Pumping Applications in the Paper and Pulp Industry

Learn about the various pumping applications within paper & pulp processing and how DAE Pumps can help solve challenges of the paper & pulp industry.
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Common Pump Applications

The papermaking process involves metering, mixing and pumping a wide variety of chemicals and high temperature, abrasive material. Our paper pumps and pulp pumps can handle these caustic chemicals and will pump abrasives without damaging or wearing out the pump. Conventional diaphragm metering pumps often pump in short pulses which over time can cause damage to the mills piping systems.

Common Paper Production Applications

  • Wood Chipping / Debarking
  • De-inking Chemicals
  • Stock Preparation
  • Wet End Chemical Preparation
  • Starch Preparation
  • Coating Color Kitchen
  • Wastewater and Sludge Dewatering
Paper and Pulp Pumps

Paper & Pulp Pump Applications

Wood Chipping / Debarking

The initial stage of paper and pulp production starts with the raw materials, which in many cases, are trees. The trees are cut into logs and then undergo a debarking and chipping process to prepare it for the paper processing cycle.

Woodchips and bark are very abrasive and can destroy other pumps, but DAE Pumps pumps can withstand this harsh process because of the high-quality construction.

Pump for debarking process: Submersible Slurry Pumps, Self-Priming Pumps

De-inking Chemical Application

Corrosive chemical additives like sulphuric acid, sodium hydrosulfite, sodium silicate, sodium hydroxide, and soaps are commonly used in the paper mills during the de-inking stage of production.

De-inking uses froth flotation as an industrial process. In the flotation tank, bubbles are dispersed in the pulp. The bubbles collect the ink particles and rise to the top where they are skimmed off. The pulp falls to the bottom where it is pumped out. 

Pump for the de-inking process: Submersible Slurry Pumps, Flooded Suction Pumps, Self-Priming Pumps, Lobe Pumps, Gear Pumps, Rotary Vane Pumps 

Stock Preparation

Pulp Paper Tank

Paper mills require a continuous feeding of paper/pulp solution for constant production. After the papermill receives the pulp from the pulp mill, is when stock preparation occurs. The pulp and cellulose fibers are suspended in water for adding fillers to the pulp to control the fiber bonding as the batches or continuous roll of paper forms.

A variety of pumps can be used in this process of transferring the liquids from one process to the other.

Pump for the stock preparation process: Submersible Slurry Pumps, Flooded Suction Pumps, Self-Priming Pumps, Lobe Pumps, Gear Pumps, Rotary Vane Pumps

Wet End Chemical Preparation

Paper production involves the use of several process additives such as fillers, starch, sizing agents, retention aids, fixing agents, dyes, optical brighteners (OBA), polyaluminum chloride (PAC), precipitated calcium carbonate (PCC) and alkyl ketene dimer (AKD). These chemicals are metered and then pumped into the stock using positive displacement pumps.

Pump for the wet end chemicals preparation process: Submersible Slurry Pumps, Flooded Suction Pumps, Self-Priming Pumps, Lobe Pumps, Gear Pumps, Rotary Vane Pumps

Starch Preparation

Cationic starch is cooked into a paste-like solution, metered, and constantly pumped into the paper stock mix. Cationic starch is primarily used as a strength and retention aid in papermaking and requires pumps with an ability to perform at higher temperatures (over 100°C).

Pump for the starch preparation process: Flooded Suction Pumps, Self-Priming Pumps

Wastewater and Sludge Dewatering

The paper production process inevitably creates unusable byproducts such as liquid and dewatered sludge, flocculants, and effluents that must be continuously removed or pumped away from the processing site. This process can sometimes be a strain on the budget, as this process does not add to the profits in any way. For this reason, it is vital to use the most cost-effective solution that provides optimal production rates.

Pump for the wastewater process: Submersible Slurry Pumps, Flooded Suction Pumps, Self-Priming Pumps

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Slurry Pumps for Paper and Pulp Industry

Most slurry pumps are capable of performing the necessary tasks in the paper and pulp industry. However, not all manufacturers make the high-quality slurry pumps that DAE Pumps build to handle the abrasive pulp and bark, and corrosive chemicals. We provide reliable and durable pumps that require little maintenance that saves you time and money. We build slurry pumps for the paper and pulp industry that last. 

All DAE Pumps process slurry. Some pump types work better in different applications than another, and sometimes the set-up or available space dictates the type. DAE Pumps provides plenty of pump choices for paper and pulp applications. Choose slurry pumps that are submersible, self-priming, or flooded suction. We also supply positive displacement pumps that use mechanical levers to move fluids.

Self-Priming Pumps

The self-priming pump draws liquids and solids from tanks to the pump where it then transfers the material to other tanks. The suction hose goes into the slurry while the pump and power unit are not. Self-priming pumps are skid mounted for more permanent setups or trailer mounted to be wheeled from one location to another. The operation and maintenance of DAE Pumps self-priming pumps are worry-free and easy.

Self-priming pumps make an excellent choice for a pump in paper and pulp for every application. They can be used in the processing of woodchips and debarking, de-inking, stock, wet end, and starch preparation, dewatering, and wastewater.

DAE Pumps Self-Priming Pumps
DAE Pumps Flooded Suction Pumps for Paper and Pulp

Flooded Suction Pumps

Flooded suction pumps move slurry and liquid from tanks, hoppers, and other storage systems to another system. A flooded suction pump is installed on the outside and towards the bottom or below the liquid. The liquid then uses gravity to feed the flooded suction pump. This always keeps the pump primed, as priming a pump is crucial in its operation. Because the chamber and piping inside the pump are always filled with water, starting and stopping flooded suction pumps are quick and easy. The maintenance of these pumps is very easy. Most flooded suction pumps are horizontal built, but when space is limited, vertical flooded suction pumps are installed.

The DAE Pumps flooded suction pump is ideal for outside of tanks and hoppers for de-inking, stock, wet end, and starch preparation, dewatering, and wastewater.

Submersible Pumps

Using a submersible slurry pump with the proper flow rate, head, impeller, and agitator expedites the pumping process and ensures hassle-free operation. The size and shape of the head and the discharge outlet determine the flow rate of a slurry pump. The submersible pump provides excellent operations inside sludge or wastewater tanks and they are capable of suctioning excess bark and pulp. 

The DAE Pumps submersible pump is applicable in every aspect of paper and pulp. These robust pumps can transfer wet material from woodchips and debarking to stock, wet end, and starch preparation, to wastewater.

Positive Displacement Pumps

The DAE Pumps line of positive displacement pumps performs flawlessly in pulp and paper applications. Our non-clogging rotary gear pumps, lobe pumps, and vane pumps can process slurry with pulp solids and liquids without worry. We provide these pumps in several metal types for whatever corrosive or non-corrosive chemicals you need to move.  Our pumps are capable of moving fluids forwards and backward which makes it simple for filling and emptying tanks with little changing of equipment. When looking to clean or maintain the equipment, these pumps allow for easy access to the chamber and parts.

Positive displacement pumps offer the uniqueness that the others do not. The ability to process forward and backward makes them ideal in stock, wet end, and starch preparation, and de-inking.

Need Help Selecting a Pump?

For help selecting the most efficient pump for your project, call us at (760) 821-8112 or submit a request.

Types of Paper & Pulp Pumps

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