With increased focus on industrial carbon footprint, mills must start looking for simple and effective ways to reduce carbon output. Evaporating water from lime mud is a very energy intensive and important step in the lime kiln and calcining process. Providing the kiln with a stable, dry mud will improve energy consumption and lime product quality. A proven solution for stabilizing lime mud dryness is the addition of FreeFlow-188. It is a non-ionic, biodegradable, food grade blend of surfactants that is compatible with all Kraft liquor streams.
Typical Carbon Tax Savings with FreeFlow-188
By reducing the amount of water fed to the lime kiln by 200 kilograms per tonne of lime per day, approximately $848.00 can be saved. The calculations assume a carbon price of $50 per tonne. Yearly savings in typical 100, 200, 250, 300 tonne per day lime kilns are shown in the following table.
Table 1: Yearly Carbon Tax and Energy Savings for Typical Lime Kilns
| Tonnes Lime | Carbon Price | Natural Gas Price per GJ | Water Reduction | Total Carbon tax and Natural Gas Savings (CND) |
| 200 | $50.00 | $2.50 | 40 | $169,709.00 |
| 250 | $50.00 | $2.50 | 50 | $212,137.00 |
| 300 | $50.00 | $2.50 | 60 | $254,564.00 |
| 350 | $50.00 | $2.50 | 70 | $296,992.00 |
| 400 | $50.00 | $2.50 | 80 | $339,419.00 |
FreeFlow-188 can help realize these savings and improve the lime quality by extending the calcining zone. Improved lime quality will help stabilize the recausticizing plant and provide superior white liquor. For more information on FreeFlow-188, including references and how McFarlen Engineering Ltd. can help improve your Recausticizing System please contact our Vancouver offices.
http://recaust.com/product/freeflow-188/