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Density of kraft white liquor

WebThis study aimed to evaluate the influence of white liquor sulfidity on the efficiency of the kraft pulping process. For this study, Eucalyptus spp. chips were used. Laboratory cooking with variable sulfidity levels (0 to 40% at 5% intervals) was conducted under previously optimized conditions, aiming to obtain pulp with a Kappa number of 18 ± ... Webliquor. Black liquor may contain varying percentages of solids ranging from 2% to 80%. The chemical composition of black liquor varies based on its solids content. Content of …

Lime mud recycling improves the performance of kraft …

WebThe black liquor byproduct is used to manufacture green liquor. Calcium oxide is used to turn the green liquor into white liquor, resulting in the production of calcium carbonate as a byproduct. In a side process, the calcium carbonate is recycled to produce calcium oxide. Figure 1 provides a process flow diagram of the Kraft pulping cycle. WebThis study aimed to evaluate the influence of white liquor sulfidity on the efficiency of the kraft pulping process. For this study, Eucalyptus spp. chips were used. Laboratory … food for troops donate https://sigmaadvisorsllc.com

Specific Gravity Chart for Layering Drinks and Shots - The Spruce …

WebThe measurement of true liquor properties in the Kraft liquor cycle has been a challenge for the pulp manufacturing industry. Much of the previous generation of analysis relies on … Webwhite liquor clarifiers-by a factor of 4 at one mill, for example (5). White liquor clarifiers are designed on the basis of being thickeners to compact the mud, so the resulting horizontal cross-sectional area is more than adequate to properly settle the solids and provide clear white liquor (6). WebThe causticized green liquor is known as “white liquor” which contains mostly NaOH and Na2S. It is returned to the digester for reuse in pulping. ... converting the fuel value in kraft black liquor (13,000 to 15,000 kJ/kg) to steam is typically lower than for fossil fuel combustion, because of the heat used to evaporate the ... food for train travel

2-1 Recausticizing - Principles & Practice - TAPPI

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Density of kraft white liquor

Selected physical parameters of spruce chips vs. alkali …

WebBlack liquor contains very fine organics, various chemicals, and water as a mixture. Black liquor dry solids are defined as a mass ratio of dried black liquor to wet black liquor before drying. If the water content in black liquor is above 80%, it has a negative net heating value, Fig. 11.3.In that case, all heat from the combustion of organics in black … Webto as “white liquor.” This digestion process commonly takes place at 180 °C (356 °F). The spent chemicals, called “black liquor,” are then separated from the pulp using a series of …

Density of kraft white liquor

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White liquor is a strongly alkaline solution mainly of sodium hydroxide and sodium sulfide. It is used in the first stage of the Kraft process in which lignin and hemicellulose are separated from cellulose fiber for the production of pulp. The white liquor breaks the bonds between lignin and cellulose. It is called … See more White liquor consists mainly of sodium hydroxide and sodium sulfide in water and is the active component in Kraft pulping. White liquor also contains minor amounts of sodium carbonate, sodium sulfate, sodium thiosulfate See more • Paper chemicals See more The Kraft cooking liquor (white) is used to extract the lignin and break down the cellulose composition of wood chips into usable pulp. The white (cooking) liquor becomes weak black liquor and is sent to the recovery process. See more WebThe opportunities for improving impregnation of kraft white liquor start in description of the parameters affecting the process. The first parameter is the chip itself (its basic density, …

WebThe kraft pulping process (see Figure 10.2-1) involves the digesting of wood chips at elevated temperature and pressure in "white liquor", which is a water solution of sodium … WebWHITE LIQUOR PRESSURE DISC FILTER COMPRESSOR LIME MUD SLURRY TANK TO LIME MUD STORAGE WHITE LIQUOR WHITE LIQUOR SEPARATOR FROM …

WebJan 1, 2009 · Sulfide ions (S ⁻² ) derived from Na 2 S in black liquor, after the pulping process, is the source of production H 2 S during of black liquor recovery cycle in Kraft pulp and paper industries. WebMar 29, 2024 · Kraft pulping. In kraft pulping, white liquor, containing mainly active chemicals—sodium hydroxide and sodium sulphide—is used for cooking the chips at a high temperature (150–170°C) and pressure. Approximately, half of the wood composition degrades and dissolves during cooking. The spent cooking liquor (black liquor) contains …

WebGreen liquor is the dissolved smelt of sodium carbonate, sodium sulfide and other compounds from the recovery boiler in the kraft process. The liquor's eponymous green colour arises from the presence of colloidal iron sulfide. The green liquor is usually reacted with lime (CaO) in the causticizing stage to regenerate white liquor. Alternatively ...

Webliquor. Black liquor may contain varying percentages of solids ranging from 2% to 80%. The chemical composition of black liquor varies based on its solids content. Content of TRS gases are also variable based on whether it is a strong or weak liquor. 4. First-Aid Measures Ingestion: Immediately contact local poison control center. Ingestion may ... eldarya illustration eventWebMay 1, 2009 · The higher heating value of black liquor depends upon the type of wood/wood mix and the type of pulp produced. The typical HHV of black liquor from different sources varies from 2700 kcal/kg to 4000 kcal/kg of dry solids. The higher heating value of black liquor is an important parameter in sizing a recovery furnace and … food fort waltonWebApr 1, 2009 · Note that the products resulted from the digester reactions are the cellulose pulp and the black liquor. In the Kraft recovery unit, the black liquor passes first through a set of multiple-effect evaporators, in which it is concentrated from 15% to about 70–75% of solids to become an adequate fuel. eldarya illustration ep 5WebThe resulting state estimates are then used in a model predictive control (MPC) strategy for TTA regulation. Results from implementation at a kraft mill are reported. Author: Bruce Allison, Bruce Halvorson, and David Pawson. MODEL PREDICTIVE CONTROL OF SMELT DISSOLVING TANK TTA USING FT-NIR LIQUOR COMPOSITION ANALYSER, 2010 … food for two peopleWebCooking liquor (white liquor) for the kraft process is produced from smelt generated in the recovery boiler. Quick lime is slaked in the smelt solution (green liquor) producing white … food forum belconnenWebwhite liquor clarifiers-by a factor of 4 at one mill, for example (5). White liquor clarifiers are designed on the basis of being thickeners to compact the mud, so the resulting horizontal … food fort st johnWebThe amount of an element accumulated over time in the liquor cycle or in the lime cycle of a kraft pulp mill. The accumulation factor of an element in the liquor cycle is defined as the mass ratio of the element in the white liquor over its total input into the mill system. The accumulation factor of an element in the lime cycle is defined food for ulcer patient