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Steam Culture: Black Liquor

Posted by Ritchie Ware on Feb 23, 2016 2:52:01 PM

WARE Rental Boiler Louisville KY Steam Culture Black Liquor Paper ProductionLast week we discussed using wood pulp to produce paper products and its byproduct, black liquor. Just like coffee fuels us up on a Monday morning, black liquor fuels the paper-making process.

If you remember from last week, black liquor is created when cellulose fiber and lignin is separated from the wood chips. Wood pulp mills have used black liquor as an energy source since the 1930s.

Black liquor as an energy source

Did you know black liquor can also be used in a boiler? When the black liquor is only 18% solid, it is boiled down using steam heat until it is reduced by about 60%. Then, it is transferred into a recovery boiler to generate steam and recover the chemicals from the wood pulp for re-use.

As a renewable energy source, the steam can be transferred into many different uses, such as:

1. Papermaking Process
2. Turn Electric Generators
3. Electric Sold to Power Grid

Burning a waste product, like black liquor, to produce steam that generates electricity is called cogeneration. After the black liquor is burned off, a substance called green liquor remains. Plant employees then add lime to the substance to create white liquor. Watch the video to see how we've come full circle in this process.

Be sure to subscribe to our YouTube channel and tune in every Friday for our latest Steam Culture.

If you have any steamy questions that you want Brent to answer, email him at steamculture@wareinc.com. Be sure to join us next Friday for the latest on Steam Culture.

Topics: Steam Culture, Black Liquor, Forestry and Paper Industry


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