A clean technology for the treatment of medical waste combining, in a continuous processpowerful shredding with dry and microwave core-heating of waste.

A highly productive technology for the treatment of sizeable deposits.

Slow, highly powerful shredding on 4 axles with trap and unshreddables management; shredder situated upstream and chemically decontaminable.

A microwave system for continuous thermal procesing that uses no steam or waterand does not emit any liquid or solid rejects in the atmosphere, no any radiation or odour.

Sifting of homogenates to obtain a very fine grading.

Production of a very dry decontaminated homogenate, potentially recoverable and recyclable.

100% ecological technology with zero pollution.

Process (Step)

1. A container (660 or 750 liters) is installed on the handling system (2°). The latter lifts up the container after weighing (1°) and dumps it in the loading hopper (3°). All these operations occur automatically.

 

2. Thanks to a hydraulic cylinder, the loading hopper opens automatically when a container arrives. The loading hopper has an air treatment vessel (9°, only on the Serial 250 - Ecosteryl, which creates a vacuum when it is opened. This one prevents the dust from flying when the hopper is opened. The airflow is washed, disinfected, deodorized and filtrated over activated charcoal. The airflow is rejected outside only after this treatment. The treated airflow is of about 250 m³/h. The hopper also includes level indicators (hopper full and hopper empty).

 

3. When the lid of the loading hopper is closed, the content of the loading hopper is gradually pushed by a hydraulic pusher (11°) and the shredder (4°) of 37 kW is activated. A screen is placed under the latter to get a homogenous size under 20 mm diameter. The shredder is of the 4 axles type including an automatic anti-blocking device (possible thanks to a current’s control): reversing of the direction of the operation of the two motors in case of blockage (but also cyclical) in order to unblock the unit and return it to the normal operation.

 

4-axles shredder

 

4. The homogenate waste is then conveyed in the under-mill hopper before passing to the processing screw, which brings it to the second phase of the process. This under-mill hopper also includes level indicators.

 

5. The processing screw is of spiral type. It is enclosed in a tube with a diameter of 110 mm. The processing screw brings the products into the microwave oven where it is heated up to a temperature of 100°C. The time needed for transferring it into the processing screw is of about 3 min. The microwave-heating tunnel (5°) is composed of 2 boxes beam of 12 kW (1 box only for Ecosteryl 125). Each box beam includes 6 microwave generators (magnetrons) of 2 kW. The “Box Beam” patent covers the use of microwaves in stereo mode with controlled field polarization in a specially adapted recess. This makes it so possible to heat the products “to the core” with a rapid rise in temperature. The system provides for a temperature measurement at the Microwave outlet to check the treatment quality. A control system adjusts the operation of the equipment in order to maintain the desired temperature at the end of the zone (the microwave power and the screw speed are controlled).

 

6. The waste gets into the last hopper where its temperature is maintained (capacity of 500 l). The heat-insulated hopper (7°) is kept at its temperature level thanks to external heating resistors. The waste stays in this hopper for one hour so that the decontamination can be achieved.

 

7. When this time is over, the waste leaves the equipment through an outlet screw (8°) (of the spiral type) in a container.

 

8. A programmable controller (10°) with a touch-screen allows the automatic operation, real-time monitoring, control and storage of the equipment operating parameters.

 

Note 1: All accesses to potential hazardous sites are protected by safety switches.

Note 2: All metal structures are made of stainless steel (hoppers, screws, etc.).

 

 

Ecosteryl 125