Kraft Recovery Boilers - Liquor System

SKU: C-709Duration: 32 Minutes Certificate Included

Pay-per-view (PPV) format perfect for individual users.

Get immediate access to this interactive eLearning course online. Must be used within 30 days, expires 48 hours after launch.

Great for in-person classroom training or as an alternative to DVD.

Includes printable documents and Convergence Video Player for Windows systems. Content expires after 1 year.

Ideal for corporate licensing and volume users who also need administrative tracking and reporting on training.

Get this interactive eLearning course into your LMS or learn how you can leverage our LMS to deliver training to your workforce.

Need multiple courses or have lots of users? Just let us know a little more about what you need and we’ll get you some great volume pricing.

 Need help deciding? Compare delivery formats.

Course Details

Specs

Training Time: 32 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

"Strong" black liquor enters the recovery boiler containing 65-85% dry solids. The recovery boiler uses strong black liquor as its main fuel and during normal operation functions with black liquor as the only fuel. The cooking chemicals flow out of the recovery boiler as molten salts, or smelt, and are turned into green liquor in the dissolving tank. This green liquor is sent to the recausticizing process for conversion to white liquor. This module describes the components and flow of a recovery boiler liquor system as well as the combustion process of black liquor.

At the end of this module, you will be able to:

  • Describe why strong black liquor is burned in a kraft recovery boiler
  • Describe the components of black liquor
  • Identify the causes of black liquor variability
  • Identify the effects of black liquor variability
  • Identify and describe the key components of a recovery boiler liquor system
  • Describe the flow of black liquor to the recovery boiler
  • Describe the combustion process of black liquor
  • Identify and describe the safety hazards around the kraft recovery boiler liquor system and typical safety systems used

The following key questions are answered in this module:

Why does black liquor need to be heated?
Concentrated black liquor is quite viscous. Heating the liquor is required so that it can be pumped and sprayed into the boiler.

What happens to black liquor in a recovery boiler?
Black liquor is burned in a recovery boiler in order to recover heat and cooking chemicals.

What will happen if a solids level below 60% is detected at the liquor ring header?
If low solids is detected in black liquor flowing to the boiler, the liquor is diverted back to the mix tank.

What is mixed with black liquor at the mix tank?
Dust and ash from the sootblower hoppers and the electrostatic precipitator, and sometimes make-up saltcake is added to the black liquor in the mix tank.

What can cause variations in the viscosity of black liquor?
Some of the conditions that affect the viscosity of black liquor include, solids concentration, wood species, final kappa, and the time and temperature cooking profile.

Below is a transcript of the video sample provided for this module:

The Kraft recovery boiler air system consists of three levels of air ports: Primary, secondary, and tertiary that allow the heated air to enter the boiler for combustion. The strong black liquor is sprayed into the boiler between the secondary and tertiary ports through the liquor gun ports located at about 15 feet above the furnace bottom. First, the liquor droplets dry as they fall through the hot combustion gases, then the easily volatilized components are released from the liquor droplets and burned. Next, the remaining char which is mostly carbon and the sodium compounds falls unto the smelt bed where the char burns off leaving the smelt. The smelt then flows out of the bottom of the furnace and into the dissolving tank to become green liquor completing the recovery boiler processing of the strong black liquor.

Use the additional resources and links below to learn more about this topic:

Customer Q&A

Ask a Question

Sorry, we're missing some information

How do I log in to watch a video that I have already paid for?

Easy! Moments after you purchase your pay-per-view (PPV) course, you'll receive an email with login details. Just click the link and log in with your user name and password and you're on your way!

I would like to have some of my employees take 5 of your driving related courses, how can i set this up?

We're in the process of making bulk purchases and purchases for multiple users easier. But for now, you can order multiple courses and just let us know who you'd like to assign courses to. With an email for each user, we can set up their training plans and make sure everyone gets the eLearning assignments they need.

How can I get your paper-making courses for free?

Well, we can't blame you for asking... And while we're a for-profit company, there are situations with students and certain educational organizations where we can help out with a selection of eLearning. However, our online courses are extremely economical. And our paper industry courses are in very high demand. So, without knowing more about your situation, we think you'll get loads of value from the $39 you'll spend on any of our premium courses.

Do you have eLearning in Portuguese?

Yes, we do! And in addition to primary English narration, we produce many courses in a growing number of languages, including Spanish, Chinese, Dutch, German, Italian, Japanese, Korean, Polish, Russian, Tamil, and Thai.

I'm unemployed, but I really like your eLearning. Do I get a certificate when I complete a course?

Yes! All of our courses allow you to print a completion certficate upon successfully passing the integrated test at the end of eLearning. In the future, we'll have badges for you to use in your LinkedIn profiles.
Added to Cart! Click here to view your cart.