GasificationWikipedia
Gasification is a process that converts biomass- or fossil fuel-based carbonaceous materials into gases including as the largest fractions nitrogen (N2) carbon monoxide (CO) hydrogen (H2) and carbon dioxide (CO2). This is achieved by reacting the feedstock material at high temperatures (typically >700 °C) without combustion via controlling the amount of oxygen and/or steam present in
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Corrosion in Black Liquor Pyrolysis and Combustion Gas
Corrosion in Black Liquor Pyrolysis and Combustion Gas Environments Preet M. Singh Institute of Paper Science and Technology Atlanta Georgia Colloquium on BL Combustion and Gasification Park City Utah May 13th 2003 2003
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COMPARISON OF REFRACTORY PERFORMANCE IN BLACK
Prior laboratory corrosion studies along with experience at the black liquor gasifier in New Bern North Carolina clearly demonstrate that serious material problems exist with the gasifier s refractory lining. Mullite-based and alumina-based refractories used at the New Bern facility suffered significant
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Corrosion in Black Liquor Pyrolysis and Combustion Gas
Corrosion in Black Liquor Pyrolysis and Combustion Gas Environments Preet M. Singh Institute of Paper Science and Technology Atlanta Georgia Colloquium on BL Combustion and Gasification Park City Utah May 13th 2003 Recovery Boiler To stack Electrostatic precipitator Primary Secondary Tertiary Air delivery Black liquor Smelt Economizer
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Refractory for Black Liquor Gasifiers (Technical Report
article osti_860861 title = Refractory for Black Liquor Gasifiers author = Headrick Jr William L and Karakus Musa and Liang Xiaoting abstractNote = The University of Missouri-Rolla identified materials that permit the safe reliable and economical operation of combined cycle gasifiers by the pulp and paper industry. The primary emphasis of this project was to resolve the material
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Challenges in Black Liquor Recovery in Modern Kraft Pulp Mills
Problems in Modern Pulp Mills Evaporators Scaling Corrosion High steam consumption Low solids in product liquor Recovery Boilers Fouling and plugging Corrosion and cracking Low steam production Poor sootblowing efficiency Poor water circulation Smelt-water explosions Gaseous/particulate emissions Tube damage by falling deposits
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Title Refractory for Black Liquor Gasifiers
The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low- existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment
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REFRACTORIES FOR BLACK LIQUOR GASIFICATION
treatment of black liquor (BL). Black liquor is a w ater solution of the non-cellulose portion of the wood (mainly lignin) and the spent pulping chemical s (Na 2CO 3 K 2CO 3 and Na 2S). Development of new refractory materials for the black liquor ga sification (BLG) application is a critical issue for implementation of this technology.
Get PriceBlack Liquor Gasificationan overview ScienceDirect Topics
Black liquor gasification (BLG) involves pyrolyzing concentrated black liquor into an inorganic phase and a gas phase through reactions with oxygen or air at high temperatures. BLG technology can be an alternative to using a recovery boiler to produce electricity chemicals or fuels such as dimethyl ether synthetic gas (syngas) methanol
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Black Liquor Recovery BoilersAn Introduction
The Black Liquor Recovery Boiler Advisory Committee (BLRBAC) has developed a recommended system to avoid or mitigate smelt-water explosions. This system is known as the Emergency Shutdown Procedure or ESP. If water is known or suspected to be entering a BLRB furnace the operator is trained to actuate the ESP which simultaneously sounds an
Get PriceWhite Paper Evaporator Issues and Technology
Oct 31 2018 · including scaling corrosion liquor carry-over vacuum issues condensate segregation and foaming liquor. Valmet s TUBEL concentrator addresses scaling as does the mixing of ash heavy black liquor (HBL) recirculation and on-demand washing. Corrosion is addressed by using 304L SS and duplex alloys in appropriate areas.
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ABSTRACTacee.princeton.edu
Black liquor a mixture of lignin and inorganic chemicals is generated in this process as fiber is extracted from wood. At most kraft milIs today black liquor is burned in Tomlinson boilers to produce steam for on-site heat and power and to recover the inorganic chemicals for reuse in the process. GlobalIy the black liquor generation rate is
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REFRACTORY FOR BLACK LIQUOR GASIFIERSCORE
Stress and strain due to thermal and chemical expansion has been observed to be detrimental to the lifespan of existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment materials
Get PriceUnexpected corrosion of stainless steel in high solids
Sep 01 2002 · Table 1. Relative corrosion rates of of stainless steels in 75 -80 solids black liquor. Alloy Relative corrosion rate (304L rate = 1) 654SMO 0.3 2205 0.5 304 0.9 304L 1 AL-6XN 2.1 904L 3.4 254SMO 3.6 316L 3.7 317L 3.9 David C. Bennett is principal engineer at
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White Paper Evaporator Issues and Technology
Oct 31 2018 · including scaling corrosion liquor carry-over vacuum issues condensate segregation and foaming liquor. Valmet s TUBEL concentrator addresses scaling as does the mixing of ash heavy black liquor (HBL) recirculation and on-demand washing. Corrosion is addressed by using 304L SS and duplex alloys in appropriate areas.
Get Price
Corrosion in Black Liquor Pyrolysis and Combustion Gas
Corrosion in Black Liquor Pyrolysis and Combustion Gas Environments Preet M. Singh Institute of Paper Science and Technology Atlanta Georgia Colloquium on BL Combustion and Gasification Park City Utah May 13th 2003 Recovery Boiler To stack Electrostatic precipitator Primary Secondary Tertiary Air delivery Black liquor Smelt Economizer
Get Price
Title Refractory for Black Liquor Gasifiers
The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low- existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment
Get Price
Industrial Inspections Case StudyBlack Liquor Recovery
Under Deposit corrosion (UDC) is one of the hardest types of corrosion to identify and a common mode of failure in boiler tubes. UDC is not only a high risk of eventual tube failure but it can also be deadly in black liquor recovery boilers. The biggest issue it can t physically be seen. This localized corrosion
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MATERIALS AND WELDING GUIDELINES FOR BLACK
Black Liquor Recovery Boiler Advisory Committee Materials and Welding Guidelines for Black Liquor Recovery Boilers October 2010 Page 4 GENERAL DOCUMENT FORWARD The BLRBAC Materials and Welding Subcommittee was formed to provide a center of expertise on recovery boiler materials and welding issues.
Get PriceMATERIALS AND WELDING GUIDELINES FOR BLACK
Black Liquor Recovery Boiler Advisory Committee Materials and Welding Guidelines for Black Liquor Recovery Boilers October 2010 Page 4 GENERAL DOCUMENT FORWARD The BLRBAC Materials and Welding Subcommittee was formed to provide a center of expertise on recovery boiler materials and welding issues.
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ITP Materials Materials for High-Temperature Black Liquor
corrosion-resistant refractories and nozzle mate ria ls fo r use in high-temp erature atmospheric-black liquor gasifiers. Barriers Major barriers to be overcome include • Lack of understanding of the failure mechanisms of refractories and nozzle materials
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ABSTRACTacee.princeton.edu
Black liquor a mixture of lignin and inorganic chemicals is generated in this process as fiber is extracted from wood. At most kraft milIs today black liquor is burned in Tomlinson boilers to produce steam for on-site heat and power and to recover the inorganic chemicals for reuse in the process. GlobalIy the black liquor generation rate is
Get Price
Black Liquor Gasification netl.doe.gov
The Kraft process chemicals in black liquor and the high temperatures of gasification (around 950°C) exert tremendous strain on the gasifier itself especially the heat resistant refractories that line the reactor (a problem discussed elsewhere). Refractories can see
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Industrial Inspections Case StudyBlack Liquor Recovery
Under Deposit corrosion (UDC) is one of the hardest types of corrosion to identify and a common mode of failure in boiler tubes. UDC is not only a high risk of eventual tube failure but it can also be deadly in black liquor recovery boilers. The biggest issue it can t physically be seen. This localized corrosion was happening at a paper mill
Get PriceTitle Refractory for Black Liquor Gasifiers
The primary emphasis of this project will be to resolve the materials problems encountered during the operation of low-pressure high-temperature (LFHT) and low- existing black liquor gasifiers. The thermal and chemical strain as well as corrosion rates must be accounted for in order to predict the lifetime of the gasifier containment
Get Price
