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Pulp & Paper: Bleaching
Application Summary
| Application |
Pulp & Paper Bleaching |
| Description |
Wood pulp bleaching to attain the desired level of paper whiteness |
| How Used |
Pump bleaching agents into mixing towers to maintain correction solution |
| Key Feature |
Chemical resistant pump materials |
| Micropump Products |
GJ |
| End Equipment |
Paper pulp bleaching equipment |
| Pump Function |
Dosing |
| Fluids |
Hydrogen Peroxide |
| Flow Rate |
50 mL/min (0.79 USG/hr) to 19L/min (300 USG/hr) flow rates |
| Differential Pressure |
<40 psi (<2.76 bar) |
Application Overview
Pulp & Paper Manufacturing Process
The following illustration is an overview of the entire Pulp & Paper manufacturing process. Notice that Micropump pumps have application in three of the process steps. This application brief focuses on the application of Micropump pumps in the Bleaching process step.
Application Focus: Bleaching
In the paper manufacturing process, wood pulp leaving the digester wash unit often must be bleached to attain the desired level of paper whiteness. Bleach plants whiten pulp through three to five stages of bleaching and water washing.
Micropump pumps are used in these applications to deliver the appropriate bleaching agent and to maintain the proper chemical balance in the bleaching towers.
Micropump pumps deliver smooth, controlled flow of whitening agents to the bleaching towers.
| PUMPING REQUIREMENTS |
MICROPUMP SOLUTIONS |
| FLOW RATE: 0.050 to 18.9 L/min (0.79 to 300 USG/hr) flow rates |
We have variable speed pumps with flows from 0.158 to 42.9L/min (2.5 to 680 USG/hr) |
| CHEMICAL RESISTANT PUMP MATERIALS |
Our pump construction materials stand up to most pulp bleaching chemicals |
| PRECISE FLOW CONTROL |
We offer positive displacement gear pumps for precise metering of bleaching agents |
| LEAK-FREE OPERATION |
Our pumps have magnetic drives, so no shafts penetrate the pump cavity, eliminating leak-prone dynamic shaft seals |
| MAINTAINABILITY |
We offer Service Kits for easy field serviceability |
Micropump Products Optimized for this Application
Micropump cavity style pumps are commonly used for this application. All pump base materials are 316 SS with PTFE wetted materials.
Series GJ MAGNETIC DRIVE GEAR PUMP
Series GJ Pump:
Magnetic Drive Gear Pump
FLOW RATE: .158 to 6.8L/min (2.5 to 107 USG/hr)
MAX DIFFERENTIAL PRESSURE: 80 psi (5.6 Bar)
MAX SYSTEM PRESSURE: 300 psi (21 Bar)
WETTED MATERIALS: 316SS and PTFE
DRIVES: NEMA, IEC, EagleDrive™ and Micropump drive mounts
Performance Summary
This chart indicates optimal operating ranges for recommended products.
Micropump Advantage
The unparalleled quality, performance record, reliability and long operating life of Micropump pumps and our extensive engineering expertise make Micropump a vital partner in this demanding market.
