KR20010103211A - Incineration installation - Google Patents

Abstract

The present invention relates to an incineration apparatus that can increase the efficiency of fuel and the velocity of combustion gas discharged from an incineration chamber by absorbing heat of the gas discharged from the second combustion chamber and injecting the fuel into the second combustion chamber at high speed. High-temperature gas generated during the secondary combustion of the gas, which heats the air flowing in the heat exchange means, and supplies the heated air to the second combustion chamber by using the air injection means to heat the inside of the second combustion chamber with low fuel consumption. It can be kept in a state. The hot air is injected toward the outlet of the combustion gas, that is, in the same direction as the flow direction of the exhaust gas, thereby increasing the velocity of the exhaust gas from the incineration chamber discharged to the second combustion chamber to improve the incineration efficiency of the incineration chamber.

Description

Incineration equipment

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incineration apparatus, and more particularly, to an incineration apparatus capable of improving thermal efficiency and increasing combustion gas discharge rate in an incineration chamber by using heat generated during secondary combustion of exhaust gas.

Incinerators that incinerate waste, such as waste incinerators, carry out incineration processes for waste incineration and secondary combustion processes for burning incomplete combustion gases and gases containing toxic components (for example, dioxins) from waste incineration. . Referring to the configuration of the incineration apparatus for performing this process in detail as follows.

1 is a view showing the configuration of a general incineration apparatus, the incineration apparatus 10 is located in the incineration chamber 11, the incineration chamber 11 in which waste incineration is made, and discharged from the incineration chamber 11 during incineration of waste. Discharge from the dust collecting device 13 and the dust collecting device 13 for collecting dust contained in the gas discharged in connection with the second combustion chamber 12, the second combustion chamber 12 for secondary combustion of the harmful gas and incomplete gas And a shower tunnel 14 for removing harmful components (eg, nitrogen oxides (NO _X ) and sulfur oxides (SO _X ), etc.) contained in the gas to be produced.

A first burner 11A is installed in the incineration chamber 11 into which waste is injected, and a blower 11B (blower) for supplying air into the incineration chamber 11 is located at one side of the incineration chamber 11. do. When waste is introduced into the incineration chamber 11, air is supplied by the blower 11B, and the waste is incinerated in accordance with the operation of the first burner 11A.

Combustion gas generated during the incineration process flows into the second combustion chamber 12 through the connection portion C1. The second burner 12A is installed at one side of the second combustion chamber 12, and thus, the combustion gas introduced into the second combustion chamber 12 in accordance with the operation of the second burner 12A, in particular, is contained in the combustion gas described above. The toxic components and the incomplete fuel gas of the fuel are completely burned in this process. On the other hand, the blower 11B which supplies air in the incineration chamber 11 supplies air also in the 2nd combustion chamber 12. As shown in FIG.

Combustion gas discharged after combustion in the second combustion chamber 12 flows into the dust collector 13 connected to the second combustion chamber 12, and the dust collector 13 removes dust contained in the combustion gas. Done. The dust-free combustion gas flows into the shower tunnel 14 connected with the dust collector 13. The shower tunnel 14 has a structure in which water is sprayed into the shower tunnel 14 to remove nitrogen oxides, sulfur oxides, and the like contained in the exhaust gas. The harmful components contained in the exhaust gas are dissolved by the water sprayed, and the water in which the harmful components are dissolved is purified. Exhaust gas from which noxious components are removed in the shower tunnel 14 is forcibly discharged to the outside by the air supplied by the blower 15.

In such an incineration apparatus, as described above, the combustion gas generated during the incineration of waste in the incineration chamber 11 contains a large amount of harmful components such as unstable combustion gas and dioxin, and the second combustion chamber ( 12) maintains a high temperature state of about 800 ℃ to 1,000 ℃. Although the temperature of the combustion gas discharged from the incineration chamber 11 is high, a large-capacity burner 12A must be used to maintain the temperature condition inside the second combustion chamber 12 where noxious components are incinerated. Large amounts of fuel are consumed for secondary combustion.

On the other hand, the high pressure and high speed air by the blower 11B is supplied into the 2nd combustion chamber 12 through the air injection apparatus (not shown) attached to the fireproof wall 12B of the 2nd combustion chamber 12. As shown in FIG. However, the injection direction (arrow A) of the air supplied into the 2nd combustion chamber 12 becomes substantially orthogonal to the flow direction (arrow B) of the combustion gas discharged | emitted to the dust collector 13 after secondary combustion is made. Therefore, the air supplied into the second combustion chamber 12 disturbs the flow of the combustion gas so that the gas discharge from the second combustion chamber 12 is not smoothly performed.

This phenomenon consequently prevents combustion gas discharge in the incineration chamber 11 and causes congestion of the combustion gas in the incineration chamber 11, thus increasing the ratio of the combustion gas in the incineration chamber 11 to the incineration chamber 11. This will significantly reduce the incineration efficiency of).

The present invention provides an incineration apparatus that can solve the above-described problems occurring in an incineration apparatus, that is, excessive use of energy during secondary combustion of combustion gas generated in an incineration chamber and a decrease in incineration efficiency due to stagnant combustion gas. The purpose is.

The present invention heats the air by contacting the flowing air with a high temperature combustion gas generated during the second combustion of the combustion gas, and by supplying the heated air to the second combustion chamber, the inside of the second combustion chamber at high temperature with low fuel consumption Can be maintained.

In addition, by injecting the high-temperature air toward the discharge port of the combustion gas, by increasing the speed of the exhaust gas from the incineration chamber discharged to the second combustion chamber, the combustion gas in the incineration chamber can be suppressed to improve the incineration efficiency.

In order to achieve the above object, the present invention provides an incineration chamber in which waste is incinerated, a second combustion chamber positioned above the incineration chamber for secondary combustion of the gas discharged from the incineration chamber, and a dust collector and a dust collector connected to the second combustion chamber. Applied to an incineration device including a shower tunnel to remove harmful components contained in the exhaust gas, the inside of the hot gas flows from the outside of the second combustion chamber is installed in the discharge end of the second combustion chamber flows from the outside of the second combustion chamber Heat exchange means for absorbing heat; And air injecting means located at the tip of the burner installed in the second combustion chamber and connected to the heat exchange means to inject the hot air supplied from the heat exchange means into the second combustion chamber.

The heat exchange means used in the present invention is a pipe wound in a coil type, which is made of a metal having excellent heat resistance and thermal conductivity, and one end is connected to the air supply means. In addition, the air injection means is a ring-type pipe, and a plurality of injection holes for injecting air therein into the second combustion chamber are formed on the front surface of the pipe.

The air injected from the ring-shaped pipe is injected in the same direction as the flow direction of the exhaust gas to further increase the speed of the combustion gas discharged from the incineration chamber, which prevents stagnation of the combustion gas in the incineration chamber, thereby incinerating waste in the incineration chamber. The efficiency can be improved.

Hereinafter, with reference to the accompanying drawings of the present invention will be described in detail.

1 is a cross-sectional view showing the overall configuration of an incinerator.

2 is a cross-sectional view showing the overall configuration of an incinerator according to the present invention.

3 is a detailed cross-sectional view showing only the second combustion chamber.

4 is a front view of the air injection means as viewed in the direction C of FIG.

2 is a cross-sectional view showing the overall configuration of the incineration apparatus according to the present invention, Figure 3 is a detailed view showing only the second combustion chamber. The incineration apparatus according to the invention is similar to the general incineration apparatus shown in FIG. 1. That is, the incineration apparatus of the present invention is also located in the incineration chamber 11, the incineration chamber 11 in which waste incineration proceeds, the second combustion chamber 20 for secondary combustion of the gas discharged from the incineration chamber 11, A dust collecting device 13 connected to the second combustion chamber 20 and a shower tunnel 14 for removing harmful components contained in the gas discharged from the dust collecting device 13 are included. In FIG. 2, the same reference numerals are given to the same members as those shown in FIG.

The biggest feature of the present invention is the heat exchange means 30 for heating the air and the air injection means 40 for injecting the heated air in the second combustion chamber 20 in connection with the heat exchange means 30 It is provided in the 2nd combustion chamber 20 inside.

The heat exchange means 30 used in the present invention is a pipe wound in the form of a coil, and the pipe 30 is made of a metal having excellent heat resistance and thermal conductivity. The coiled pipe 30 is fixed to the outlet of the second combustion chamber 20. The first end 31 of the coiled pipe 30 is connected to an air supply means 11B (blower) installed outside the second combustion chamber 20, and the second end 32 is an air injection means 40. )

The air injection means 40 is located at the tip of the second burner 20A which burns the combustion gas inside the second combustion chamber 20. The air injection means 40 used in the present invention is a ring-type pipe, and is made of a metal having excellent heat resistance similarly to the coiled pipe 30 of the heat exchange means. A plurality of injection holes 41 are formed on the front surface of the ring-shaped pipe 40, that is, the surface facing the second combustion chamber 20, and on one side of the second pipe 32 of the coiled pipe 30. ) Is connected.

Unexplained reference numerals W1 and W2 in FIGS. 1 and 2 are water jackets and are members for cooling the outer wall of the incineration chamber 11 and the dust collector 13.

The function of the present invention as described above will be described with reference to the drawings.

The combustion gas generated during the waste incineration process in the incineration chamber 11 flows into the second combustion chamber 20 through the connection portion C1. At the same time, the air flows into the ring-shaped pipe 40 through the coiled pipe 30 by the blower 11B (which is already operated according to the operation of the burner 11A of the incineration chamber), and the ring-shaped pipe 40 ) Is injected through a plurality of injection holes 41 formed on the front surface.

As the second burner 20A is operated to raise the temperature inside the second combustion chamber 20, the coiled pipe 30 installed at the outlet of the second combustion chamber 20 is in direct contact with a high temperature combustion gas. Therefore, the air flowing therein also absorbs the heat from the outside and the temperature is increased. The winding of the pipe 30 in the form of a coil as shown in FIGS. 2 and 3 is to maximize the flow path of the air to maximize the heat absorption of the air flowing therein.

The air whose temperature is raised in the course of passing through the inside of the coiled pipe 30 is introduced into the ring-shaped pipe 40, so that the hot air is injected into the second combustion chamber through the injection holes 41 formed in front of the ring-shaped pipe 40. High speed injection is carried out at 20. By injecting and supplying hot air into the second combustion chamber 20 separately from the second burner 20A, the internal temperature of the second combustion chamber 20 is reduced to an optimum temperature (about 800 ° C to 1,000 ° C) in a shorter time. Can be reached.

Thereafter, the harmful components and the incomplete combustion gas contained in the combustion gas introduced into the second combustion chamber 20 are completely combusted. When the temperature inside the second combustion chamber 20 is maintained at 800 ° C to 1,000 ° C, the temperature of the air passing through the inside of the coiled pipe 30 is further increased, and eventually, higher temperature air is passed through the ring-shaped pipe 40. Even if the output of the second burner 20A is reduced by being injected, the inside of the second combustion chamber 20 can maintain a temperature of 800 ° C to 1,000 ° C. As a result, the combustion efficiency of the second burner 20A can be improved due to the hot air injected through the ring-shaped pipe 40.

Meanwhile, as shown in FIG. 3, the ring-shaped pipe 40 is ring-shaped by being located directly at the tip of the second burner 20A, that is, directly above the connecting portion C1 connecting the incineration chamber 11 and the second combustion chamber 20. When hot air is injected at high speed in the pipe 40, the pressure near the connection C1 is increased (Bernoulli's theorem). Therefore, the combustion gas suction speed into the second combustion chamber 20, that is, the speed of the combustion gas discharged from the incineration chamber 11 is increased. In addition, since the injection direction of the air is the same as the discharge direction of the combustion gas, the speed of the combustion gas discharged from the incineration chamber 11 is further increased.

The present invention as described above absorbs the heat of the combustion gas discharged from the second combustion chamber and supplies it back to the second combustion chamber, so that the internal temperature of the second combustion chamber can be maintained at the set temperature even if the output of the burner is reduced, thereby improving fuel efficiency. Improvements can be made.

Further, by injecting hot air at high speed, the combustion gas suction speed (ie, the velocity of the combustion gas discharged from the incineration chamber) to the second combustion chamber is increased, and the injection direction of the air is the same as the discharge direction of the combustion gas. In this case, the speed of the combustion gas discharged from the incineration chamber is further increased. As a result, it is possible to prevent the stagnation of combustion gases in the incineration chamber, thereby improving the efficiency of waste incineration in the incineration chamber.

Claims (3)

Incineration chamber where waste is incinerated, Second combustion chamber located in the upper part of the incineration chamber for secondary combustion of gas discharged from the incineration chamber, dust collector connected to the second combustion chamber, and harmful components contained in the gas discharged from the dust collector In the incineration device comprising a shower tunnel for removing the, Heat exchange means inside which air supplied from the outside flows and which is mounted at the discharge end of the second combustion chamber to absorb heat of the hot gas discharged from the second combustion chamber; And And an air injection means positioned at the tip of the burner installed in the second combustion chamber and connected to the heat exchange means to inject hot air supplied from the heat exchange means into the second combustion chamber. 2. The incineration of claim 1, wherein the heat exchange means is a pipe wound in a coil type, the pipe being made of a metal having excellent heat resistance and thermal conductivity, and one end of which is connected to the air supply means. Device. The air injector of claim 1, wherein the air injecting means is a ring-type pipe, and a plurality of injectors are provided on a front surface of the pipe for injecting hot air supplied from the heat exchange means in the same direction as the flow direction of the exhaust gas. An incineration apparatus, characterized in that is formed.