Preliminary dryer for the charcoal kilns

Pre-drying (PD) is a device for automatic preparation of a heat carrier - a drying agent for use in drying devices. The basis of the coolant is the excess heat released during the pyrolysis process


Preliminary dryer for the charcoal kilnsPreliminary dryer is used to “quickly and efficiently” remove moisture from wood to obtain dry raw materials for pyrolysis. Preliminary drying takes place outside of the drying/pyrolysis chamber, which can significantly shorten the cycle time and increase the productivity of the kiln from 50 to 100% when using “fresh” wood.

Preliminary drying of raw materials can be carried out either in trolleys for EKKO, or in a separate chamber of continuous or periodic operation for Bio-kiln. The use of a chamber or a drying drum for preliminary drying significantly increases the efficiency of the process, due to the special design of the chamber, which provides minimal heat loss and the most effective contact of the heat carrier with the raw material.

Preliminary drying of raw materials not only reduces the duration of the process, but also affects the quality and yield of charcoal. It is recommended to apply preliminary drying, if the moisture content of raw material exceeds 30%.

Main advantages of the contact dryer:

    • Increase kiln productivity
    • Increase % charcoal yield
    • Effective drying of "raw materials"
    • Compactness
    • Easy operation
    • Low cost
    • Security

From the table below, you can clearly see the difference in the cycle time at different humidity of the raw material for the production of charcoal.

Relative humidity of wood, % Cycle time, h.
< 20 > 12
< 40 > 16
<55 > 24
<70 > 36

Preliminary dryer for the charcoal kilns


  Item Name Note Quant., pcs
1 High-temperature smoke exhauster T < 400ºC 1
2 Thermocouple THAT T< 800ºC 1
3 Thermal mixer To dilute coolant with cold air <200ºC, optimal drying of wood 1
4 Distribute heat To distribute heat to two trolleys 1
5 Trestle for trolleys

Place for the installation of trolleys




Excess heat generated as a result of carbonization of plant material enters the flue, using a high-temperature smoke exhauster (1). The hot gas is fed to the mixer (3), where its temperature is lowered to that required by mixing with cold air. The prepared heat transfer medium is then supplied through the distribution manifold (4) to the drying device (5), in this instance a kiln trolley.

PRELIMINARY DRYING in trolleys of the carbonization furnace "EKKO"

Preliminary dryer for the charcoal kilns

Technical description

Options for devices for preliminary drying of raw materials:

  1. Chamber drying (batch type)
  2. Continuous Tunnel Drying
  3. Continuous shaft drying
  4. Continuous Drum Drying
  5. Trolleys for GreenPower EURO and EKKO kilns

When using the preliminary dryer, it is recommended to increase the number of trolleys for one kiln to 8 pcs. It is also recommended to “close” the trolley from the weather.

Why do customers choose us?

  • No emissions during operation
  • Compactness and mobility of equipment
  • High performance (up to 60 tons of charcoal per month)
  • Full mechanization and automation of the operational process
  • The use of modern materials - reliable design
  • The number of screenings does not exceed 1%
  • Quality and guarantees - confirmed by
    19 years of experience on the market
  • Mobile equipment

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