Carbonization furnace EKKO

A fully developed environmentally friendly system for carbonization of carbonaceous raw materials, including firewood, energy wood, wood waste, fuel-briquettes (Pini-kay, nestro, ruv, etc.) in order to produce high-grade charcoal. The main process used in the furnace is carbonization or pyrolysis of plant materials containing carbon. In addition to the production of charcoal, heat energy is generated in the process This heat can be used for preliminary drying of the raw material or for other purposes. If the customer wishes, it is possible to produce liquid pyrolysis products.


Угольная печь ЭККО-2

Charcoal is widely used in almost all spheres of the global economy (see more details on the use of charcoal). Production of environmentally friendly high quality charcoal is an urgent problem in the development of the world economy.

Based on 20 years of experience (since 2001, see the history of GreenPower), a unique safe pyrolysis unit has been developed, taking into account the basic requirements of modern consumers:

  1. The chamber carbonization furnace is manufactured using modern insulating materials that can withstand ultra-high temperatures (up to 1300 ° C), which eliminates the need for "ballast" refractory bricks, concrete and sheet metal. This solution speeds up the process and increases plant efficiency.
  2. The automated control system developed by us allows automating the technological process and minimizing the influence of the human factor on the productivity of the charcoal kiln and the quality of the finished charcoal. The introduction of the ability to save all datas about production parameters at all stages of charcoal production in the Cloud storage via the Internet allows you to provide remote ONLINE control of the work of maintenance personnel and the entire technological process as a whole.
  3. The unique design, produced with experience out over 20 years, guarantees the reliability and maintainability of the charcoal furnace and it's elements. The charcoal kiln will reliably serve for more than 5 years, if necessary, any part and element can be easily and quickly repaired or replaced.
  4. Logistics and mechanization. Competent and well-thought-out logistics of the charcoal production complex makes it possible to eliminate costs that may exceed the cost of the equipment itself: the purchase of expensive forklifts and the installation of hoists, crane beams, building of hard surfaces for production, which is necessary when using forklift. This compares favorably with most manufacturers, who usually do not indicate these costs, at the stage of purchasing charcoal kilns.

Other advantages of the EKKO

  • High quality at a highly reasonable price;
  • Compactness and low weight (savings on delivery);
  • Economical, no additional fuel is required, only to start the furnace;
  • Low consumption of electrical energy <0,1 kWh;
  • Environmental safety - no harmful emissions during the operation of the furnace;
  • Quick start of the furnace to the operating mode <60 minutes;
  • Resistance of the combustion device to thermal shock;
  • Quick first start of the new furnace, preparation <8 hours;
  • Possibility of transporting two to three ovens in a container/truck;
  • Charcoal retains the shape of the raw material, the fines fraction (undersize particle) of charcoal does not exceed 1%;
  • High performance of the furnace, with relatively small dimensions


Raw materials

 Thanks to the introduction of the latest technologies, a wide range of raw materials can be subjected to environmentally friendly pyrolysis (more about the “pyrolysis” process):

  • firewood, energy wood, lumpy wood materials, fuel waste;
  • woodworking / logging waste, substandard timber (including roots, branches, etc.);
  • various fuel briquettes (Pini-Kay, Ruff, Nestro, Nielsen)

wood waste for charcoal

Technical description

The EKKO charcoal kiln is produced in three models: EKKO-1, EKKO-2 and EKKO-4, the main differences are the overall dimensions of the kiln and the number of chambers for the carbonization process (2 or 4). We use a couple of chambers, since carbonation takes place in two different reactions: endothermic and exothermic. Therefore, we use an exothermic reaction in one chamber to carry out an endothermic reaction in another. It should be noted that in charcoal production, the endothermic reaction can occur twice: in the raw material drying stage and primary pyrolysis, as well as in the charcoal calcination stage, if a high carbon content is required. The main advantages of EKKO furnaces are the ability to carry out the entire carbonization process without additional fuel or contamination.

We use paired chambers, as carbonization takes place in two different reactions: endothermic and exothermic. Therefore, we use an exothermic reaction in one chamber to carry out an endothermic reaction in another. It should be noted that in charcoal production, the endothermic reaction can occur twice: in the raw material drying and primary pyrolysis stage, and again in the charcoal calcination stage if a high carbon content is required. A great advantage of EKKO furnaces is the ability to perform the entire carbonization process without additional fuel or emissions.

Dimensions of the kiln ЕККО-1 /EKKO-2 / EKKO-4

Dimensions of the charcoalkiln ЕККО

Description of the kiln

The construction of the charcoal kiln consists of two or four process chambers, which are connected to the
another elements of furnace:
• firechamber;
• operating chamber;
• afterburner;
• chimney

The logistics elements of production area are also provided, which include:

• trolleys for raw materials / charcoal;
• mobile platforms for moving of trolleys around the charcoal production complex;
• stationary platforms where charcoal cooling and loading of raw materialsmay take place;
• tipper of trolleys for unloading charcoal from trolleys.

For raw materials and finished charcoal trolleys are provided. Their number depends on the model, furnace configuration and operating conditions: the climatic conditions of the region, the size and humidity of the raw materials. All actions to move the trolleys are performed using an electric winch. Processchambers operate in “DRYING” or “PYROLYSIS” modes: a “RELOADING” mode is also provided. The automatic control system (ACS) determines the mode in the chamber “DRYING” / “PYROLYSIS” / “PYROLYSIS END” / “CHARCOAL READY. In addition, the ACS distributes the heat formed as a result of the combustion of pyrolysis gas released during the active phase of the PYROLYSIS process into other chambers that are in the passive phase of the process (DRYING or calcining of coal), this provides safety at all stages of the process. The automatic control system manages and monitors all the actions of the furnace, it also fixes all parameters, keeps logs of “temperatures and events”, personnel actions, etc. This makes it possible to comprehensively analyze and control equipment operation

CONTROLPANEL with “Touchscreen”



Main elements of furnace

  1. Firebox
  2. Сombustion chamber
  3. Afterburner
  4. Connecting flue with gate (сombustion chamber – afterburner)
  5. Flue
  6. Drying / pyrolysis chambers A & B
  7. Operating chamber
  8. Dampers of chambers A and B
  9. Gas collectors of chambers A / B
  10. Gates valves of pyrolysis gas for chambers A / B (butterfly valves)
  11. Gates valves of steam for chambers A / B
  12. The heat channels for chamber A / B
  13. Trolley rails
  14. Trolley in chamber

Logistic elements

Carbonization furnace EKKO

  1. Kiln
  2. Trolley
  3. Mobile platform
  4. Stationary overpass
  5. The cross over platform
  6. Rails for the mobile platform
  7. Preliminary dryer

There are two types of trolleys for mechanizing the processes of loading / unloading raw materials/charcoal–with end or top loading /unloading of raw materials/charcoal.For convenient loading of raw materialsand for cooling and stabilizing charcoal in the trolley, stationary platforms are used. It is also possibleto use aconveyor for loading raw materials into trolleys anda tipper for unloading charcoal from them. In thiscase, trolleys with top loading of raw materials willbe the most suitable option..

 Furnace performance

Furnace performance

The main factors affecting the productivity of the kilnare the moisture content and size of the raw material. To optimally prepare the raw material and achieve maximum efficiency, it is desirable to equip the kiln with additional equipment for preliminary drying. It can be the following units:

Chamber drying is more efficient than preliminary drying of raw materials in a trolley, although the latter is much more convenient in operation.

The recommended degree of drying is less than 20% humidity. A more efficient drying process brings double benefits:

      • economic – significantly reducing the duration of pyrolysis;
      • consumer and commercial – increasing the quality and yield of the final product.

Preliminary drying system for EKKO carbonization furnace 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 andincrease the productivity of the kiln from 50 to 100% when using “fresh” wood. Read more about dryers manufactured by GreenPower.

The productivity of the EKKO-2 and EKKO-4 furnaces, depending on the parameters of the raw material, tons / month of charcoal:

Name and indicators of raw materials ЕККО-1  ЕККО-2 ЕККО-4
Freshly sawn wood, abs. humidity 55%, t/month 13–18 * 15-20 * 30-40 *
Pre-dried wood, humidity up to 25% 20–30 * 25–35 * 50–70 *
Pre-dried wood, humidity up to 15% 25–35 * 30–45 * 60-90 *
Fuel briquettes, humidity 10% 30-40 * 40-50 * 80–100 *

* Productivity depends on the density and size of the feedstock.
* The highest efficiency of preparing biomass for carbonization is possible only in special equipment using thermal energy obtained during pyrolysis.

Increasing humidity (compared to the nominal level of 55%) significantly reduces production and increases the consumption of firewood from the oven. At 75% relative humidity (hardwood freshly cut during the sap flow period), productivity decreases by 15-20%. It is possible to increase the productivity of the oven by using Contact Drying, a device for the preliminary drying of raw materials.

Basic kiln parameters

Indicator Unit ЕККО-1 ЕККО-2 ЕККО-4
Maintenance staff for 1-3 kilns people 1-3 1-3 1-3
Electricity consumption, no more kWh 0,1 0,1 0,2
Consumption of firewood for the furnace, after exitingignition mode, no more* m3/day 0,1 0,1 0,2
Duty Cycle* hour 4–12 8-24 8-24
Weight т 4 5 10
Warranty service month 12 12 12

* The value of the parameters depends on factors influencing performance.

The following indicators affect the efficiency of a charcoal furnace:

      1. Humidity of raw materials. Increased humidity significantly reduces efficiency and increases the volume of firewood or other fuel for the firebox. So, when using hardwood just harvested during the movement of sap, the productivity can be reduced by up to 50%.
      2. The density of the material . For example, poplar having a minimum density requires less energy than a hornbeam, casuarina or iron tree with a maximum density.
      3. Sizes of pieces of wood or other raw materials.
      4. Theaccurate arrangement of raw materials in the trolley: it is recommended to stack large wood at the top, and small wood at the bottom of the trolley.

The transportation of a standard EKKO-2 charcoal kilnset is carried out in trucks (truck, TIR) with 40′ tilt trailers. The volume of the trailer must be not less than 86 cubic meters. It is also possible to transport two sets in such a vehicle, but only if the trolleys and other accessories are disassembled. . Equipment can be loaded into shipping containers (V 20 feet – 1 set, 40 feet – 2).


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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