the characteristics of black liquor sprays
The effect of temperature on drop size of black liquor sprays
The effect of temperature on drop size of black liquor sprays produced by small grooved-core nozzles at near boiling point conditions was investigated. It was found that increasing temperature through the boiling point decreased the Sauter mean diameter in a smooth manner by a magnitide accounted for by the viscosity decrease. In contrast water sprayed through the same nozzle under
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black liquor spray characteristics PASI MIIKKULAINEN ARI KANKKUNEN MIKA P. JÄRVINEN AND CARL-JOHAN FOGELHOLM ABSTRACT Full-scale black liquor spraying experiments were carried out at three spraying temperatures and three mass flow rates with high solids content black liquor. We studied the spray
Get PriceBoiling Point Rise of Strong Black LiquorsTechnische
The Release of Sodium and Carbon During Black Liquor Pyrolysis of Black Liquor Characteristics on Alkali Salt Aerosols in Industrial Recovery Boilers. VTT Chemical Technology / VTT Energy / Oy Metsa-Botnia Ab / Veitsiluoto Oy / Finnish Meteorological Institute 1994. print version. 158 Drop Formation of Black Liquor Sprays. Helsinki
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In black liquor gasification (fig. 4 ) black liquor is injected in an atomized form into a high pressure high temperature reactor with either oxygen or air as the combustion medium. The organic materials are gasified into raw synthetic gas (syngas) while the inorganic solids such as sodium and potassium fall to the bottom to be returned to
Get PriceSimulation of the spray characteristics of black
The method of introducing black liquor into a recovery boiler is critical to a successful operation. The nozzle spray has an effect on the furnace bed size and shape bed and furnace outlet gas temperatures fuming rate and carryover. The selection of the type of nozzle and its operating parameters has traditionally been based on a combination
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1 Black Liquor Sprays Rick Wessel Ph.D. Advisory Engineer The Babcock Wilcox Company Slide 2 Outline • Objectives and key variables • Black liquor spray nozzles • Droplet size distribution • Spray distribution • Implications for recovery boilers
Get PriceControlling black liquor "viscosity" to improve recovery
affects the spray characteristics of the liquor and hence the char bed size and shape in recovery boilers 1 . It depends greatly on liquor solids content tem-perature and residual alkali content 2 . Highly viscous black liquor does not flow well it pro-duces coarse spray droplets and results in larger and higher char beds. Low-viscosity
Get PriceTreatment of black liquor derived from non-woody
3.1 Characteristics of black liquor Analysis of the black liquor and the spent solution after lignin separations at the concentration of 9 7 and 1.5 (based on TS) are recorded in Table 2. These data indicated that the pH-value of the spent solution was acidic whereas that of the original black liquor
Get PriceBlack liquor Climate Technology Centre Network Tue
Black liquor gasification is an emerging commercial technology founded on decades of research and development. Its goal is to produce a combustible mixture of raw gases as well as separate out the inorganic pulping chemicals for recycling for the pulping process. The processes can take place at low 600 degrees Celsius or high temperatures around 1000 degrees Celsius.
Get Price"Characterization of Black Liquor Sprays for Application
In this work the differences between and 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 flow rates were measured to allow relevant
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black liquor spray characteristics PASI MIIKKULAINEN ARI KANKKUNEN MIKA P. JÄRVINEN AND CARL-JOHAN FOGELHOLM ABSTRACT Full-scale black liquor spraying experiments were carried out at three spraying temperatures and three mass flow rates with high solids content black liquor. We studied the spray
Get PriceBLSpray Understanding the Effect of Black Liquor
September 2000 to develop a computer code (BLSpray) that can accurately predict black liquor spray flow characteristics. The three main uses of the code will be as follows develop an improved nozzle based on understanding the effect changes in nozzle configuration and black liquor properties have on spray characteristics
Get PriceResearch on combustion of black-liquor dropsScienceDirect
Jun 01 1999 · Abstract Black liquor the major by-product of the kraft process for production of pulp is one of the most important industrial fuels. It is burned in recovery boilers in the form of large spray drops (mm) with the objective of simultaneous recovery of heat and chemicals (sodium and sulfur).
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The Value of Black Liquor Although there are potential gains with a better understanding of the properties for all liquors associated with the Kraft liquor cycle the largest gains are probably associated with the black liquor sector of the cycle. For this reason the majority of this paper will deal with the black liquor portion of the cycle.
Get PriceProperties Composition and Analysis of Black Liquor 2.1
The main component was found to be xylose nsity of black liquor is important in the calculation of flow characteristics. The density of black liquor is mainly affected by the concentration of inorganic components. This is a nearlinear function of the dry solids content. Density depends on the organic and inorganic solids at higher solids content.
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3.1 Characteristics of black liquor Analysis of the black liquor and the spent solution after lignin separations at the concentration of 9 7 and 1.5 (based on TS) are recorded in Table 2. These data indicated that the pH-value of the spent solution was acidic whereas that of the original black liquor
Get PriceInfrared Imaging of Black Liquor Droplets
Black liquor is a byproduct of the kraft paper pulping process it is made up of chemicals solids and water. A recovery boiler s main purpose is to provide heat in order to convert the chemicals in the black liquor back to reusable form. This is accomplished by spraying the black liquor
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black liquor spray characteristics PASI MIIKKULAINEN ARI KANKKUNEN MIKA P. JÄRVINEN AND CARL-JOHAN FOGELHOLM ABSTRACT Full-scale black liquor spraying experiments were carried out at three spraying temperatures and three mass flow rates with high solids content black liquor. We studied the spray
Get PricePredicting Droplet Size from Black Liquor Spray
Predicting Droplet Size from Black Liquor Spray Characteristics 2004 International Chemical Recovery Conference. Full-scale spraying experiments in the spraying chamber were carried out at three spraying temperatures and three mass flow rates with high solids content black liquor. The spray disintegration mechanism the length of the sheet and
Get PriceBlack Liquor Combustion in Kraft Recovery Boilers
Black liquor is a by-product which results from digestion of wood chip in alkaline pulping solving partial differential equations governing the characteristics phenomenon in a Kraft 3.2 Black Liquor Combustion 20 3.2.1 Spray 20 3.2.2 In-flight Drop Combustion 23 3.2.3 Char Bed Processes 24
Get PriceBlack liquor Climate Technology Centre Network Tue
Black liquor gasification is an emerging commercial technology founded on decades of research and development. Its goal is to produce a combustible mixture of raw gases as well as separate out the inorganic pulping chemicals for recycling for the pulping process. The processes can take place at low 600 degrees Celsius or high temperatures around 1000 degrees Celsius.
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the velocity of the spray and generally also reduces the size of the droplets. The velocity and the droplet size of the black liquor exiting the spray nozzles are of great importance as they decide where and how combustion is taking place. In this work the results from two different versions of a one-dimensional plug-flow spray model
Get PriceBiofuels Is black liquor the key to a brighter future for
In black liquor gasification (fig. 4 ) black liquor is injected in an atomized form into a high pressure high temperature reactor with either oxygen or air as the combustion medium. The organic materials are gasified into raw synthetic gas (syngas) while the inorganic solids such as sodium and potassium fall to the bottom to be returned to
Get PriceControlling black liquor "viscosity" to improve recovery
affects the spray characteristics of the liquor and hence the char bed size and shape in recovery boilers 1 . It depends greatly on liquor solids content tem-perature and residual alkali content 2 . Highly viscous black liquor does not flow well it pro-duces coarse spray droplets and results in larger and higher char beds. Low-viscosity
Get PriceBlack Liquor Combustion in Kraft Recovery Boilers
Black liquor is a by-product which results from digestion of wood chip in alkaline pulping solving partial differential equations governing the characteristics phenomenon in a Kraft 3.2 Black Liquor Combustion 20 3.2.1 Spray 20 3.2.2 In-flight Drop Combustion 23 3.2.3 Char Bed Processes 24
Get PriceCombustion of black liquor (Patent) OSTI.GOV
This patent describes an improvement in the combustion of black liquor in an existing Tomlison recovery boiler unit in which black liquor is sprayed into a furnace in which it is successively dried pyrolyzed and converted to a bed of solid carbonaceous residue using a primary air stream and a secondary air stream and the residue is subsequently converted to a smelt.
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