AU7032601A - Incineration process and incinerator using heat generated from combustion to bake and sublimate waste to produce gases using as fuel for the burning - Google Patents

Description

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant(s): MANOP PIYASIL SOMJIT PIYASIL Invention Title: INCINERATION PROCESS AND INCINERATOR USING HEAT GENERATED FROM COMBUSTION TO BAKE AND SUBLIMATE WASTE TO PRODUCE GASES USING AS FUEL FOR THE BURNING The following statement is a full description of this invention, including the best method of performing it known to me/us: c I 2 INCINERATION PROCESS AND INCINERATOR USING HEAT GENERATED FROM COMBUSTION TO BAKE AND SUBLIMATE WASTE TO PRODUCE GASES USING AS FUEL FOR THE BURNING Field of the invention The present invention relates to a process and an apparatus for incineration waste. More particularly, the invention relates to an incineration process and an incinerator using heat generated from combustion to bake and sublimate waste to produce gases using as fuel for burning.

State of art of the invention The development of incinerators begins with a single compartment incinerator which, usually consists of a burning chamber which injects fuel mixed with air into the chamber filled with waste. This kind of incinerator is still in use at present, especially the small-sized ones used in factories and hospitals. One problem with this kind of incinerator is that the temperature within the burning chamber, approximately 400-500° C, is low so there will be polluting substants resulting from incomplete combustion. The cause of low temperature comes from the loss of heat in the burning chamber through the evaporation which takes place before the waste is dry and inflamed. Since this is a loss of energy, the later models of incinerators are composed of two separated burning chambers: waste burning chamber and gas burning chamber.

The gas burning chamber added will make the inflammable gas created from the burning of waste bum at a higher temperature, which, in turn, makes the burning of waste more complete. At present, the two-chamber incinerator has the waste burning chamber and gas burning chamber completely separated from each other. As for the waste burning chamber, the heat generated will make waste dry and release inflammable gas. The reactions that take place, both the burning of already dry waste and the release of inflammable gas and heat, will be used in the subsequent evaporation process and the release of gas.

These reactions lower the temperature, so gasoline is needed to raise the temperature to the appropriate level. Some part of inflammable gas generated will be burned in the process. The rest will be passed to the gas burning 4.

-3 chamber. However, the concentration of the gas is not high enough to ignite the flame, so fuel is needed to increase the temperature to the appropriate level for burning and destroying poisonous gas that results, loss of energy.

Technical nature of the invention In view of the foregoing, the present invention has been made, and an object of the invention is to provide an incinerator which, uses heat generated from combustion to bake and sublimate waste to create gas for burning. Said incinerator is particularly des'gned to allow waste inside the incinerator to receive the heat generated from combustion to bakce and sublimnate waste to create gas which is then used as fuel for the incineration. The waste baking chamber formed into a cylindrical shape and the gas combustion chamber is a duct located in the middle of the waste baking chamber. This is designed so that the baking process and the burning process of waste can be separated from each othcr. Thecat which, has already been baked is burned in the charcoal burnling chamber which, is at the bottom and formed in to a conical shape .connected to the waste baking chamiber, .lt is also supported by the bottom grate which is characterized by grates assembled into an overturned cone.

Inflammable gas will be drawn through the gas duct to be used in the burning of waste in the burning chamber. The burning process using inflamumable gas will not be combined with the burning of waste in the burning chamber. As a result, inflaimmable gas will be totally used in the burning chamber without the use of any other fuel because there wilfl be a sufficient quantity of gas needed.

High heat generated from the burning of gas will be used in the baking process without complicated equipment required. Further, the ash from the burning chamber will fall from the bottom grate to the ash collecting tray by jet pulse of compressed air at regular intervals.

In addition, the invention also provides an incineration process operate consistently with less emission gases at the initial stage. The initial step requires the use of gasoline to make the temperature high enough to bake the waste until dry enough to release inflammable gas. After that, gasoline is no longer needed. The burning of baked waste that releases inflammable gas is 4similar to the burning of charcoal in which less polluting gas generated because of the high temperature in the incinerator.

Brief Description of the Drawings In the complete disclosure of the incinerator in this invention, the composition of the incinerator will be illustrated as follows: Figure 1: Illustration of a small-sized incinerator.

Figure 2: Illustration of a large-sized incinerator.

Detailed description of the preferred embodiments Hereinafter, an incinerator according to a preferred embodiment of the present invention will be described with reference to the drawings.

The materials used in the assembly of the incinerator consist of heat and corrosion resistant metal. As shown in figures 1 and 2, waste will be fed through the top of the incinerator with the screw feeder 1, the screw is connected to a motor at the end of the tube, while the other end of the screw does not reach the other end of the tube, thus leaving space to compact waste before put out into the incinerator. That is to prevent the back flow of vapor and gas through the screw. Waste will be fed into the waste-baking chamber 2 which formed into a cylindrical shape. In the middle of the baking chamber, there is a gas burning chamber 6 which is a vertical duct located at the center of the waste-baking chamber 2 to generate heat used in the baking process. The charcoal-burning chamber 3 is connected to the waste-baking chamber 2. Its bottom part formed into a conical shape to force waste into the middle, right beneath the middle duct which acts as a gas burning chamber 6. Waste in the charcoal-burning chamber 3 will fall onto the bottom grate 5 which is circular in shape, with the top part shaped like a funnel 16 and connected to the bottom grate 5 whose teeth are tilted at 30 to 35° to allow ashes to easily move from the charcoal burning chamber 3, with the jet pulse of compressed air, to the ash collecting tray 17, a funnel at the bottom of the incinerator.

In this process, the primary air is generated from the first air blower (not shown) to the first air duct 15 which separates air into two parts: that sent to the 5 bottom grate 5, a funnel with air hole on the top; and, that sent to the side grate 4 connected to the funnel collecting waste from the waste-baking chamber 2.

At the bottom edge, there is room for air to circulate and air-feeding holes around it.

The secondary air comes from the second air blower (not shown) to the second air duct 9, and it will be injected into the gas burning chamber 6, passed through the main duct 11 connected to the gas sucking duct 10 which sucked the gas and vapor from collecting compartment 12. Because the gas and vapor collecting compartment is an overturned funnel above the side grate four, there is an empty space between the gas and vapor collecting compartment and the side grate. As the secondary air is injected into the gas burning chamber 6, the velocity of the air in the duct 9 will create the venturi principle in the main duct 11 which results in gas and vapor being sucked from the waste baking chamber 2 through the gas collecting duct 13, a welded duct running along the top of the waste baking chamber 2, to the gas collecting compartment 12. Gas and vapor will then be sucked through the gas sucking duct 10 to the main duct 11 and subsequently injected into the gas burning chamber 6 together with secondary air for combustion.

The gas burning chamber 6 is a vertical duct with the bottom end located on the top of the charcoal burning chamber 3 and placed at the center of the waste baking compartment 2. Inside the gas burning chamber 6, at the bottom there is an orifice plate 7 which is a ring with the outer part welded with the inner part of the duct thus leaving a smaller hole in the middle to reduce the cut surface of the chamber 6. This enables the gas and air to mix well which, in turn, leads to a more complete combustion, as well as increases the temperature of the burning process. The burning of gas will continuously take place in the gas burning chamber 6, for the incinerator with a too small waste baking chamber 2 (as shown in Figure the gas will be released outside. But, if the waste baking chamber 2 is large, hot gas will be passed through the hot gas duct 8 welded into the outer side of the baking chamber 2 (as shown in Figure 2) to increase the effectiveness of the baking process. Inside the waste- 6 baking chamber 2, there is a waste-stirring machine 19 which is a screw connected to 4 or more long axles that run from the top to the bottom of the waste-baking chamber 2. This waste-stirring machine 19 stirs the waste m the waste baking chamber 2 to increase the efficiency of the baking process. The outer part of the incinerator will be insulated 14 to prevent loss of heat.

During start up the incinerator, fuel is used to ignite the combustion. It will be sent through a duct and injected to the top of the main duct 11. As the ignition starts, the fuel will be burned in the gas burning chamber 6 until it reaches the temperature of approximately 800 to 9000 C. The waste will continuously emit inflammable gas which, will then flow to the gas burning chamber 6. When the temperature in the gas burning chamber increases, the injection of fuel will be stopped.

While the preferrcd embodiment of the present invention has been described using specific terms, such description is for illustrative only, and it is to be understood that changes and variation may be made without departing from the spirit or scope of the following claims.

In this specification, except where the context requires otherwise, the words "comprise", "comprises", and "comprising" mean "include", "includes", and "including", respectively. That is when the invention is described or defined as comprising specified features, various embodiments of the same invention may also include additional features.

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Claims (12)

1. 2. The process according to claim i, further comprising a step of stirring waste by a stirring means in the waste-baking chamber to increase the efficiency of the baking process.
2. 3. The process according to claim 1 or 2, wherein said the burning process of the inflammable gas generated from the waste in the gas burning chamber comprises steps of: blowing the primary air from the first air blower to the first air duct, and separating into two parts: one is sent to the bottom grate, and the other is sent to the side grate connected to the funnel collecting waste from the waste-baking chamber; at the bottom edge, there is H:\HelenF\Keep\speci\P43245 doc 10/9/01 II a~N~s~v~~ 8 room for air to circulate and air-feeding holes around it; blowing the secondary air from the second air blower to the second air duct and' injecting into the gas burning chamber, passing through the main duct connected to the gas sucking duct which sucked the gas and vapor from collecting compartment, then gas and vapor being sucked from the waste-baking chamber through the gas collecting duct to the main duct and then being subsequently injected into the gas burning chamber together said secondary air, mixing well gas and air with an orifice plate for a more complete combustion as well as increase the temperature of the burning process in the gas burning chamber, and then hot gas is escaped through the hot gas duct.
3. 4. The process according to claim 3, wherein hot gas .is escaped through a hot gas duct welded into outer side of the waste-baking chamber to increase the effectiveness of the baking process. An incinerator using heat generated from combustion to bake and sublimate waste to produce gas as for burning waste, the incinerator including: a waste-feeding means on the top of said 25 incinerator for feeding and compacting the waste before sending it into the incinerator; a waste-baking chamber with a gas burning chamber to generate heat used in the baking process; a charcoal-burning chamber is connected to the baking chamber; an ash collecting tray at the bottom of the incinerator; a first air blower connects to a first air duct which is separated into two ducts: one connects to the bottom grate and the other connects to the side grate, in turn, said side grate connects to the funnel collecting waste from the waste-baking chamber; at the bottom edge, H:\HelenF\Keep\speci\P43245.doc 10/9/01 9 there is room for air to circulate and air-feeding holes around it; a second air blower connects to second air duct for feeding secondary air into the gas burning chamber, passing through the main duct connected to the gas sucking duct which sucked the gas and vapor from collecting compartment, an overturned funnel above the side grate; there is an empty space between the gas and vapor collecting compartment and the side grate; as the secondary air is injected into the gas burning chamber, the velocity of the air in the duct will create the venturi principle in the main duct which results in gas and vapor being sucked from the waste baking chamber through the gas collecting duct, a duct welded running 15 along the top of the waste baking chamber, to the gas collecting compartment. The gas and vapor is sucked through the gas sucking duct to the main duct and subsequently injected into the gas burning chamber together with secondary air for combustion.
4. 6. The incinerator according to claim 5, wherein S"said waste-feeding means is a duct in which there is a •go• screw to feed waste.
5. 7. The incinerator according to claim 5, wherein said waste-baking chamber is a cylindrical tank and said gas burning compartment is a vertical duct located at the center of the waste-baking chamber.
6. 8. The incinerator according to claim 6, wherein said waste-baking chamber is a cylindrical tank and said gas burning compartment is a vertical duct located at the center of the waste-baking chamber.
7. 9. The incinerator according to any one of claims to 8, wherein said gas burning chamber is a vertical duct with the bottom end located on the top of the charcoal H:\HelenP\Keep\speci\P43245.doc 10/9/01 10 burning chamber and placed at the center of the waste baking compartment, inside the gas burning chamber, at the bottom there is an orifice plate which is a ring with the outer part welded with the inner part of the duct, thus leaving a smaller hole in the middle to reduce the cut surface of the chamber, this enables the gas and air to mix well which, in turn, leads to a more complete combustion, as well as increases the temperature of the burning process; the burning of gas will continuously take place in the gas burning chamber. The incinerator according to any one of claims to 8, wherein said hot gas duct welded into the outer side of the baking chamber to increase the effectiveness of the 15 baking process.
8. 11. The incinerator according to claim 9, wherein said hot gas duct welded into the outer side of the baking chamber to increase the effectiveness of the baking process.
9. 12. The incinerator according to any one of claims to 11, further comprising a waste-stirring machine which is a screw connected to 4 or more ling axles that run from the top to the bottom of the chamber.
10. 13. The incinerator according to any one of claims to 12, wherein the outer part of the incinerator will be insulated to prevent loss of heat.
11. 14. The incinerator according to any one of claims to 13, wherein said waste-stirring means is a screw connected to four or more long axles that extend from the top to the bottom of the waste-baking chamber. An incineration process using heat generated from combustion to bake and sublimate waste to produce gas H:\HelenF\Keep\speci\P43245.doc 10/9/01 11 substantially as hereinbefore described with reference to the accompanying figures.
12. 16. An incinerator using heat generated from combustion to bake and sublimate waste to produce gas substantially as hereinbefore described with reference to the accompanying figures. Dated this 1 0 t h day of September 2001 MANOP PIYASIL and SOMIT PIYASIL By their Patent Attorneys GRIFFITH HACK Fellows Institute of Patent and Trade Mark Attorneys of Australia H:\He1enF\Keep\speci\P43245.doc 10/9/01