A Polish inventor has developed an innovative vehicle for burning rubbish on its way to a waste dump. The main advantage is that the solution will reduce the volume of waste collected on waste dumps. The inventor is looking for companies and researchers working in waste management for manufacturing, license, or technical cooperation agreements for further development and to bring the innovation to market.
Characteristic for this new dustcart is that loaded waste is a subject to a pyrolytic gasification process. Garbage truck can be loaded from both sides (left & right). Containers are lifted by the hoists. After opening the main hatch, wastes are loaded to the main reservoir, after closing the main hatch, the inner hatch opens which allows to transport wastes to the gasifier. The walls of the gasifier are made of materials resistant to high temperatures.
Thereafter, the inner lid is also shutting down. Double flap system provides a control of the amount of “false” air getting inside and provides the gas from getting outside of the gasifier. Biomass gasification process is divided into several stages - drying, pyrolysis, combustion and reduction. Each of them takes place in a different zone of the gasifier. Drying zone is at the top. At this stage of gasification, under the temperature of 100-300°C, evaporation of waste containing up to 50% humidity begins. Under the drying zone is a pyrolysis zone. Chemical processes take place here at 300-750°C with no or small presence of the air. Pyrolysis products are: solid fractions (including coke and semi-coke), liquid products as tars and oils (which in a later process, due to high temperature, are transformed mostly into the gaseous state), and combustible gas. Incineration of waste takes place in a combustion zone, at a temperature above 750 ° C. The process is initiated by flame from a nozzle powered by a producer gas from a tank located under the chassis. The tank filled with pyrolysis gas. At the upper part of the combustion zone are orifices, through which specific amount of the air is provided to the above-mentioned zone. This is done by air installation. Unburned because of insufficient amount of air wastes are lowered fill the reduction zone (the space between the combustion zone and a grate). When process is finished, pyrolytic coke and other unburned substances can be found on the grid. As a result of the above-described process, volume of loaded into the gasifier municipal waste decreases from 65 to 75%.
The Dustcart has a rotary grate what allows pyrolytic coke and other residues to be discharged to the ash, after what they are being automatically removed by fire-retardant conveyor belt. After pyrolytic gaseous products passes the combustion and the reduction zones (as a result of chemical processes taking place in those zones) a producer gas is being derived. From the reduction zone gas passes through the space between the body and the reservoir to the gasifier. It gives away its heat to the walls of the tank and the body. Thereafter it is cooled down to a temperature of 300-400 ° C. The gas leaving from the generator is heavily contaminated with large amounts of various mechanical admixtures, therefore a gas conduit is supplied to the assembly of two cyclones , which are arranged sequentially one after the other.
On the gas line, before the entrance to the cyclone is a compensator, which due to the possibility of elastic deformation, provides necessary tightness of the gasifier purifier (cyclone). After gas enters the cyclone, it is being swirled, and by its movement direction is rapidly changed, whereby the heaviest dirt particles are being rejected by centrifugal force to the wall of cyclone and they fall to the dust container from where they should be removed periodically. This can be done through a door located on the side walls of the garbage truck. In cyclones the gas gets rid of 50 % of dopants, and the motor gets cooled down to a temperature of 280-300 ° C.
There is a hatch in the rear wall of the gasifier that allows entering inside to carry out periodic inspection of the unit or to clean it. An extension ladder in the back of the truck provides an easy access to this hatch. The available data indicates that from kilogram of municipal waste it is possible to receive up to 0.6 kg of pyrolytic gas and 0.4 kg of pyrolytic coke.
Type and Role of Partners Sought:
- Type of partner sought: Industry
- Specific area of activity of the partner:
Partner with good market accessibility in the waste (rubbish) field, as well as the financial means to support the project.
- Task to be performed by the partner: Work together to bring the product to market and to test new applications during technical cooperation, available license and/or manufacturing agreement after developement phase