BGR130
Biogreen demonstration unit in container
The concept on which we are working
is built on the fact that bulk part of the waste
contains a strong energy potential
which is expressed in the form of calorific value of the materials
This refers to the biomass, wood, plastics and municipal wastes.
The idea is that this energy potential
is expressed in the available, transportable
and therefore, in the form of combustible.
Here we have our Biogreen demonstration unit
which is a containerized unit created for the Race for Water Foundation
The container is composed by three parts
The first part: process
The second part: command and controls
And the last part, with the engine that produces our energy by using the syngas
In this area here we are feeding the system with pieces of plastics (PE, PP) so they can be shredded
Here is the shredder where the plastics are cut into the size suitable to feed into the equipment
afterwards they are transported here and stocked in this buffer tank.
The shredded plastics are taken from here and lifted by this screw conveyor up to the feeding section.
The shredded plastics is arriving here
from where it is heading to the dosing screw
which regulates the mass flow to the machine.
Here we have the heart of the system - Spirajoule
to which the material arrives, and is heated
by the hollow shaft screw, in temperature of 800 degree Celsius
without oxygen, in order to perform pyrolysis process
and transported in the same time with the same screw
which is heated thanks to the Joule effect, by electricity
just like in the radiative heater.
The material is be transformed into gas, which we call hot syngas
which is maintained in hot state in first part of the piping
and then cooled in two stages
the first one consisting cooling with pulverisation
and second, heat exchanger with the cooling water circuit.
Once being cooled, the gas will pass through the three-direction valve
which allows to direct it either into next stages of process
or, in case of security,
into the emergency chimney to put the equipment into the security stop mode.
In the further process, the cold syngas will be cleaned
which begins with the deoiling process
which allows to remove the micro-drops of oil from syngas
and afterwards, to the activated carbon filter
to thoroughly clean any impurities and pollutants.
After the filter, we have an oxygen sensor
that continuously measures the oxygen content in syngas to ensure the correct process conditions.
Further, we have an extraction fan
which allows to maintain very light underpressure inside the Spirajoule
and to keep the gas in the movement.
And here we have the panel of fluids and media
The nitrogen is connected to the Spirajoule and cooling screw
Compressed air for the control of the valves
and industrial water to spray on the char transported in cooling screw.
The condensable part of the gas arrive into this piping
and is extracted by this pump, filtered and cooled
and recirculated to the top of the condenser to cool down the gas.
The solid part of the product which have not been transformed into gas,
is extracted by this rotary valve
which creates an airlock preventing the oxygen access to the inside of the process.
The rotary valve will transfer the char into the cooling screw
which will transport further the char
and will cool it down thanks to pulverising with water
in order to finally stock it into this tank.
After the extraction fan, the cold syngas arrives here
where we can either send it to the engine which produces electricity with a piloting dose of diesel
or to the oxidiser, to eliminate it in phase of startup or shutdown of the engine
Here we are in the command and control part
which consists of the control cabinet to pilot our principal process
covering the water chiller, transformer of current, controls of the oxidiser
as well as all the control of syngas and fluids.
This is the principal screen to pilot the Biogreen process
with its first page, where we can oberve all the temperatures inside all the line
with a possibility to manage all the system parameters
like the residence time of the product inside the machine or the temperature of treatment
also we can control other parameters like speed of the extraction fan
or the temperature of the heaters further transporting the gas
which are equally important part of the process.
