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US 5,635,122 AGranted
Process for disposing of refuse which includes pathogenic components
AssigneeVomm Impianti E Processi S.P.A.
InventorCorrado Vezzani
Life of this patent
Estimating the term…
Abstract
A process is described in which hospital refuse is comminuted to a powder-like consistency or at least so as to be capable of being pumped and subsequently subjected to heat sterilisation treatment in a highly turbulent dynamic thin layer.
Claims17
A method for disposal of hospital refuse and refuse including pathogenic components, comprises the steps:
- comminuting said refuse to obtain a comminuted material which can be pumped;
- feeding a continuous flow of said comminuted material to a turbosteriliser;
- said turbosteriliser having a cylindrical tubular body provided with a heating jacket and inlet and outlet apertures for material to be treated and treated material respectively, and a paddle rotor rotatably supported within the cylindrical body and driven to rotate at 400-1500 revolutions per minute, said cylindrical body having internal cylindrical walls heated to a temperature of 200.degree. to 500.degree. C.;
- centrifuging said comminuted material to form a thin turbulent layer which is caused to flow continuously in contact with said heated walls towards said outlet aperture, thereby simultaneously sterilising said comminuted material;
- and
- cooling and recovering said sterilised comminuted material to produce sterilized comminuted material and subsequently delivering it to a discharge.
3 more elements
A method for disposal of hospital refuse and like refuse including pathogenic components, comprising the steps of
- comminuting said refuse to obtain a comminuted material which can be pumped;
- feeding a continuous flow of said comminuted material to a turbosteriliser;
- said turbosteriliser having a cylindrical tubular body provided with a heating jacket and inlet and outlet apertures for material to be sterilised and sterilised material respectively, and a paddle rotor rotatably supported within said cylindrical body and driven to rotate at 400-1500 revolutions per minute, said cylindrical body having internal cylindrical walls heated to a temperature of 200.degree. to 500.degree. C.;
- sterilising said comminuted material by centrifuging said comminuted material to form a thin turbulent layer which is caused to flow continuously in contact with said heated walls toward said outlet aperture;
- drying said comminuted material during said sterilising step by introducing a flow of saturated steam into said turbosteriliser and directing said saturated steam through said comminuted material;
- removing said steam from said turbosteriliser after said steam has been directed through said comminuted material, and subjecting said removed steam to sterilisation at a pressure of 10 to 12 atmospheres and condensation;
- and
- cooling and recovering said comminuted material and delivering said comminuted material to a discharge.
5 more elements
A method for disposal of hospital refuse and like refuse including pathogenic components, comprising the steps of
- comminuting said refuse to obtain a comminuted material which can be pumped;
- feeding a continuous flow of said comminuted material to a turbosteriliser;
- said turbosteriliser having a cylindrical tubular body provided with a heating jacket and inlet and outlet apertures for material to be sterilised and sterilised material respectively, and a paddle rotor rotatably supported within said cylindrical body and driven to rotate at 400-1500 revolutions per minute, said cylindrical body having internal cylindrical walls heated to a temperature of 200.degree. to 500.degree. C.;
- sterilising said comminuted material by centrifuging said comminuted material to form a thin turbulent layer which is caused to flow continuously in contact with said heated walls toward said outlet aperture;
- drying said comminuted material during said sterilising step by introducing a flow of steam into said turbosteriliser and directing said steam through said comminuted material;
- removing said saturated steam from said turbosteriliser after said steam has been directed through said comminuted material, and subjecting said removed steam to sterilisation at a pressure of 10 to 12 atmospheres and condensation;
- receiving said comminuted material from said outlet aperture of said turbosteriliser and further sterilising said comminuted material by subjecting said comminuted material to heat at 100.degree. to 300.degree. C.;
- and
- mixing said sterilised and dried comminuted material with said sterilised and condensed steam to obtain a paste which is subsequently subjected to briquetting, and delivering said paste for discharge;
- said mixing being performed in a turbocooler which includes a second cylindrical tubular body provided with a cooling jacket, a first inlet opening for receiving said sterilised and dried comminuted material from said outlet aperture of said turbosteriliser, a second inlet opening for receiving said sterilised and condensed steam, and a discharge opening for said paste, and a second paddle rotor rotatably supported within said second cylindrical body and driven to rotate at between about 100.degree.-200.degree. revolutions per minute.
7 more elements
Dependencies are inferred from the claim text.