AGICO manufactures fully automatic & large capacity biomass carbonization plants with a daily output of 8-25 tons. Our advanced carbonization plants enjoy ex-factory prices.

PLC Controlled

Environmental Friendly

Ex-factory Price


carbonization rotary kiln agico

What is carbonization? Biomass carbonization is the first step in the production of activated carbon. In the carbonization process, biomass materials are gradually heated under a certain low temperature and air isolation conditions so that the non-carbon substances in the material are reduced, finally producing carbonaceous materials suitable for the following activation process.

AGICO is a professional activated carbon plant supplier. We mainly adopt activated carbon rotary kiln and advanced carbonization process to realize high-efficiency biomass carbonization. In our biomass carbonization plants, we offer indirect-fired carbonization rotary kiln and direct-fired carbonization rotary kiln, two different carbonization processes for customers to choose from.

indirect fired carbonization kiln

Indirect-fired Carbonization Rotary Kiln

When the biomass material is carbonized in the rotary kiln, a large amount of volatile gas is precipitated. These gases enter the incinerator through the pipeline to be heated and burned and then are fed back to the heating jacket outside the carbonization kiln to provide heat for the carbonization process through thermal radiation, so there is no need to provide additional heat sources.

direct fired carbonization kiln

Direct-fired Carbonization Rotary Kiln

When the biomass material is carbonized in the rotary kiln, a large amount of volatile gas is precipitated. The combustion point on one side of the kiln heats the gas and the gas heats the material by high-temperature radiation. The material in the bottom of the kiln is micro-oxygen contact, and will not be burnt out. An open flame is burning at the kiln top.

If you have any questions or want to get a quotation directly, please contact us in time. For your production needs, we will provide you with perfect solutions and detailed quotations!

Biomass Carbonization Process

biomass carbonization process layout agico

The biomass carbonization process can be divided into two parts: biomass material carbonization and secondary utilization of exhaust gas.

1. Biomass Material Carbonization

Biomass material carbonization mainly takes out in a carbonization rotary kiln. In the kiln, the biomass material is gradually heated, and then undergoes a series of physical changes (dehydration and degassing) and chemical changes (polycondensation and pyrolysis). Finally, the carbonized material with a primary-pore structure is formed.

The appearance of the carbonized material should meet certain specifications and shape requirements, the internal structure must be the primary-pore structure, and at the same time, it should have high mechanical strength. The carbonization process can be divided into the following stages:

Drying Stage (<150℃):

At this stage, the external moisture and internal moisture of biomass raw materials evaporate by the heat supplied from the kiln, and the shape of the raw materials does not change at this time.

Pyrolysis Stage (150-300℃):

Raw material begins to decompose and releases gaseous products (such as CO, CO2, H2S, etc.), in addition to this, the chemical composition of the raw material begins to change. Different materials start pyrolysis at different temperatures.

Carbonization Stage (300-650℃):

Through polycondensation and thermal decomposition reactions, a large amount of volatiles is precipitated from the raw materials, such as tar, methanol, and ethylene. The material gradually softens and melts to form a colloid with three phases of gas, liquid, and solid coexisting. After that, it is transformed into semi-coke, needle semi-coke, or block semi-coke through the processes of flow, polycondensation, and solidification.

Cooling Stage (<50℃):

After the carbon is produced, it is rotated and discharged through the cooling tube on the rotary kiln, and then enters the water cooler, where it is water-cooled for about 3 minutes in an oxygen-free state. After that, it gets into the finished product silo through a closed air conveying device.

2. Secondary Utilization Of Exhaust Gas

The exhaust gas produced in the biomass carbonization process is mainly composed of two parts: the high-temperature gas produced by fuel combustion and the volatile components produced by material thermal decomposition. These gases contain small amounts of harmful substances, so they need to be treated before being released into the atmosphere.

AGICO carbonization plant mainly adopts combustion methods to treat exhaust gas. After the exhaust gas is discharged from the rotary kiln, it is sent into an incinerator to be fully burned at 800-950 ℃, so that the combustible gas and harmful substances are all transferred into CO2. The heat generated by combustion can be recovered by the waste heat boiler to generate steam.

AGICO Biomass Carbonization Machine

All production equipment in AGICO biomass carbonization plant adopts a PLC control system, which has small labor demand, controllable production quality, and safe operation.

Main Equipment Configuration: bucket elevator, screw feeder, feed bin, carbonization rotary kiln, waste heat boiler, cyclone dust collector, bag filter, water cooler, PLC control system cabinet, incinerator, draught fan, spray tower, chimney, etc.

carbonization rotary kiln agico
Carbonization rotary kiln
carbonization plant waste heat boiler
waste heat boiler
cyclone dust collector agico
cyclone dust collector
feed bin agico
feed bin
water cooler agico
water cooler
bucket elevator agico
Bucket elevator
carbonization plant combustion chamber
draught fan agico
draught fan
burner agico
bag filter agico
bag filter

* All of the above equipment is optional and customizable. The configuration is according to the customer’s production needs.

Raw materialMoisture<15%; Granularity:1-20cm; Ash<3%;
Finished carbonized materialMoisture<1%; Ash<5%; Volatile component:15-18%; Granularity:1-10cm;
Discharge temperature350-400℃
Temperature after cooling<50℃
Total power<100kW
Steam volume1.5-3t/h (saturated superheated steam)
Steam pressure8kg
Steam flow rate1.5-2.2t/h
Carbonization kiln inside temperature<650℃
Flue gas incinerator temperature800-950℃
Induced draft fanPower:40kW; Air volume:35000m³/h; Wind pressure:2530mpa;
Feeding methodElevator & Screw feeder
Carbonization conditionAnoxic carbonization
Dust removal methodCyclone dust collector + Bag filter + Spray system
Cooling methodRotary kiln cooling pipe + Water cooling device
Equipment materialQ345 heat-resistant steel
Refractory materialSteel wire fibre castable,High aluminum refractory brick
Insulation thickness>40cm
Refractory material aluminum content>45%
Refractory material temperature resistance>1300℃
Flue gas volume15000m³/h
Temperature sensing thermocoupleQuantity:5; Temperature resistance>1200℃;
Carbonization Rotary Kiln Size (m)Capacity (t/d)

The output and equipment configuration of the AGICO carbonization plant can be customized according to the customer’s production needs.

AGICO carbonization rotary kiln adopts a special lifting plate design so that the material is heated evenly and the heat transfer efficiency is improved.

The whole carbonization plant adopts a PLC control system to realize automatic and efficient production, which can effectively avoid the probability of failure.

Our carbonization plant uses thermal radiation to heat the biomass material. The temperature can be adjusted by mixing high-temperature exhaust gas with low-temperature exhaust gas.

Part or all of the heat source comes from the heat released by the volatile gas combustion. The exhaust gas discharged after carbonization is recycled by the heat exchange device for drying and activation processes.

Highlights Of AGICO Biomass Carbonization Plant

Successful EPC Projects

Pakistan carbonization plant agico
Pakistan Biomass Carbonization EPC Project
Russia carbonization plant agico
Russia Biomass Carbonization EPC Project
Uzbekistan carbonization plant agico
Uzbekistan Biomass Carbonization EPC Project
yunnan biomass carbonization
Yunnan Biomass Carbonization EPC Project
LocationProjectQuantity (set)Annual Capacity (t)Cooperation MethodDate
ThailandBiomass carbonization plant14000EPC2015
GuangzhouBiomass carbonization rotary kiln12000EPC2015
UzbekistanBiomass carbonization plant11500EPC2016
PakistanBiomass carbonization plant18000EPC2017
YunnanBiomass carbonization plant26000EPC2018
RussiaBiomass carbonization plant110000EPC2019
IndiaBiomass carbonization plant18000EPC2020
NigeriaBiomass carbonization plant14000EPC2021
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