KR102651163B1 - Combustion chamber air and oxygen injection device that induces complete combustion - Google Patents

Abstract

The present invention relates to an air and oxygen injection unit in a combustion chamber that induces complete combustion, and more specifically, to inject air into the ash and combustion gas generated by burning biomass fuel to cause secondary combustion, and then to produce secondary combustion by the oxygen injection unit. This relates to an air and oxygen injection unit in the combustion chamber that induces complete combustion with low pollution by additionally spraying oxygen for combustion.
The air and oxygen supply device according to an embodiment of the present invention is assembled into a lower combustion chamber in which solid biomass fuel is input and combustion occurs, and is assembled to the upper part of the lower combustion chamber, and combustion occurs by combustion of the solid biomass fuel. The combustion chamber includes an upper combustion chamber that burns gas, and a roaster unit installed on the inner upper side of the lower combustion chamber, in which solid biomass fuel is seated, and rotating the solid biomass fuel in the circumferential direction by the operation of a conveyor belt. It relates to an installed air and oxygen supply device, which is installed at the bottom of the roaster unit and injects air into the solid biomass fuel seated at the top, and the lower combustion chamber into which the solid biomass fuel is placed and seated. A plurality of air supply channels are arranged side by side from one side to the other side and receive air for spraying air into the solid biomass fuel, and the plurality of air supply channels are inclined and extend toward one upper side and the other side, respectively. and is arranged side by side along the lower circumference of the upper combustion chamber and an air injection unit including a plurality of air injection nozzles intersectingly arranged, and injects oxygen into the combustion gas generated by combustion of the solid biomass fuel, and the lower combustion chamber Oxygen injection including a front oxygen injection line that injects oxygen in the direction in which the combustion gas generated when solid biomass fuel is burned on one side of the device expands, and a side oxygen injection line that extends along the longitudinal direction of both sides of the lower combustion chamber. May include wealth.

Description

Combustion chamber air and oxygen injection device that induces complete combustion}

The present invention relates to an air and oxygen injection unit in a combustion chamber that induces complete combustion, and more specifically, to inject air into the ash and combustion gas generated by burning biomass fuel to cause secondary combustion, and then to produce secondary combustion by the oxygen injection unit. This relates to an air and oxygen injection unit in the combustion chamber that induces complete combustion with low pollution by additionally spraying oxygen for combustion.

Unless otherwise indicated herein, the material described in this section is not prior art to the claims of this application, and is not admitted to be prior art by inclusion in this section.

Recently, as climate change due to global warming has emerged as a serious threat to human survival, interest in new and renewable energy is increasing, and investment to replace existing fossil fuels is rapidly increasing. In this regard, research is being actively conducted on combustion furnaces using biomass solid fuel, which are different from combustion furnaces using existing coal. Normally, biomass solid fuel is renewable energy extracted from waste such as energy-dedicated crops and trees, agricultural products and feed crops, farm waste and waste, etc. Biomass is plant matter produced through photosynthesis of plants and microorganisms using solar energy. , a term that refers to biological organisms including fungi and the animals that feed on them. Therefore, biomass resources include starch-based resources such as grains, cellulose-based resources including forest trees such as wood chips and waste wood, and agricultural products such as rice straw and rice husk, sugar-based resources such as sugarcane and sugar beets, and food waste. It has a comprehensive meaning including organic waste.

Methods for converting biomass into energy can be divided into thermochemical methods and biological methods. Among them, the oldest energy conversion technology among thermochemical methods is incineration. In the biomass energy recovery process through incineration, the process configuration and design conditions of unit facilities are determined according to the nature of the incoming material and the downstream air pollutant emission concentration standards, and the incineration method generally depends on the type of incinerator, using a fire grate. ) and fluidized bed incineration devices. Grate incineration devices are classified into fixed grates and mobile grates, depending on the type of grate.

In the case of the above-mentioned boiler or combustion furnace using biomass, there is a disadvantage in that combustion efficiency is low due to the characteristics of solid fuel and this increases CO due to incomplete combustion, and clinker may be generated due to a local increase in combustion temperature in the grate. There is a problem that the generation rate of nitrogen oxides is higher than that of other fuels.

1. Korean Patent Registration No. 10-2276526 (announced on July 14, 2021)

The present invention applies air and oxygen injection in the combustion chamber to induce complete combustion with low pollution by injecting air into the ash and combustion gas generated by burning biomass fuel to cause secondary combustion, and then additionally injecting oxygen through an oxygen injection unit for combustion. We would like to provide a device.

In addition, it is not limited to the technical challenges described above, and it is obvious that other technical challenges may be derived from the description below.

The air and oxygen supply device according to an embodiment of the present invention is assembled into a lower combustion chamber in which solid biomass fuel is input and combustion occurs, and is assembled to the upper part of the lower combustion chamber, and combustion occurs by combustion of the solid biomass fuel. The combustion chamber includes an upper combustion chamber that burns gas, and a roaster unit installed on the inner upper side of the lower combustion chamber, in which solid biomass fuel is seated, and rotating the solid biomass fuel in the circumferential direction by the operation of a conveyor belt. It relates to an installed air and oxygen supply device, which is installed at the bottom of the roaster unit and injects air into the solid biomass fuel seated at the top, and the lower combustion chamber into which the solid biomass fuel is placed and seated. A plurality of air supply channels are arranged side by side from one side to the other side and receive air for spraying air into the solid biomass fuel, and the plurality of air supply channels are inclined and extend toward one upper side and the other side, respectively. and is arranged side by side along the lower circumference of the upper combustion chamber and an air injection unit including a plurality of air injection nozzles intersectingly arranged, and injects oxygen into the combustion gas generated by combustion of the solid biomass fuel, and the lower combustion chamber Oxygen injection including a front oxygen injection line that injects oxygen in the direction in which the combustion gas generated when solid biomass fuel is burned on one side of the device expands, and a side oxygen injection line that extends along the longitudinal direction of both sides of the lower combustion chamber. May include wealth.

According to a preferred feature of the present invention, the front oxygen injection line receives oxygen from a first oxygen supply line extending downward from one upper side of the upper combustion chamber and sprays it toward the inside of the upper combustion chamber, and the side oxygen injection The line receives oxygen from a second oxygen supply line extending along the longitudinal direction on both sides of the lower part of the upper combustion chamber and injects it toward the inside of the upper combustion chamber, and a first side oxygen injection line formed adjacent to the upper part of the lower combustion chamber. and a second side oxygen injection line disposed side by side at the top of the first side oxygen injection line.

According to a preferred feature of the present invention, the plurality of air supply channels are characterized in that the installation density of the air injection nozzles decreases from one side to the other side of the lower combustion chamber.

According to a preferred feature of the present invention, the side oxygen injection line is characterized in that the installation density decreases from one side of the lower combustion chamber to the other side to correspond to the installation density of the air injection nozzles installed in the plurality of air supply channels. do.

The air supply channels are arranged side by side along the longitudinal direction from one side of the lower combustion chamber, and a plurality of first air supply channels in which a plurality of air injection nozzles are formed at high density are installed at a predetermined interval. An area and a second air supply channel area in which a plurality of second air supply channels formed at a lower density than the air injection nozzles installed in the first air supply channel are installed at a predetermined interval, wherein the plurality of first air supply channels are installed. The supply channels are characterized in that their distance from each other gradually increases as they move from one side of the lower combustion chamber to the other side.

According to a preferred feature of the present invention, it further includes an oxygen injection control unit that controls the amount of oxygen injected from the side oxygen injection line of the oxygen injection unit to be differently injected along the longitudinal direction of the lower combustion chamber, and the oxygen injection control unit, When the incomplete combustion gas generated by combustion of the solid biomass fuel passes through the first air supply channel area and passes through the second air supply channel area, the second air supply channel area is installed in the corresponding area of the area where the second air supply channel area is installed. By increasing the amount of oxygen injection through the oxygen injection nozzle of the side oxygen injection line to combust the combustion gas, the incomplete combustion gas is blocked from spreading to the other end of the lower combustion chamber.

According to a preferred feature of the present invention, the plurality of air injection nozzles formed in the air supply channel include a plurality of first air injection nozzles inclined upward toward one side of the lower combustion chamber, and an upper portion toward the other side of the lower combustion chamber. It includes a plurality of second air injection nozzles that are inclined and arranged to intersect with the first air injection nozzles, wherein the air supply channel installed from the starting point of the second air supply channel area to the other side of the lower combustion chamber includes the plurality of second air injection nozzles. It is characterized in that a third air injection nozzle is formed between the two air injection nozzles at a position corresponding to the position where the first air injection nozzle is installed.

According to a preferred feature of the present invention, it further includes an air injection control unit that controls the amount of air sprayed from the air injection unit to be sprayed differently along the longitudinal direction of the lower combustion chamber, and the air injection control unit controls the combustion gas When passing through the first air supply channel area and the second air supply channel area, air is blown through the third air injection nozzle among the air injection nozzles of the air supply channel installed in the area corresponding to the area where the second air supply channel area is installed. It is characterized by burning combustion gas by increasing the injection amount.

According to the present invention, there is an advantage that it is possible to burn with high efficiency and low pollution using solid biomass fuel.

In addition, the ash and combustion gas generated by burning solid biomass fuel are subjected to secondary combustion using an air and oxygen supply device, and oxygen is injected to cause tertiary combustion, thereby inducing complete combustion and minimizing harmful exhaust gas emissions. there is.

The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a view of the interior from the front of a combustion chamber including an air and oxygen injection device according to an embodiment of the present invention.
Figure 2 is a side cross-sectional view of a combustion chamber including an air and oxygen injection device according to an embodiment of the present invention.
Figure 3 is a view of the interior from the top of a combustion chamber including an air and oxygen injection device according to an embodiment of the present invention.
Figure 4 is a side cross-sectional view and a front cross-sectional view showing a portion of the lower combustion chamber and the side oxygen injection line in the air and oxygen injection device according to an embodiment of the present invention.
Figure 5 is a detailed view of an air injection unit in a combustion chamber including an air and oxygen injection device according to an embodiment of the present invention.
Figure 6 is a detailed view of an air supply channel and an air injection nozzle in a combustion chamber including an air and oxygen injection device according to an embodiment of the present invention.
Figure 7 is a detailed view of a rostol in a combustion chamber including an air and oxygen injection device according to an embodiment of the present invention.

Hereinafter, the structure, operation, and effects of the invention according to preferred embodiments will be examined with reference to the attached drawings. For reference, in the drawings below, each component is omitted or schematically shown for convenience and clarity, and the size of each component does not reflect the actual size. In addition, the same reference numerals refer to the same components throughout the specification, and reference numerals for the same components in individual drawings will be omitted.

The combustion chamber according to an embodiment of the present invention is assembled into a lower combustion chamber 10 in which solid biomass fuel is input and combustion occurs, and an upper part of the lower combustion chamber 10 is assembled and the solid biomass fuel is burned. The upper combustion chamber 20, which burns the generated combustion gas, is installed on the upper side of the lower combustion chamber 10, and the solid biomass fuel is seated, and the solid biomass fuel is distributed around the circumference by the operation of the conveyor belt 31. It relates to an air and oxygen supply device installed in a combustion chamber including a rotor part 30 that rotates in one direction, which is installed at the lower part of the rotor part 30 and injects air into the solid biomass fuel seated at the top. A plurality of air supply channels are arranged side by side from one side of the lower combustion chamber 10 into which the solid biomass fuel is inserted and seated, and receive air for spraying air into the solid biomass fuel. (41) and an air injection unit (40) including a plurality of air injection nozzles (43) that are inclined and extended from the plurality of air supply channels (41) toward one upper side and the other side, respectively, and are intersecting. It is arranged side by side along the lower circumference of the combustion chamber 20, and injects oxygen into the combustion gas generated by combustion of the solid biomass fuel, and combustion occurs as the solid biomass fuel is burned on one side of the lower combustion chamber 10. The oxygen injection unit 50 includes a front oxygen injection line 51 that injects oxygen in the direction in which the gas expands, and a side oxygen injection line 53 extending along the longitudinal direction of both sides of the lower combustion chamber 10. ) may include.

The lower combustion chamber 10 may have a hexahedral shape with a predetermined space formed inside and an open top, and solid biomass fuel is seated in the roaster unit 30 installed at the upper part of the lower combustion chamber 10. It is transported along the longitudinal direction by the operation of the conveyor belt 31.

At the top of the lower combustion chamber 10, an upper combustion chamber 20 having a shape that is open on all sides and closed on all sides to correspond to the shape of the lower combustion chamber 10 is formed so that it can be assembled in an assembly manner. At the bottom of the lower combustion chamber 10, there may be a separate configuration for storing and discharging ash generated from combustion of biomass fuel.

The upper combustion chamber 20 may be equipped with an input portion into which solid biomass fuel can be input, and has a dome shape with a predetermined width and height in order to easily accommodate the combustion gas generated when solid biomass fuel is burned. Alternatively, it is preferably made in the form of a square frame.

In addition, the outer peripheral surface formed along the open lower circumference of the upper combustion chamber 20 and the outer peripheral surface formed along the open upper circumference of the lower combustion chamber 20 are assembled and coupled to each other.

In the above assembly method, each combustion chamber can be welded and joined together, but it is not limited to this and can be any method as long as it is assembled in a completely sealed manner to prevent combustion gases from being discharged through minute gaps, such as block coupling or bonding by adhesive method. possible.

As the solid biomass fuel seated in the roaster part 30 of the lower combustion chamber 10 undergoes primary combustion, ash and combustion gas are generated, and the ash and combustion gas are generated in the lower combustion chamber 20, more precisely, in the combustion chamber 20. Secondary combustion is carried out by the air injection unit 40, which is installed at the lower part of the tall part 30 and sprays air, thereby minimizing the harmful substances generated from the ash and reducing the proportion of harmful gases contained in the combustion gas.

Nevertheless, in the lower combustion chamber 10, all combustion gases are not completely burned and incomplete combustion gases may be generated and spread. In order to achieve tertiary combustion that induces complete combustion by additionally supplying oxygen to these combustion gases, An oxygen injection unit 50 that sprays oxygen may be formed along the lower circumference of the upper combustion chamber 20.

According to a preferred feature of the present invention, the front oxygen injection line 51 receives oxygen from the first oxygen supply line 51a extending downward from one upper side of the upper combustion chamber 20, and receives oxygen from the upper combustion chamber (20). 20) It is sprayed toward the inside, and the side oxygen injection line 53 receives oxygen from the second oxygen supply line 53a extending along the longitudinal direction on both sides of the lower part of the upper combustion chamber 20 and supplies oxygen to the upper combustion chamber 20. (20) The injection is directed toward the inside, and the first side oxygen injection line 531 formed adjacent to the upper part of the lower combustion chamber 10 and the second side oxygen injection line 531 arranged side by side at the top of the first side oxygen injection line 531 It is characterized by consisting of a side oxygen injection line (533).

The oxygen injection unit 50 formed in the upper combustion chamber 20 is largely configured to generate tertiary combustion by combustion gas by spraying oxygen inward from the front and both sides.

First, the front oxygen injection line 51 receives oxygen from the first oxygen supply line 51a extending downward from one upper side of the upper combustion chamber 20, and supplies oxygen to the inside of the upper combustion chamber 20, more precisely, to the solid state. As biomass fuel is burned, it is sprayed toward the point where the most combustion gases are generated.

In addition, the side oxygen injection lines 53 are arranged along the longitudinal direction of the upper combustion chamber 20 on both sides with respect to the front oxygen injection line 51, and are arranged in the longitudinal direction on both sides of the lower part of the upper combustion chamber 20. Oxygen is supplied from the second oxygen supply line (53a) extending along and sprayed into the upper combustion chamber (20).

Here, the side oxygen injection line 53 is a first side oxygen injection line 531 formed adjacent to the upper part of the lower combustion chamber 10, and a third side oxygen injection line 531 disposed side by side at the top of the first side oxygen injection line 531. It consists of two side oxygen injection lines 533. The first side oxygen injection line 531 is located adjacent to the air injection unit 40 and continuously supplies air and oxygen to the combustion gas burned from the fuel to ensure complete combustion. The second side oxygen injection line 533 disposed above additionally injects oxygen into the combustion gas that is not completely combusted by the first side oxygen injection line 531 to induce complete combustion.

In particular, the second side oxygen injection line 533 gradually increases the number of oxygen injection nozzles installed from the front to the rear, thereby reducing the proportion of combustion gas discharged without complete combustion, and reducing the amount of combustion gas generated at the initial stage of combustion gas generation. In order to achieve as much complete combustion as possible, more oxygen injection nozzles may be installed at the front than at the rear.

Next, the air injection unit 40 is arranged side by side from one side of the lower combustion chamber 10 into which the solid biomass fuel is inserted and seated, and is used to inject air into the solid biomass fuel. A plurality of air supply channels 41 that receive air, and a plurality of air injection nozzles 43 that are inclined and extended from the plurality of air supply channels 41 toward one upper side and the other side, respectively, and are intersecting are further provided. Including, in the plurality of air supply channels 41, the installation density of the air injection nozzles 43 decreases from one side of the lower combustion chamber 10 to the other side.

The air injection unit 40 is installed at the lower part of the roaster unit 30 and is configured to generate secondary combustion by spraying air on the ash and combustion gas generated when solid biomass fuel is burned. It may include a plurality of air supply channels 41 for receiving air and an air injection nozzle 43 installed there.

The air supply channel 41 extends in the width direction of the lower combustion chamber 10 and has a hollow pipe shape on the inside, so that air delivered from one side is discharged through the air injection nozzle 43.

Here, the air supply channels 41 have a structure in which a plurality of the air supply channels 41 are formed with the same length in the width direction of the lower combustion chamber 10 and are arranged side by side at a predetermined interval, so that air can be supplied to each air supply channel 41. .

The air supplied from the air supply channel 41 is discharged through the air injection nozzle 43 to cause secondary combustion of ash and combustion gas, where the air injection nozzle 43 is located along the axis of the air supply channel 41. It is formed to extend along a direction, and has a structure that extends at an angle toward one upper side and the other side, respectively.

In addition, the air injection nozzles 43 formed in one upper direction and the other direction are arranged to cross each other, so that even if a plurality of air supply channels 41 are placed closely, the air injection nozzles 43 can be prevented from colliding with each other. .

In addition, the air supply channel 41 is arranged side by side along the longitudinal direction from one side of the lower combustion chamber 10, and includes a plurality of first air supply channels 41a in which a plurality of air injection nozzles 43 are formed at high density. A plurality of first air supply channel areas (A) installed at a predetermined interval apart from each other, and a plurality of second air supply channels (41b) formed at a lower density than the air injection nozzles (43) installed in the first air supply channel (41a). ) includes a plurality of second air supply channel areas (B) installed at a predetermined interval, wherein the plurality of first air supply channels (41a) are spaced apart from one another as they move from one side of the lower combustion chamber (10) to the other side. It is characterized by the gradual lengthening of the distance.

The number of air injection nozzles 43 installed in the plurality of air supply channels 41 is different from each other according to a specific method. For example, they are arranged side by side along the longitudinal direction at a position adjacent to one side of the lower combustion chamber 10. The first air supply channel (41a) can be formed with a relatively large number of high-density air injection nozzles (43), and second air injection nozzles (43) are arranged side by side in the first air supply channel (41a) toward the other side of the lower combustion chamber (10). The air supply channel 41b is configured to form a relatively small number of low-density air injection nozzles 43.

This generates the most ash and combustion gas when the solid biomass fuel is input and first burned while seated in the roaster unit 30, and as a result, a lot of air is supplied to the generated combustion gas and ash to cause secondary combustion. In order to do this, the first air supply channel area (A) adjacent to one side of the lower combustion chamber (10) must be supplied with a larger amount of oxygen than the second air supply channel area (B), so the air injection nozzle (43) supplies the first air. The supply channel (41a) has a higher installation density than the second air supply channel (41b).

In addition, the oxygen injection unit 50 includes a front oxygen injection line 51 that injects oxygen in the direction in which combustion gas generated when solid biomass fuel is burned on one side of the lower combustion chamber 10 expands, and It consists of a side oxygen injection line 53 extending along the longitudinal direction of both sides of the lower combustion chamber 10, wherein the side oxygen injection line 53 is an air injection nozzle installed in the plurality of air supply channels 41 ( 43), the installation density decreases from one side to the other side of the lower combustion chamber 10.

As described above, the oxygen injection unit 50 is configured to supply oxygen to combustion gas that has not been burned by secondary combustion to cause tertiary combustion. More specifically, it is located along the width direction on one side of the lower combustion chamber 10. A plurality of front oxygen injection lines 51 are arranged side by side and inject oxygen in the direction in which the generated combustion gas expands, that is, in the longitudinal direction of the lower combustion chamber 10, and a plurality of them are arranged side by side along the longitudinal direction on both sides of the front oxygen injection line 51. It may be made up of a side oxygen injection line (53) made as much as possible.

The front oxygen injection line 51 needs to be equipped with many oxygen injection nozzles in order to induce complete combustion by injecting a large amount of oxygen into the combustion gas generated in the early stage, and the side oxygen injection line disposed toward the rear ( 53) The number of oxygen injection nozzles can be arranged.

Additionally, the oxygen injection nozzle formed in the side oxygen injection line 53 may be configured to correspond to the installation density of the air injection nozzles 43 installed in the plurality of air supply channels 41. For example, the first The oxygen injection nozzles of the side oxygen injection line 53 in the area corresponding to the air supply channel area (A) are relatively high density, and the side oxygen injection line 53 in the area corresponding to the second air supply channel area (B) is relatively high density. The oxygen injection nozzle is formed at a relatively low density and can efficiently supply oxygen depending on the amount of combustion gas generated.

According to a preferred feature of the present invention, an oxygen injection control unit ( (not shown in the drawing), wherein the oxygen injection control unit allows incomplete combustion gas generated by combustion of the solid biomass fuel to pass through the first air supply channel area (A) and into the second air supply channel area (B). When passing through, the combustion gas is burned by increasing the amount of oxygen injection through the oxygen injection nozzle of the side oxygen injection line 53 installed in the area corresponding to the area where the second air supply channel area (B) is installed, resulting in incomplete combustion. It is characterized in that it blocks the gas from spreading to the other end of the lower combustion chamber (10).

The oxygen injection control unit is configured to control the amount of oxygen injected by position rather than being sprayed evenly throughout the entire interior of the upper combustion chamber 10, and is arranged side by side along the longitudinal direction of the side oxygen injection line 53. The amount of oxygen sprayed through the oxygen spray nozzle can be controlled.

In particular, oxygen is supplied to the combustion gas to induce complete combustion, but if some incomplete combustion gas that is not completely burned passes through the first air supply channel area (A) and passes into the second air supply channel area (B), the air However, the amount of oxygen supplied is relatively small, so incomplete combustion gas may be discharged to the outside.

Accordingly, for the purpose of preventing incomplete combustion gas from being discharged to the outside, the oxygen injection control unit adjusts the amount of incompletely burned combustion gas generated in the first air supply channel area (A) to the second air supply channel area ( Since there is more than B), the oxygen injection control unit is in the first air supply channel area (A) in a state in which the combustion gas generated by combustion of the solid biomass fuel is not completely burned even by secondary combustion and tertiary combustion but is incompletely burned. When passing through the second air supply channel area (B), the oxygen is delivered through the oxygen injection nozzle of the side oxygen injection line (53) installed in the corresponding area of the area where the second air supply channel area (B) is installed. By increasing the amount of oxygen injection to combust the combustion gas, it can act as an air curtain to prevent incomplete combustion gas from spreading to the other end of the lower combustion chamber 10.

According to a preferred feature of the present invention, the roaster unit 30 includes a pair of frames 33 extending along the longitudinal direction from both upper sides of the lower combustion chamber 10, and the pair of frames 33. A rostol body 37 in which a plurality of rostol rods 35 twisted in one direction are arranged side by side at a predetermined interval, and a plurality of rostol rods disposed in the rostol main body 37, It is formed between (35) and includes a plurality of tunnels (39) formed to smoothly supply air sprayed from the air injection unit (40) installed at the lower part of the roaster unit (30).

The pair of frames 33 are installed to extend along the longitudinal direction of the lower combustion chamber 10, and a plurality of roasting bodies 37 are arranged side by side between them.

In the rostol body 37, rostol rods 35 twisted in one direction may be closely arranged along the longitudinal direction of the rostol body 37, and the air injection unit ( A plurality of tunnels 39 are formed to smoothly supply the air sprayed from 40, so that the air passes through the Rostol rod 35 and moves upward, thereby increasing combustion efficiency.

According to a preferred feature of the present invention, the plurality of air injection nozzles 43 formed in the air supply channel 41 include a plurality of first air injection nozzles inclined upward toward one side of the lower combustion chamber 10 ( 43a) and a plurality of second air injection nozzles (43b) inclined upward toward the other side of the lower combustion chamber (10) and intersecting with the first air injection nozzle (43a), wherein the second air supply The air supply channel 41 installed from the starting point of the channel area B to the other side of the lower combustion chamber 10 is located at the position where the first air injection nozzle 43a is installed between the plurality of second air injection nozzles 43b. It is characterized in that a third air injection nozzle (43c) is formed at a position corresponding to.

The plurality of air injection nozzles 43 of the air supply channel 41 installed in the area corresponding to the first air supply channel area A include a first air injection nozzle 43a and a second air injection nozzle 43b. It has a cross-positioned shape, and a third air injection nozzle (43c) is additionally installed in the air supply channel (41) installed from the starting point of the second air supply channel area (B) to the other side of the lower combustion chamber (10). It can be.

According to a preferred feature of the present invention, it further includes an air injection control unit (not shown) that controls the amount of air sprayed from the air injection unit 40 to be sprayed differently along the longitudinal direction of the lower combustion chamber 10; , the air injection control unit, when the combustion gas passes through the first air supply channel area (A) and the second air supply channel area (B), corresponds to the area where the second air supply channel area (B) is installed. It is characterized in that the combustion gas is burned by increasing the amount of air injection through the third air injection nozzle (43c) among the air injection nozzles (43) of the air supply channel (41) installed in the area.

Like the oxygen injection control unit described above, the air supply control unit is configured to control the amount of air injected. More specifically, the second air supply channel is used to prevent combustion gas from being discharged to the outside in an incompletely combusted state. It is configured to burn combustion gas by additionally supplying and injecting air into the third air injection nozzle (43c) formed at (41b).

The third air injection nozzle (43c) may be disposed between a plurality of second air injection nozzles (43b) arranged at regular intervals, and the combustion gas is not completely burned up to the second air supply channel area (B). In the case of diffusion, additional air is injected from the third air injection nozzle (43c) to supply a larger amount of air, thereby increasing the combustion efficiency of secondary combustion.

Additionally, the third air injection nozzle 43c may have the same size and shape as the first air injection nozzle 43a and the second air injection nozzle 43b, and may be longer than the first air injection nozzle 43a. It can be made in a form that can be extended in multiple stages to be long, so it can have a shape that can supply air from a higher position.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the embodiments described in this specification and the configuration shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention. Since this is not the case, it should be understood that there may be various equivalents and modifications that can replace them at the time of filing this application. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the claims described later rather than the detailed description, and the meaning and scope of the claims and their All changes or modified forms derived from the equivalent concept should be construed as falling within the scope of the present invention.

10: Lower combustion chamber
20: upper combustion chamber
30: Rostolbu
40: air injection unit
50: Oxygen injection unit

Claims (8)

A lower combustion chamber in which solid biomass fuel is input and combustion occurs, an upper combustion chamber assembled in an upper part of the lower combustion chamber and combustion of combustion gas generated by combustion of solid biomass fuel, and an upper inside of the lower combustion chamber. It relates to an air and oxygen supply device installed in a combustion chamber including a roaster unit in which solid biomass fuel is installed and rotates the solid biomass fuel in the circumferential direction by the operation of a conveyor belt,
It is installed in the lower part of the roaster unit, injects air into the solid biomass fuel seated at the top, and is arranged side by side from one side toward the other side of the lower combustion chamber into which the solid biomass fuel is input and seated, and the solid biomass fuel is placed side by side toward the other side. It includes a plurality of air supply channels that receive air for spraying air into the biomass fuel, and a plurality of air injection nozzles that are inclined and extended from the plurality of air supply channels toward one upper side and the other side, respectively, and are intersecting. air injection unit; and
It is arranged side by side along the lower circumference of the upper combustion chamber, injects oxygen into the combustion gas generated by combustion of the solid biomass fuel, and expands the combustion gas generated by combustion of the solid biomass fuel on one side of the lower combustion chamber. An oxygen injection unit including a front oxygen injection line that sprays oxygen in a direction and a side oxygen injection line extending along the longitudinal direction of both sides of the lower combustion chamber;
Air and oxygen supply device including. According to paragraph 1,
The front oxygen injection line receives oxygen from a first oxygen supply line extending downward from one upper side of the upper combustion chamber and sprays it toward the inside of the upper combustion chamber,
The side oxygen injection line receives oxygen from a second oxygen supply line extending along the longitudinal direction on both sides of the lower part of the upper combustion chamber and sprays it toward the inside of the upper combustion chamber.
An air and oxygen supply device comprising a first side oxygen injection line formed adjacent to the upper part of the lower combustion chamber, and a second side oxygen injection line disposed side by side at the upper part of the first side oxygen injection line. According to paragraph 1,
The air and oxygen supply device is characterized in that the installation density of the air injection nozzles in the plurality of air supply channels decreases from one side to the other side of the lower combustion chamber. According to paragraph 3,
The side oxygen injection line is an air and oxygen supply device characterized in that the installation density of the side oxygen injection line decreases from one side to the other side of the lower combustion chamber to correspond to the installation density of the air injection nozzles installed in the plurality of air supply channels. According to clause 4,
The air supply channel is,
A first air supply channel area arranged side by side along the longitudinal direction from one side of the lower combustion chamber and in which a plurality of first air supply channels in which a plurality of air injection nozzles are formed at high density are installed at a predetermined interval, and the first air supply channel area It includes a second air supply channel area in which a plurality of second air supply channels formed at a lower density than the air injection nozzles installed in the air supply channel are installed at a predetermined interval,
An air and oxygen supply device, wherein the distance between the plurality of first air supply channels gradually increases as it moves from one side of the lower combustion chamber to the other side. According to clause 5,
It further includes an oxygen injection control unit that controls the amount of oxygen injected from the side oxygen injection line of the oxygen injection unit to be differently injected along the longitudinal direction of the lower combustion chamber,
The oxygen injection control unit,
When the incomplete combustion gas generated by combustion of the solid biomass fuel passes through the first air supply channel area and passes through the second air supply channel area, the second air supply channel area is installed in the corresponding area of the area where the second air supply channel area is installed. An air and oxygen supply device characterized by blocking incomplete combustion gases from spreading to the other end of the lower combustion chamber by burning combustion gases by increasing the amount of oxygen injection through the oxygen injection nozzle of the side oxygen injection line. According to clause 5,
A plurality of air injection nozzles formed in the air supply channel,
A plurality of first air injection nozzles inclined upward toward one side of the lower combustion chamber, and a plurality of second air injection nozzles inclined upward toward the other side of the lower combustion chamber and intersecting the first air injection nozzles. Including,
The air supply channel installed from the starting point of the second air supply channel area to the other side of the lower combustion chamber has a third air injection nozzle at a position corresponding to the position where the first air injection nozzle is installed between the plurality of second air injection nozzles. An air and oxygen supply device characterized in that it is formed. In clause 7,
It further includes an air injection control unit that controls the amount of air sprayed from the air injection unit to be sprayed differently along the longitudinal direction of the lower combustion chamber,
The air injection control unit,
When the combustion gas passes through the first air supply channel area and the second air supply channel area, the third air injection nozzle of the air supply channel installed in the area corresponding to the area where the second air supply channel area is installed is blown. An air and oxygen supply device that combusts combustion gas by increasing the amount of air injection through a nozzle.