Title of Invention

"MICROWAVE DISINFECTING SYSTEM FOR HOSPITAL WASTE"

Abstract

This invention relates to a microwave disinfection system for hospital waste comprising a housing which houses two magnetrons source (1,2) of 1.5kW with associated control and interlock circuitry (9),low power supply (10), cooling arrangements (11,12) filament supply (4,5) and high voltage power supply (6,7) to generates microwave power at a nominal frequency of the order of 2.45 GHz; a cavity (3) wherein bucket (8) containing hospital waste is kept on a turn table provided within the cavity which is designed to uniformly expose the hospital waste to high power microwave energy; a water spray (13) to sprinkle water on waste; a water ejector system (18) to absorbs the water vapours coming out of waste.

Full Text

FIELD OF INVENTION This invention relates to a microwave disinfection system for hospital waste. PRIOR ART The safe disposal of infectious/hazardous wastes, which are generated by hospitals, laboratories, animal research facilities and other institutional sources, has become an issue of paramount importance in all industrial countries in recent years. Among the various methods recommended for the disposal of infectious waste, i.e. incineration, autoclaving, deep burial, etc. but which are attended with disadvantageous without heating the surrounding structure. Microwave energy penetrates and heats the entire material at nearly the same rate. Thus, the heating is more uniform throughout the material and not entirely dependent on the thermal conductivity of the material. Because of this, Microwave heating can do a job faster. It can convert the infectious waste to municipal waste, which is then disposed off with other wastes. OBJECTS OF THE INVENTION An object of this invention is to provide a microwave disinfection system for hospital wastes. Another object of this invention is to provide a microwave disinfection system for hospital wastes which is efficient. Yet another object of this invention is to provide a microwave disinfection system for hospital wastes which can advantageously be employed against all possible die hard bacterias. Still another object of this invention is to provide a microwave disinfection system for hospital wastes which is environment friendly as it involves no incineration and thus ensures that no toxic fumes escape into the atmosphere. There is also no liquid discharge from the system and operation is neat. Further object of the present invention is to propose a microwave disinfection system which can be easily installed within the hospital campus, right at a place where waste gets generated, thereby avoiding the need for transportation of infectious waste from one place to another. Still further object of the present invention is to provide a microwave disinfeciton system, which involves low operating cost for disposal of waste. Yet further object of the present invention is to provide a microwave disinfection system which does not require any separate real estate or any costly installation. STATEMENT OF INVENTION According to this invention there is provided a microwave disinfection system for hospital waste comprising a housing which houses two magnetrons source with associated control and interlock circuitry, low power supply, cooling arrangements filament supply and high voltage power supply, a cavity wherein bucket containing hospital waste is kept on a turn table provided within the cavity which is designed to uniformly expose the hospital waste to high power microwave energy, a water spray to sprinkle water on waste, a water ejector system to absorbs the water vapours coming out of waste. DESCRIPTION OF FIGURES The invention will now be illustrated with drawings, which is an illustrative embodiment of the present invention and is not intended to be taken restrictively to imply any limitation on the scope of the present invention. Pig. 1: shows the block diagram of system; Fig.2: shows the exploded view of the system; DESCRIPTION OF INVENTION w.r.t. DRAWINGS Referring to fig.l, the system of the present invention comprises a housing having two magnetrons (1,2) of at least 1.5 kW with control and interlock circuitry (9), and power supply source (10). Each of said magnetrons (1,2) uses a filament supply (4,5) and high voltage power supply (6,7) to generate microwave power at a nominal frequency of the order of 2,45 GHz. Each of the magnetron source (1,2) has a cooling arrangement (11,12) for air cooling. For this purpose, blowers have been provided for removal of heat from its anode block. A cavity (3) is provided which operates at a nominal frequency of 2.45 GHz. Infected waste is put in a bucket (8) which is made out of low loss tangent high density polypropylene material. The said bucket (8) is kept on a turn table inside the cavity (3) after sprinkling with water by water spray (13). The sprinkling of little water on waste enhances the absorption of microwave into it. The water ejection system (18) absorbs the vapours coming out of waste. The design of cavity (3) and turn table inside the cavity is optimized in such a way that waste inside the bucket gets uniformly exposed to high power microwave energy. The said magnetrons (1,2) are fitted to cavity, in optimized positions with a flange. The feeds to the cavity are so placed that there is no direct coupling between them, which otherwise leads to the failure of the magnetron. The magnetron is biased for the power output of 1.5kW. Adequate interlock circuits have been incorporated to safeguard the system as well its operation. Referring to fig.2, the total system is accommodated in a rack, which is divided into four compartments adjacent to the cavity. The bottom compartment (14) accommodates the turntable drive arrangement to rotate the bucket placed inside the cavity when the system is in operation. The left and right side compartments (15,16) accommodate magnetrons with blower fitted, high voltage power supplies consisting primarily of a single phase step-up transformers and a rectifier assembly, filament voltage/current sense cards, filament transforms, current transformers and filament interlock relay's etc. The top/control panel compartment (17) accommodates distribution board, low voltage power supply, control 85 interlock circuitry, blower to remove steam form cavity and other components. It is to be noted that present invention is susceptible to modifications changes and adaptations by those skilled in the art. Such variant embodiments incorporating the concepts and features of the present invention, are intended to be within the scope of the present invention, which is further set forth under the following claims: WE CLAIM: 1. A microwave disinfection system for hospital waste comprising a housing which houses:- (a) two magnetrons source (1,2) of 1.5kW with associated control and interlock circuitry (9),low power supply (10), cooling arrangements (11,12) filament supply (4,5) and high voltage power supply (6,7) to generates microwave power at a nominal frequency of the order of 2.45 GHz; (b) a cavity (3) wherein bucket (8) containing hospital waste is kept on a turn table provided within the cavity which is designed to uniformly expose the hospital waste to high power microwave energy; (c) a water spray (13) to sprinkle water on waste; (d) a water ejector system (18) to absorbs the water vapours coming out of waste. 2. A microwave disinfection system for hospital waste as substantially described and herein illustrated.

Documents:

916-DEL-2002-Abstract-(19-07-2010).pdf

916-del-2002-abstract.pdf

916-DEL-2002-Claims-(19-07-2010).pdf

916-del-2002-claims.pdf

916-DEL-2002-Correspondence-Others-(07-09-2009).pdf

916-DEL-2002-Correspondence-Others-(19-07-2010).pdf

916-del-2002-correspondence-others.pdf

916-del-2002-correspondence-po.pdf

916-del-2002-description (complete).pdf

916-del-2002-drawings.pdf

916-DEL-2002-Form-1-(19-07-2010).pdf

916-del-2002-form-1.pdf

916-del-2002-form-18.pdf

916-del-2002-form-2.pdf

916-del-2002-form-3.pdf

916-del-2002-form-5.pdf

916-DEL-2002-GPA-(19-07-2010).pdf

916-DEL-2002-Petition 137-(19-07-2010).pdf