiers a) single injector GE type and b) opposing flow dual injector ConocoPhillips type. Figure 2General cross-section of an air cooled slagging gasifier. Failure of today s refractory lining in a slagging gasifier is expensive both in terms of refractory
Get Price
Gasifier Refractories Coal Slags and Their Interaction
refractory and demonstrated it can dramatically decrease slag penetration depth and extend refractory service life in laboratory cup rotary drum tests and field test panels. Coal is one of the major feedstock in gasifiers. Slag properties from impurities in coal affect not only the operation of a gasifier but also the performance of Cr. a
Get Price
(PDF) Improved Thermocouple Assemblies for Slagging Gasifiers
Current generation refractory liners in slagging gasifiers are typically replaced every 10 to 18 months at costs ranging up to 2 000 000. understanding of refractory failure in gasifier
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New Developments in Gasifier Refractories
Gasification Technologies 2002 Conference San Francisco California October 27-30 2002. FY 2002 On-site Review Strategies to Improve Refractory Performance in Slagging Gasifiers • Design a more "slag-resistant" refractorySlag penetration and attack Typical Refractory Wear in Slagging Gasifier Environments Spalling
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Refractory loss in slagging gasifiers Request PDF
Request PDF On Jan 1 2001 C.P. Dogan and others published Refractory loss in slagging gasifiers Find read and cite all the research you need on ResearchGate
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Development of Slag Management System SpringerLink
Degradation of refractory liners is one of the key factors limiting the service life of entrained flow slagging gasifiers which is caused primarily by refractory/slag interactions. Slag originates from impurities in the carbon feedstock typically coal and/or petcoke which melt and coalesce during gasification flowing over the refractory
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Wear Mechanisms of Chromia Refractories in Slagging Gasifiers
Dec 17 2007 · The refractory liner protects the gasification system from the high‐temperature corrosive gaseous and from the molten slag environment associated with the conversion of carbon feedstocks. This paper will discuss the effect of gasifier operating conditions and carbon feedstock slag/ash chemistry on the refractory service life.
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Refractory material lines a gasifier and gives it ability to withstand extremely high operating temperatures. In the most severe slagging gasifiers refractories can require replacement every three months in which the gasifier system needs to be shut down for one to two weeks. These shut-downs can cost a plant millions of dollars.
Get PriceRefractory failure in entrained-flow gasifier Vision
Nov 01 2017 · Thus the investigation of the refractory failure mechanism is one of the key technologies being investigated for development in the gasification field. The hot face (slag exposed surface) bricks of slagging gasifiers are lined by refractory materials.
Get PriceMOLTEN SLAGS FORMED DURING GASIFICATION OF
Water cooled slagging gasifiers have a water cooling coil that is covered with a highly conductive SiC containing monolithic refractory material. The low surface temperature caused by the water cooling causes the molten slag to solidify on the liner protecting it from wear. Air cooled slagging gasifiers are lined with refractory mate-
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LOW CHROME/CHROME FREE REFRACTORIES FOR
Figure 1Two types of air cooled slagging gasifiers a) single injector GE type and b) opposing flow dual injector ConocoPhillips type. Figure 2General cross-section of an air cooled slagging gasifier. Failure of today s refractory lining in a slagging gasifier is expensive both in terms of refractory
Get Price
Refractory failure in IGCC fossil fuel power systems
Request PDF Refractory failure in IGCC fossil fuel power systems Current generation refractory materials used in slagging gasifiers employed in Integrated Gasification Combined Cycle (IGCC
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