DE1962650A1 - Waste incineration plant - Google Patents

Description

Description of the patent application

of Combustion Engineering. Inc «. Windsor. Connecticut. UNITED STATES.

concerning:

"Garbage Incineration Plant"

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The invention relates to a waste incineration plant with an inlet in the furnace chamber through which at least one partially encapsulated arranged Kandfördereinrichtung or the like. Refuse or waste conveyed into the furnace of the Oven can be inserted

The use of preheated combustion air for Achieving a more stable combustion process and increased combustion efficiency has long been known This is particularly the case with coal and oil-fired steam generators in electric power plants. warmed air is used in incinerators for incineration used to a lesser extent by garbage or trash, often with a high moisture content. Because of the high cost a heat exchanger for air preheating, it has hitherto hardly been economically justifiable to have such a

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To provide heat exchangers in a waste incineration plant, the main purpose of which is the removal of cladding and waste and does not consist in the production of steam. Nevertheless, it is of course also desirable for waste incineration plants that Incineration of the often moist garbage and refuse by pre-drying and by supplying preheated combustion air to improve·

The invention is based on the object of a simple To create trained, reliable and inexpensive to manufacture device, with which it is possible for the To preheat the combustion air required for waste incineration and, with this preheated air, also the conveyed air To pre-dry garbage

Such a waste incineration plant is characterized according to the invention by a double-walled design of the Oven with two oven walls arranged at a distance from one another, the space between them via an air inlet with the ambient air and via an outlet with the housing of the conveyor device is connected, which is connected with its outlet to the furnace. Xn such a double-walled incinerator the air required for combustion is first passed between the two furnace walls and heated in the process, then serves to pre-dry the refuse and waste supplied to the incinerator and is then passed under the grate into the furnace chamber as under-wind combustion air · Through the double-walled Training the furnace is not just about the combustion air preheated, but the furnace walls are also cooled, causing chipping and cracking of the refractory linings prevents

Further details and advantages of the subject matter of the invention emerge from the following description

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• Ines preferred embodiment shown in the drawing · Show in the drawing

Fig. 1 is a sectional view through an inventive trained waste incineration plant and

Fig. 2 is a plan view of this system.

The waste to be incinerated is placed in the waste incineration furnace IO Garbage and rubbish introduced through an opening 12. The at Ash resulting from the combustion falls from the rear end of a grating 14 into the ash vent 15. The hot combustion gases rise in the furnace, flow around a baffle 16 and pass through the furnace outlet 18 into one Flue gas duct 22 · The gases then flow through a wet cleaner 20 where ash and other solids are separated and removed before they exit into the atmosphere through chimney 24

The waste incineration furnace 10 is double-walled with a refractory lined inner furnace wall 28 and an outer metal jacket 30. Atmospheric air passes through a covered inlet 34 located at the top of the furnace into that between the furnace walls existing space 32 a. The air flows downward through the space 32 until it reaches the lower part of the System where it is collected in a manifold 36. The heated air flows from the manifold 36 through a line 38 into the housing 40 of a Batfof conveyor 42. The hot air flows around the garbage and waste lying on the conveyor 42 and enters the loading bucket 46 of the An extractor hood or jacket 44 surrounding the furnace · The garbage and debris on the conveyor belt has some effect like a seal that prevents the hot air from exiting the left end of the housing 40.

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The air leaves the exhaust hood 44 through a line 48, flows through the wind blower 50 and passes through a line 56 into the area 52 below the grating The air then flows upwards through openings in the grating, to support the waste incineration on the grating 14 as underfiring air

The operation of the waste incineration plant is described below. Garbage and garbage to be disposed of will be on the conveyor belt 42 brought the conveyor belt is put into operation periodically to fill the loading bucket 46 At certain intervals, the bucket 46 dumps a load of garbage onto the grate 14. The garbage and garbage is placed on the grate burned and moved continuously along the grating by an oscillating or vibrating swinging movement, until the ash falls from the rear end of the grate into the ash outlet 15.

Combustion air enters the space between the furnace walls and absorbs heat from the inner furnace wall as it flows downwards through the gap. The heated one Air then flows through the jacketed or encapsulated conveyor 42 where excessively moist garbage and trash is dried will «The air is then put in the incinerator routed under the grating to serve as combustion air

From the above it follows that with the invention an economical and with a good efficiency working waste incineration plant has been created that not only uses preheated air for incineration of the garbage and garbage works but is also characterized by the fact that the garbage and garbage for the purpose of removal is pre-dried by excess moisture. the

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preheated air is produced without an expensive separate component, like an air preheater, creates · The double-walled construction The incinerator does a double job · You serves not only to heat the air used to pre-dry the garbage and waste and to deliver heated air Combustion air for the furnace, but rather through the atmospheric air entering the space between the furnace walls Air also becomes the inner refractory wall of the incinerator chilled. Without this cooling effect, such a refractory furnace wall is much more prone to chipping and cracking or cracking of the wall material due to overheating

- patent claims -

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Claims (3)

Claims I 1.) Waste incineration plant with an inlet in the furnace chamber, by the at least partially encapsulated arranged belt conveyor device or the like · conveyed garbage or waste is introduced into the combustion chamber of the furnace, characterized by a double-walled design of the furnace (10) with two furnace walls (28, 30) arranged at a distance from one another, the space between them (32) via an air inlet (34) with the ambient air and via an outlet (36,38) with the Housing (40) of the conveying device is connected, which is connected with its outlet (44) to the furnace (10) 2. Waste incineration plant according to claim 1, characterized by forcing the air to move by means of a fan (50) or the like from the air inlet (34) through the double-walled furnace wall (28,30), along the conveyor (42) and into the furnace chamber. 3. Waste incineration plant according to claims 1 and with a grating for the garbage or waste to be incinerated, characterized in that the outlet (44) of the housing (40) enclosing part of the conveying device (42) Via a Uhterwind blower (50) or the like. With an air line opening into the furnace space below the grating (14) (56) is connected. / 0 09828/1172