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Showing 1 to 14 of 14 for “"black liquor"”.
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Black Liquor Droplet Combustion and Modeling
Black liquor is an intermediate product of pulp production. Recovery boilers process black liquor to recover the inorganic material for recycling in the mill and to generate electricity and steam for the paper mill. Black liquor droplet combustion rates and mechanisms dictate many aspects of …
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Comprehensive Black Liquor Droplet Combustion Studies
Black liquor, a byproduct from pulp production, is burned in a recovery boiler to generate electricity and recover inorganic materials. Black-liquor-droplet combustion is fundamental to understanding and potentially improving recovery boiler performance. This investigation reports comprehensive …
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Numerical modeling of chemical recovery from black liquor char
… the char burning stage of chemical recovery from black liquor is presented. Chemical recovery from black liquor is characterized by the occurrence of multiple, simultaneous reactions occurring in dynamic flow conditions. Rate equations for the different chemical reactions are incorporated into a …
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Agglomeration of Bed Particles in Low-Temperature Black Liquor Gasification
… monoxide as well as other greenhouse gases. Black liquor is a byproduct from the Kraft process in making paper. Black liquor can be gasified and used as a fuel in recovery boilers and fluidized bed steam reformers. Recovery boilers have a low efficiency and are used today because of their …
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Characterization of Black Liquor Sprays for Application to Entrained-Flow Processes
… characteristics of water and high solids, heated black liquor sprays from air-assist atomizers are examined. Sprays were imaged with a high speed camera and the images analyzed with computer code to produce droplet size data and macroscopic spray characteristics such as mass distribution. Fluid …
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Using TiO2 to Optimize the Photocatalytic Degradation of Kraft Black Liquor Using Response Surface Methodology
… pollutants into water bodies, air and landfills. Black liquor is a major byproduct from pulp mills such as Kraft. Black liquor is utilized in boilers to produce steam and electricity. Black liquor is a low-value chemical and researchers have employed thermal and chemical processes to produce …
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Evaluation of membrane filtration for treatment of black liquor in small-scale pulp and paper mills in India
Black liquor, a strongly polluting byproduct from the kraft pulping process in pulp and paper mills, is traditionally treated by being passed through multiple effect evaporators and burned in a recovery boiler to produce energy and recover chemicals. However, the traditional treatment of black …
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Kraft lignin as a fuel for the rotary lime kiln
… chemical recovery boiler, in which concentrated black liquor is burned, represents the principal obstacle to increased production. However, studies have shown that the removal of even a small portion of the lignin from the black liquor would permit an incremental increase in furnace capacity. …
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Smelt spout corrosion in a recovery boiler
Acidentes com Bicas de Smelt são reportados pelo Black Liquor Recovery Boiler Advisory Committee, BLRBAC, e constituem uma preocupação real de segurança sob o ponto de vista operacional. Tipicamente o smelt escorre através de bicas refrigeradas a água da fornalha para o tanque dissolvedor e uma …
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Identification and analysis of extractable organic compounds present in pulp and paper mill effluent
… of the released compounds. The progress of black liquor spills through the treatment system can be monitored by measuring the levels of compounds such as 4-hydroxy-3-methoxybenzaldehyde and 4-hydroxy-3-methoxyacetophen- one. Similarly, α-terpineol can be used to assess turpentine losses …
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Twin screw extrusion pre-treatment of wheat straw for biofuel and lignin biorefinery applications
… study, crude lignin was recovered from black liquor and fractionated with solvents. Lignin and the fractions were characterised with solvent solubility, SEC, UV, FTIR, 1H and 13C NMR and evaluated for the antioxidant activity with AAI ranged from 0.3 to 2.4. Reason for the low …
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An analysis of student participation in campus governance as a contributing factor to student development
… related on others. Though the treatment of black liquor to remove lignin and production of carboxylated lignin for copolymerization seem practical, the microbial treatment of lignin in general is economically unattractive at present.
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Combustion of lignin-oil-water mixtures in a rotary kiln
Lignin recovery from black liquor has been proposed to de-bottleneck recovery boiler limited Kraft mills. The precipitated lignin would be used as a fuel in the lime kiln, replacing the external fuel, such as natural gas or fuel oil, presently used. In this work lignin-oil-water mixtures were …