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Language: English French
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Evaporators Series (Details)Includes 5 courses for $299/year. Pulping Library (Details)Includes 72 courses for $1,499/year.
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Training Time: 23 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, French
Multiple-effect evaporator sets are used to remove water from black liquor so that it can be fired into a recovery boiler and the pulping chemicals can be recovered for reuse. The efficient operation of the evaporators is critical to the mill's economic success and environmental compliance. This module describes the operations of the most common black liquor evaporator designs. It then details some common problems and their impact on the capacity and economy of this process.
Black Liquor Evaporators - Equipment
View Course
Black Liquor Evaporators - Introduction
Black Liquor Evaporators - Principles
Black Liquor Testing
Kraft Recovery Boilers - Fireside
The following key questions are answered in this module:
What is a multiple effect evaporator set?A multiple effect evaporator set is an unit made up of multiple evaporator bodies, or stages of evaporation.
How are NCGs removed from the surface condenser?NCGs are generally removed from surface condensers by vacuum-creating steam ejectors.
What is the thermal driving force in an evaporator set?The thermal driving force of the evaporator set is the difference in temperature provided by the incoming fresh steam and temperature of the surface condenser.
What is boiling point rise?Boiling point rise, or BPR, refers to the fact that as black liquor becomes more concentrated, the temperature at which it boils increases.
What is ""boil out""?""Boil out"" is the operation of shutting down and effect and passing fresh water or a chemical solution through it with the intention of dissolving scale, or deposits, which develop on the heat exchange surfaces of evaporators as they operate.
Below is a transcript of the video sample provided for this module:
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