Humidity Control in Veneer Dryer

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Introduction

Veneer drying is an important process before plywood manufacturing. Controlling veneer’s moisture content to Optimized value for each wood material is a key to make good adhesion characteristics at next plywood manufacturing process. For this purpose, humidity of the air in dryer is controlled and moisture content of veneer is adjusted.

Expected Benefits

  • Increase Energy Efficiency of Veneer Dryer Process
  • Reduce Operating Cost
  • Improve Yield of Veneer for Plywood Manufacturing
  • Improve Quality of Veneer for Plywood Manufacturing

Process Overview

In order to control veneer’s moisture content to optimized value from 6 to 20% for each wood material, humidity of the air in the dryer is measured and controlled from 30 to 40%. Temperature is controlled from 130 to 200 deg. C.
As the results, dry veneer with optimized moisture content is manufactured.

Humidity Measurement in a Steamer

Solution Details

Field Data

Process conditions

Humidity 30 to 40 %
Temperature 130 to 200 ℃
Pressure 20 to 40 mmH2O
Dust Trace wood dust

Measurement system

Detector ZR22G-040-S-C-E-T-T-E-A /CV
Converter ZR802G-☐-☐-N-N /☐
Flow setting unit ZA8F-A*C
Pressure regulator G7013XF or G7014XF
Air set K9473XK

Utilities

Rated voltage 100 to 240 V AC
Rated frequency 50/60 Hz
Power consumption 330 VA (Max. 800 VA)
Instrument air 300 to 700 kPa

ZR802G

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