Kraft Recovery Boilers - Liquor System

SKU: C-709Duration: 32 Minutes

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.

Language:  

$39
 Add to Cart

Great for trainers or groups who need unlimited online access to multiple courses. Available in two ways:

Recovery Series (Details)
Includes 8 courses for $499/year.

Pulping Library (Details)
Includes 72 courses for $1,499/year.

Ideal for corporate licensing and high volume users.

Get Convergence courses into your current LMS to track and report employee training. Or contact us to learn more about the advantages of licensing our courses with the Convergence LMS.

Get Pricing Info

Course Details

Specs

Training Time: 32 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English, Portuguese, French, Polish, Russian

"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.

Learning Objectives

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

Key Questions

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.

Sample Video Transcript

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.

Customer Q&A

I would like to have several employees take multiple courses. How can I set that up?

We're in the process of making bulk course and multiple user purchases easier. But for now, you can order multiple courses and contact us with details on who you'd like to assign courses to. We can set up each user's training plan and make sure everyone gets the eLearning assignments they need.

Can I get a free full-length preview of a course to see what this course covers?

While we do our best to offer details on course contents, we don't normally offer full-length previews. But please contact us with more details for a better understanding of what your organizaton needs and how we can help.

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 each eLearning course.

How do I log in to take a course that I have already paid for?

You'll receive an email with login details moments after you purchase your pay-per-view (PPV) course. Just click the login link and enter the user name and password provided.

Do you have courses in different languages?

Yes. While all of our courses are originally produced in English, we develop many courses in a growing number of languages, including Chinese, Dutch, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Tamil, and Thai. Available languages are normally displayed in the Course Details section on each course page.
Added to Cart! Click here to view your cart.
Training Software
eLearning Courses
Solutions
Convergence Training Newsletter

Stay up to date on our products and offerings and get safety, compliance, and training administration tips in our free monthly newsletter.

© Convergence Training | Privacy Policy