KR20110040600A - Pyrolysis incinerator - Google Patents

Abstract

PURPOSE: An incineration system for pyrolyzing and gasifying waste is provided to prevent the lowering of exhaust efficiency when a rotary shaft is deformed by ashes or heat in an incinerator. CONSTITUTION: An incineration system for pyrolyzing and gasifying waste comprises a first incinerator(20), an ash discharging unit(60), and main and auxiliary air injecting unit(50,70). A burning unit of the first incinerator thermally decomposes wastes and incinerates the wastes. The ash discharging unit is installed on the lower part of the first incinerator. The main air injecting unit is installed in the burning unit of the incinerator. The auxiliary air injecting unit supplies air from the inner wall of the burning unit. The auxiliary air injecting unit partitions the inside of the burning unit into incomplete combustion parts and a complete combustion part according to the combustion degree of the wastes. The auxiliary air injecting unit comprises first and second nozzle units and an air supply unit. The first and second nozzle units independently supply the combustion air to the incomplete combustion parts and the complete combustion part. The air supply unit selectively supplies combustion air to the first and second nozzle units.

Description

Pyrolysis incinerator

The present invention relates to an incineration apparatus, and more particularly, to a re-discharge shaft of a waste pyrolysis gasification incineration apparatus for discharging ash which is a by-product after waste is combusted in an incinerator.

In general, the incineration of household garbage is achieved by the grate firing method. In this method, the combustion air entering the waste pile from below through the grate flows through the waste while the waste is mechanically moved over a horizontal or inclined plane.

Nonflammable debris from the waste is removed from the incineration plant as grate ash or slag. This burn method shows an excellent effect on wastes having a calorific value of 6500 kJ / kg or more, but is not suitable for incineration of wastes having a low calorific value. The reason is that a high level of combustion air preheating is required to dry the waste and a separate fuel is required for this.

Korean Utility Model Registration No. 2000-0017014 discloses a high-temperature pyrolysis incinerator using a water pipe burner, and Utility Model Registration No. 0264806 discloses a pyrolysis incinerator with a closed inlet, and registered patent No. 0303382 for combined combustion. A co-current pyrolysis incinerator is disclosed, and Patent No. 0550311 discloses waste pyrolysis gas, an incineration system, and an incineration method.

Among the disclosed incinerators, waste pyrolysis gas, incineration system, and incineration method include a waste input unit for compressing waste into a certain amount of waste after input, and a double pyrolysis incineration process of waste through drying, pyrolysis, gasification, and combustion. And a first burner of symmetrical inverted triangle shape.

The first combustion section has a storage space inside to store a part of the waste, and the bottom portion is formed into a bisymmetric inverted triangle shape to increase the pyrolysis incineration capacity, and the combustion heat to the waste drying chamber and the center where the drying is performed by the upper heat and the combustion exhaust gas. A first combustion chamber formed at a bottom of the first combustion chamber and a pyrolysis gasification chamber in which pyrolysis gasification occurs, and an air supply nozzle and a direct combustion chamber, respectively, and a re-discharge unit for re-discharging at the lower end of the first combustion chamber And a redistribution outlet formed under the redistribution section.

The ash discharging unit includes a ash discharging shaft and a driver for rotating the redistribution shaft at a predetermined rotational speed. The re-discharge shaft includes a rotating shaft and a drum discontinuously installed to absorb the thermal expansion amount when supported by the rib provided on the circumferential surface of the rotating shaft.

This conventional re-extracting part is damaged by the fine powder, the outer peripheral surface is damaged or the unburned powder is injected into the gap formed between the gap formed to absorb the amount of thermal expansion, the film is solidified or bent of the rotating shaft by the incineration material introduced into the shaft There is a problem. The deformation of the rotary shaft has a problem that the discharge of the ash burned in the incinerator is not smoothly made.

The present invention has been made in view of the above-described problems, and an object thereof is to provide a waste pyrolysis gasification incineration apparatus which can prevent the rotational shaft from being deformed by the combustion material or heat of the incinerator, thereby reducing the ash discharge efficiency.

Another object of the present invention is to provide a waste pyrolysis gasification incineration apparatus that can improve combustion efficiency and reduce combustion ash.

In order to achieve the above object, the waste pyrolysis gasification incineration apparatus according to the present invention is installed in a first incinerator having a combustion section narrowed to the bottom by pyrolysis incineration of waste through gas and combustion process, and is installed in a lower portion of the first incinerator. A re-discharge unit for discharging the combusted ash, a main air injection unit installed in the combustion unit of the incinerator, and auxiliary air injection means for supplying air from the inner wall of the combustion unit,

The auxiliary air injection means divides the inside of the combustion part into incomplete combustion parts and complete combustion parts according to the combustion degree of the waste, and a first nozzle unit for supplying combustion air independently to the incomplete combustion part and the complete combustion part on the inner surface of the combustion part. And second nozzle units, and an air supply unit for selectively supplying combustion air to the first and second nozzle units.

The waste pyrolysis gasification incineration apparatus according to the present invention can prevent the generation of waste that is not burned and discharged by allowing the waste in the first incinerator to be completely burned, thereby increasing the reliability of incineration.

The waste pyrolysis gasification incineration apparatus according to the present invention is capable of fundamentally preventing the unburned ash from being discharged by incomplete combustion of the waste, and an embodiment thereof is illustrated in FIGS. 1 and 2.

Referring to the drawings, the waste pyrolysis gasification incinerator is a waste pyrolysis gasification apparatus 10 by a first incinerator 20 having an input unit into which a predetermined amount of waste is input, and by the first incinerator 20 and the duct. A second incinerator 40 connected to continuously connect the pyrolysis gas generated in the first incinerator 20, and air injection means 50 for injecting air into the first and second incinerators 20 and 40; It is provided in the lower portion of the first incinerator is provided with ash discharge means 60 for discharging ash generated after combustion.

The first incinerator 20 includes a combustion unit 21 which narrows to a lower portion by pyrolysis incineration of the waste through gas and combustion process of the waste. The combustion unit 21 supplies air from the inner wall of the combustion unit 21. Auxiliary air injection means 70 is provided.

As shown in FIGS. 3 to 5, the auxiliary air injection unit 70 partitions the inside of the combustion unit 21 into incomplete combustion units 78 and the complete combustion unit 79 according to the degree of combustion of the waste. First nozzle unit 71 and second nozzle unit 72 for supplying combustion air to the inner surface of the combustion unit independently of the incomplete combustion unit and the complete combustion unit, and the first and second nozzle units 71 ( 72, air supply 75 for selectively supplying combustion air.

The combustion unit 21 has an inclined portion 22 inclined in an inverted triangle, the interior of the inclined portion 22 is made of a fire block 23, each of the incomplete combustion portion as described above First and second nozzle units 71 and 72 provided at the 78 and the complete combustion unit 79 are provided.

As shown in FIG. 4, the first nozzle unit 71 installed in the incomplete combustion unit may include a first inner air channel unit 71a and a first outer air channel unit installed at the outer side of the combustion unit 21. And a first nozzle portion 71c connected to the first outer air channel portion 71b and penetrating through the fire block 23, and connected to a first inner air channel portion 71a. A first through-nozzle portion 71d is formed around the first nozzle portion 71c so as to pass through the firebrick.

The second nozzle unit 72 provided in the incomplete combustion unit has substantially the same configuration as the first nozzle unit. That is, a second inner air channel portion 72a and a second outer air channel portion 72b provided on the outside of the combustion portion 21 are connected to the second outer air channel portion 72b to be fireproof. A second through nozzle portion 72c penetrating the block 23 and a second inner air channel portion 72a and having a firebrick penetrated around the second nozzle 72c. 72d is provided.

The first nozzle unit 71 installed in the incomplete combustion unit 78 and the second nozzle unit 72 installed in the complete combustion unit 79 are independently shown in FIG. 5 so that air can be supplied and injected. The bar and the second inner air channel portion and the second outer air channel portion have a divided structure.

The air supply unit 75 blows the first blower unit 76 that supplies fresh air heated by an electric heater and the combustion exhaust gas circulated from the chimney by mixing the outside air with oxygen concentration to completely burn the air. It is provided with a second air blowing unit 77 to lower the supply.

The first blower unit 76 may include a blower, air supplied from an electric heater (not shown) for heating the air supplied from the blower 76a and the blower, the first supplied air and the first supplied air. And a first blowing duct 76b connected to the two outer air chambers 71b and 72b, and a first valve 76c installed in the first blowing duct 76b for controlling the air supply amount.

The second blower unit 77 supplies a second blower 77a for blowing combustion exhaust gas circulating in the chimney and air blown by the blower to the first and second inner air chambers 71a and 72a. And a second valve duct 77b for supplying, and a second valve 77c installed in the second blower duct 77b for controlling the air supply amount.

The air injection means 50 for injecting air into the first and second incinerators 20 and 40 is

The main blower 51 and the main duct 52 for supplying the air blown from the said blower to the said 1st, 2nd incinerator are provided (refer FIG. 1).

The redistribution means 60 is installed at the outlet side of the combustion section 21 of the first incinerator 20 to discharge the combusted ash. A water cooling jacket is installed into the cylindrical shaft 61 and extends to the bottom. A redistribution opening 62 is formed. At this time, the re-extracting means is an electric driven rotary drum type with a spring suspension is attached to the water cooling jacket in the center of the shaft (Water

Jacket is installed to prevent warpage caused by the temperature of the upper incinerator.

In addition, an incineration ash discharge conveyor 80 is further provided below the redistribution means 60. The incinerator discharge conveyor 80 is immersed in water to extinguish the discharged ash. That is, the upper part is provided with a casing filled with fire, a sprocket installed on the rotating shafts on both sides of the casing, and a chain caught by the sprocket. The chain may be formed of a plate to continuously convey the ash. The chain is made of an RF chain and may be provided with a plate capable of carrying ash. Reference numeral 100 is a burner.

Referring to the operation of the waste pyrolysis gasification incineration apparatus according to the present invention configured as described above are as follows.

In the present invention, the waste is introduced into the hopper, and the injected waste is thermally incinerated in the first incinerator 20. The exhaust gas generated after incineration of the waste is moved to the second incinerator 40. At this time, the exhaust gas generated by injecting air into the second incinerator 40 is completely burned to a high temperature.

In more detail, waste compressed to a predetermined amount (substantially 400 to 500 kg) is introduced into the first incinerator through an input gate of the first incinerator (upper gate not shown), and the input waste is stored in a predetermined amount (first combustion). 4/5 of the part volume, and continuously descends according to the degree of combustion and floor ash discharge from the lower part without a separate driving part.

At this time, the lower part of the first incinerator 20 is formed of the inclined portion 22 having a double symmetrical inverted triangle structure, the first and second nozzles of the auxiliary air injection means for supplying the mixed air of the circulating combustion exhaust gas and the outside air Air is injected at 99 mmH pressure through the portions 71c and 72c, and air is injected at 1.2 mmH pressure through the first and second through-nozzle portions (71d and 72d). The fine powder in the incineration ash is burned by the first and second through nozzles.

The part in contact with the inclined bottom surface of the lower part of the first incinerator is an area where direct combustion is formed according to the supply of mixed air of circulating combustion exhaust gas and external air, and pyrolysis by heat transfer is continuously performed at the upper part of the combustion part. Is dried by the heat generated during the pyrolysis reaction and the injection of circulating combustion exhaust gas.

As described above, the incomplete combustion unit 78 adjacent to the complete combustion unit 89 adjacent to the burner 100 and relatively far from the burner 100 or adjacent to the main duct 52 in the combustion process is first and second. Since the nozzle unit is formed independently, air can be independently supplied through the first and second blower units 76 and 77 of the air supply means 75, thereby preventing incomplete combustion.

In more detail, the waste of the incomplete combustion unit is not sufficiently supplied with air to prevent combustion and pyrolysis, and the air supply amount and the combustion exhaust gas supply amount are changed through the first nozzle unit 72 installed in the incomplete combustion unit. By adjusting, fundamental combustion can be prevented.

By preventing combustion as described above, it is possible to fundamentally prevent the incineration of incompletely burned incineration ash from the incineration ash discharge conveyor through the redistribution means, and further reduce the amount of incineration ash discharged after incineration. Compared to other incinerators, the residues are higher than ˜94%, so the landfill life can be extended.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

The present invention is widely applicable to various types of incinerators as well as waste pyrolysis gasification incinerators.

1 is a side view showing a waste pyrolysis gasification incineration apparatus according to the present invention,

2 is a plan view showing a combustion part of the first incinerator;

3 is a sectional view showing a combustion part of the first incinerator;

4 is a cross-sectional view showing an extract of the nozzle unit installed in the combustion unit;

5 is a partial ablation perspective view showing an extract of the auxiliary air injection means of the combustion unit.

Claims (3)

 A first incinerator having a combustion section gradually narrowed to the bottom by pyrolysis incineration of the waste through gas and a combustion process, redistribution means installed in the lower portion of the first incinerator, and for discharging the combusted ash; A main air injection unit installed in the unit and auxiliary air injection means for supplying air from the inner wall of the combustion unit, The auxiliary air injecting means comprises: first nozzle parts for dividing the inside of the combustion part into incomplete combustion parts and complete combustion parts according to the combustion degree of waste, and independently supplying combustion air to the incomplete combustion part and the complete combustion part on an inner surface of the combustion part; And a second nozzle part and a supply part for selectively supplying combustion air to the first and second nozzle parts.  The method of claim 1, The first nozzle unit includes a first inner air channel portion and a first outer air channel portion installed outside the combustion unit 21 and is connected to the first outer air channel portion to penetrate the fire block. And a first through nozzle portion connected to the nozzle portion and the first inner air channel portion, the fire brick being penetrated around the first nozzle portion.  The method of claim 1, The air supply unit blows the first blower unit supplying the outside air heated by the electric heater and the combustion flue gas circulated from the chimney so as to completely burn the air, and mixes the outside air to lower the oxygen concentration to supply the second blower unit. Waste pyrolysis gasification incineration apparatus, characterized in that provided with.

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