KR101841168B1 - Organic-waste gasifier - Google Patents

Abstract

It is an object of the present invention to provide an apparatus for gasification of an organic material for converting solid organic material fuel resources into high quality gaseous fuel, which is characterized in that it comprises an organic substance which dilutes oxygen with a high temperature combustion gas and performs preheating, And a gasification device. Another object of the present invention is to provide an apparatus for gasification of an organic material capable of reducing the air supply device and increasing the gasification efficiency by mixing such combustion gas by using a nozzle of the Coanda effect and a Venturi tube .

Description

[0002] Organic-waste gasifier [0003]

The present invention relates to an apparatus for gasification of organic materials. More particularly, the present invention relates to an apparatus for gasification of organic materials for converting solid organic material fuel resources such as combustible wastes, biomass, dried wastewater sludge, coal and the like into high quality gaseous fuel, 0002] The present invention relates to an apparatus for gasification of an organic substance, which improves gasification efficiency by using a tube.

In recent years, environmental pollution and resource depletion are becoming serious, and various studies are actively conducted to solve these problems. One of the major challenges in addressing environmental pollution is the need to effectively dispose of the wastes that are incredibly generated around the world. These wastes range from household waste generated by ordinary individuals to large quantities of wastes generated by facilities such as factories. Particularly, in the case of flammable waste, in the past, a method of decomposing waste by using only incineration has been used in many cases. In this process, many environmental pollutants have been generated. On the other hand, the main problem to be solved in resource depletion problem is finding a high efficiency energy resource that can replace fossil fuels that are depleted. One of them is a gasification technology for converting solid organic material fuel resources such as combustible wastes, biomass, dried wastewater sludge, low grade coal and the like into high quality gaseous fuel. By using such gasification technology, it is possible to efficiently treat waste generated in large quantities, and at the same time to obtain a high-quality gas-phase fuel, it is possible to obtain a dual effect of solving environmental pollution problem and resource depletion problem at once, Research is being conducted.

Regarding this gasification technology, the principle is clearly shown in Korean Patent Registration No. 0952609 ("Upstream / down ventilation type complex gasification system ", Apr. 4, 2010). A brief explanation is as follows. Generally, the solid fuel material consists of hydrocarbon-based materials. When heated in anoxic or hypoxic condition, volatile matter is separated and char is liberated, which is referred to as pyrolysis. In addition, when carbon dioxide and water vapor are supplied to the char in an appropriate temperature environment, the reaction occurs and the conversion to gaseous fuel such as CO, H ₂ , and CH ₄ is performed. This process is called pyrolysis gasification process, and most of the intermolecular reaction is an endothermic reaction, so it is necessary to supply the reaction heat to the pyrolysis gasification unit. In some cases, a separate external heat source is used to supply the heat of reaction. However, in order to obtain high-temperature carbon dioxide and water vapor necessary for an energy-efficient problem or a gasification reaction, a partial combustion method is generally used.

Partial combustion pyrolysis gasification system is a method of injecting air as an oxidant into waste, that is, organic material, and it is divided into a bottom-up type and a top-down type depending on the direction of introduction of the oxidizing agent. Fig. 1 shows such a conventional pyrolysis gasification apparatus. Fig. 1 (A) shows a bottom gasification system and Fig. 1 (B) shows a top-down gasification system. First, the bottom-up gasification system is a method of supplying waste (organic material) from the upper part and supplying oxidant (air) from the lower part. The combustion layer is formed at the lower part and the heat is transferred to the upper part, (Char, C) with H ₂ O and CO ₂ in the combustion gas to produce a combustible gas composed mainly of CO, H ₂ , and CH ₄ . The bottom-up gasification system has an advantage in that the amount of residual carbon in the ash is small because the residual gas remaining after the gasification reaction is burnt in the combustion bed of the lowest layer, while the gas generated in the gasification layer passes through the upper drying and pyrolysis layers There is a disadvantage that the temperature is lowered and a large amount of tar generated in the pyrolysis process is contained. On the other hand, the downward gasification system is a system in which waste (organic substance) is fed from the upper part and oxidizing agent (air) is fed from the upper part, and a combustion layer made of insufficient air is formed on the organic matter, , And the organic matter is pyrolyzed to liberate the flue gas. The flue gas reacts with H ₂ O and CO ₂ produced in the partial partial combustion process to produce flammable gas composed mainly of CO, H ₂ , and CH ₄ . The down-stream gasification system is disadvantageous in that the gas is only consumed by the gasification reaction, and thus there is a disadvantage that a relatively large amount of carbon (C) remains in the final ash, while the gasification layer is hot, ) Layer and the pyrolysis layer, so that there is an advantage that a large amount of tar is not contained in the combustible gas.

In both of the above-mentioned pyrolysis and gasification methods, only the air of about 30% of the theoretical air amount is supplied to the partial combustion, so that the injection speed can be maintained by decreasing the diameter of the air nozzle, It is difficult to obtain a sufficient amount of momentum to penetrate deeply and it is difficult to maintain a uniform combustion layer. Particularly, when air at room temperature is used, there is a problem that it is difficult to maintain the combustion layer in a deficient air condition due to a decrease in combustion reactivity.

1. Korea Patent Registration No. 0952609 ("Upstream and down ventilation type complex gasification system", 2010.04.06)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an apparatus for gasification of organic materials for converting solid organic material fuel resources into high quality gaseous fuel, And an apparatus for gasification of an organic substance which dilutes oxygen with a combustion gas at a high temperature and performs preheating to increase the gasification efficiency. Another object of the present invention is to provide an apparatus for gasification of an organic material capable of reducing the air supply device and increasing the gasification efficiency by mixing such combustion gas by using a nozzle of the Coanda effect and a Venturi tube .

According to an aspect of the present invention, there is provided an apparatus for gasification of an organic material, the apparatus comprising: a gasification apparatus (100) for supplying an organic substance to a gasification reactor, A gasification furnace (110) into which waste and an oxidant are introduced and in which a pyrolysis gasification reaction occurs; A combustion chamber 120 for receiving a combustible gas discharged from the gasification furnace 110 and burning the combustible gas to generate a combustion gas; A jetting unit 200 for mixing the combustion gas and the additional gas discharged from the combustion chamber 120 and supplying the mixed gas to the gasification furnace 110 as an oxidant; . ≪ / RTI >

At this time, the injector 200 may be composed of a mixed discharge device in which the combustion gas flows into the main path, the auxiliary path passes the additional gas, and the combustion gas and the additional gas are mixed and discharged. Wherein the mixed discharge device comprises at least one Coanda nozzle 210 or at least one Venturi tube 220 or at least one Coanda nozzle 210 and at least one Venturi tube 220 And may be a combined body formed by sequentially bonding.

In this case, in the case where the mixed discharge device is the Coanda nozzle 210, the Coanda nozzle 210 is supplied with the additional gas and injected into the inside thereof, And is sucked through the suction part 213, and the combustion gas and the additional gas are mixed and discharged to the discharge part 214. [ Alternatively, when the mixing and discharging device is a venturi tube 220, the venturi tube 220 is supplied with the combustion gas to one side, and the additional gas is additionally supplied through the gap, and the additional gas is further mixed with the combustion gas .

The additional gas may be compressed air or a combustion gas.

In this case, the organic gasification apparatus 100 may include a joint body in which the spray unit 200 is formed by sequentially joining the Coanda nozzle 210 and at least one Venturi tube 220, When a single tube 220 is provided, the inflow part 221 of the single venturi tube 220 may be connected to the discharge part 214 of the Coanda nozzle 210 with a gap. Alternatively, when the organic gasification apparatus 100 is provided with N (N is a natural number of 2 or more) tubes, the discharge port 214 of the Coanda nozzle 210 is connected to the first vent The inlet 221 of the n-bent tube 220 is connected to the outlet 222 of the n-1 bent tube 220 and the inlet 221 of the n-bent tube 220 is connected to the outlet of the Sequential serial connections (n = 2, ..., N) connected with a gap can be made.

The gasification apparatus 100 of the organic material may further include an exhaust gas purifying apparatus 200 for purifying exhaust gas from the combustion gas and the additional gas discharged from the Coanda nozzle 210 with respect to the amount of combustion gas sucked from the Coanda nozzle 210, Can be formed.

The gasification apparatus 100 of the organic material may further include a combustion gas discharged through the Coanda nozzle 210 and the Venturi tube 220 with respect to the amount of combustion gas sucked in the Coanda nozzle 210, And may be 50 to 100 times the amount of the gas mixture.

In addition, the Coanda nozzle 210 has a double pipe structure including an outer body 211 and an inner body 212, wherein one end of the pipe forms a suction portion 213 for sucking gas from the outside, And the flow path 215 is formed so as to be tapered so as to have a larger diameter toward the discharge part 214. The discharge path 214 is formed in the discharge path 214, The space between the two tubes is formed with an additional gas inlet 216 through which the additional gas is introduced through the additional gas inlet pipe 216a while one side and the other end are sealed and the additional gas inlet 216 and / The flow path 215 is connected to the suction portion 213 side by an additional gas supply path 217 formed in the form of a gap between the external body 211 and the internal body 212, The supply path 217 is inclined toward the discharging portion 214 side Is formed in a direction, whereby said additional gas is injected through the addition unit 217 as the feed gas, may be made such that by the Coanda effect via the suction part 213, the gas is sucked from the outside.

The inner body 211 and the inner body 212 are coupled to each other by the threaded portion 218 and the threaded portion 218 is rotated by the rotation of the threaded portion 218, The gap size of the additional gas supply path 217 can be adjusted.

The venturi tube 220 includes an inlet 221 formed in a tube shape and through which gas flows, a discharge portion 222 formed in a tube shape having a smaller diameter than the inlet 221 and discharging the gas, And an inclined portion 223 connecting the inflow portion 221 and the discharge portion 222.

Also, the organic material gasification apparatus 100 may be a bottom-up type in which waste is supplied from the upper portion of the gasification furnace 110 and the oxidant is injected from the lower portion of the gasification furnace 110 to proceed upward, The oxidant may be supplied from the upper portion of the gasification furnace 110 and the oxidant may be supplied from the upper portion of the gasification furnace 110 to be downwardly directed downward.

Also, the organic gasification apparatus 100 may include a storage tank 130 for receiving and storing the combustible gas discharged from the gasification furnace 110; As shown in FIG.

According to the present invention, in the process of converting the solid organic material fuel resources into the high-quality gas phase fuel by using the pyrolysis gasification reaction, the gasification efficiency can be remarkably improved as compared with the conventional method. More specifically, in the case of the partial combustion pyrolysis gasification reaction, since the amount of air to be supplied is smaller than the theoretical air amount required for combustion, the volume of supplied air is small. When the nozzle diameter is increased, the injection flow rate and penetration distance are sufficient There is a problem that an active reaction does not occur. However, in the case of the present invention, since the volume of the inert combustion gas in the combustion chamber can be greatly increased to increase the volume, the injection flow rate and the penetration distance can be sufficiently secured even if the same nozzle is used, and ultimately, It is.

Further, according to the present invention, there is a problem that localized melting occurs due to a high oxygen concentration at the nozzle outlet for supplying the oxidizing agent, i.e., air. However, according to the present invention, since the combustion gas and oxygen are mixed and supplied to fundamentally solve such a local melting problem, It is possible to maintain uniform combustion and to improve the safety and stability.

In addition, since the additional inert gas is a high temperature and contains a large amount of materials necessary for the reaction, it is possible to more actively react with the preheating effect for the pyrolysis gasification reaction, thereby further improving the gasification efficiency have.

In addition, according to the present invention, the amount of air supplied to the gasification reaction unit can be dramatically increased by the combination of the nozzle of the Coanda effect and the Venturi tube, thereby enabling a reduction in the design of the air supply device, And there is a great effect that the gasification efficiency can be further improved.

1 is a schematic view of a conventional pyrolysis gasification apparatus.
2 is an embodiment of the pyrolytic gasification apparatus of the present invention.
3 is another embodiment of the pyrolytic gasification apparatus of the present invention.
4 shows various examples of the configuration of the injection part.
5 is an exploded perspective view of an embodiment of a jetting part.
6 is a cross-sectional view of one embodiment of a dispensing portion.
7 is a cross-sectional view of another embodiment of a dispensing portion.

Hereinafter, an apparatus for gasifying an organic material according to the present invention having the above-described structure will be described in detail with reference to the accompanying drawings.

FIG. 2 shows one embodiment of the pyrolytic gasification apparatus of the present invention, and FIG. 3 shows another embodiment of the pyrolytic gasification apparatus of the present invention. The organic material gasification apparatus 100 of the present invention is basically an apparatus for producing a gaseous fuel by supplying a waste made of an organic material and injecting an oxidizing agent to cause pyrolysis and gasification reaction. As compared with the conventional gasification apparatus, By improving the supply configuration, the gasification efficiency is greatly improved as compared with the conventional one. 2 and 3, a gasification apparatus 100 for organic material according to the present invention is basically composed of a gasification furnace 110, a combustion chamber 120, and a jetting section 200 And may further include a storage tank 130 for receiving and storing the combustible gas discharged from the gasification furnace 110 as shown in FIG. Hereinafter, each part will be described in more detail.

The gasification furnace 110 is a place where pyrolysis gasification reaction occurs due to the input of waste and oxidizer. 1, the conventional pyrolysis gasification apparatus may have a bottom-up type or a bottom-up type. The gasification apparatus 100 of the present invention may also be a bottom-up type as shown in FIG. 2 or a top- have. That is, as shown in FIG. 2, the gasification apparatus 100 of the present invention is a bottom-up type gasification apparatus in which waste is charged at an upper portion of the gasification furnace 110 and oxidant is introduced at a lower portion of the gasification furnace 110, Alternatively, as shown in FIG. 3, waste may be supplied at the top of the gasification furnace 110, and the oxidizing agent may also be introduced at the top of the gasification furnace 110 to be downwardly directed downward.

As shown in FIG. 1, it is sufficient to merely include the waste and the oxidizing agent in the reactor to cause the reaction, as shown in FIG. 1, so that the gasification furnace 110 alone constitutes the conventional gasification apparatus. On the other hand, the oxidizing agent is a reactive gas for causing a pyrolysis gasification reaction as described above, and air containing oxygen is generally used as an oxidizing agent. However, in the conventional case, when the oxidizing agent (i.e., air) is supplied in order to cause the reaction as described above, due to various problems such as a problem of insufficient injection flow velocity and insufficient penetration distance and local melting due to excessive oxygen concentration, There was a problem that it was difficult to raise it beyond the limit.

In order to solve these problems, in the present invention, unlike the conventional system in which only air is supplied as the oxidizer, a part of the combustible gas (i.e., high-quality gas-phase fuel) discharged from the gasification furnace 110 is burned to generate an inert combustion gas And then the additional gas is mixed with the combustion gas and supplied as an oxidizing agent. The combustion chamber 120 and the jetting unit 200 are configured as described above. The combustion chamber 120 receives a combustible gas discharged from the gasification furnace 110 to generate a combustion gas to burn the combustion gas. The injection unit 200 mixes the combustion gas and the additional gas discharged from the combustion chamber 120 And supplied to the gasification furnace 110 as an oxidizing agent. The position of the combustion chamber 120 and the injector 200 is determined by whether the gasifier 110 is a bottom-up type or top-down type, that is, whether a combustible gas is discharged from the top (= As shown in FIGS. 2 and 3, depending on whether the oxidizing agent is discharged from the upper portion (= the oxidizing agent is injected from the upper portion). Further, the upper and lower positions and the like can be changed in any way by appropriately extending the pipeline, and the present invention is not limited to the configurations shown in FIG. 2 and FIG.

The injecting unit 200 may be a mixed discharge device that receives the combustion gas into the main path and the auxiliary path through the additional gas, and mixes and discharges the combustion gas and the additional gas. Wherein the mixed discharge device comprises at least one Coanda nozzle 210 or at least one Venturi tube 220 or at least one Coanda nozzle 210 and at least one Venturi tube 220 And may be a combined body formed by sequentially bonding.

In this case, in the case where the mixed discharge device is the Coanda nozzle 210, the Coanda nozzle 210 is supplied with the additional gas and injected into the inside thereof, And is sucked through the suction part 213, and the combustion gas and the additional gas are mixed and discharged to the discharge part 214. [ Alternatively, when the mixing and discharging device is a venturi tube 220, the venturi tube 220 is supplied with the combustion gas to one side, and the additional gas is additionally supplied through the gap, and the additional gas is further mixed with the combustion gas . Of course, the mixing and discharging device may be a combination of various combinations of the Coanda nozzle 210 and the Venturi tube 220. In this case, too, the combustion gas can be injected into the main path, And supplied to the gasification furnace 110 as an oxidizing agent.

Here, the additional gas to be mixed with the combustion gas is preferably compressed air, but it is possible to carry out various modifications such as mixing the combustion gas into the combustion gas by causing the additional gas to become a combustion gas. Various embodiments of the configuration of the jetting unit 200 and various troubleshooting principles therefrom will now be described in more detail.

[Various Configuration Examples and Effects of the Injection Part]

FIG. 4 shows various configurations of the jetting unit 200. As shown in FIG. As described above, the jetting unit 200 may be a mixed discharge device that receives the combustion gas into the main path, receives the auxiliary gas into the auxiliary path, and mixes and discharges the combustion gas and the additional gas. (A). That is, the mixing / discharging device constituting the jetting unit 200 includes a main path / a sub-path / (a mixture of a combustion gas and an additional gas) for discharging the main path / (receiving the additional gas) The present invention is not limited thereto.

4 (B) shows a case where the mixed discharge device constituting the jetting section 200 is one Coanda nozzle. As will be described in detail later, generally, the Coanda nozzle is a device configured to draw a working fluid into a main path by flowing a working fluid into a secondary path and has all the conditions of the above-described mixed discharge device configuration. Can be employed. On the other hand, FIG. 4 (B) shows a case where the mixing and discharging apparatus constituting the jetting unit 200 is made up of one Coanda nozzle, but the present invention is not limited thereto. For example, May be connected in series.

Fig. 4 (C) shows a case where the mixed discharge device constituting the jetting section 200 is one venturi tube. As is well known, a venturi tube is a tube having a diameter of a discharge part narrower than an inflow part. In general, a pipeline fitting the inflow part is connected to introduce a fluid, so that a part corresponding to a secondary path is not formed. However, as shown in Fig. 4 (C), when a gap is formed between the inlet and the pipeline, the external fluid can flow into the gap between the inlet and the pipeline. At this time, a path through which the fluid flows along the pipeline may become the main path, and a gap through which the external fluid flows may be a secondary path. In this case, too, the conditions of the mixed discharge device configuration So that it can be employed as a mixed discharge device. On the other hand, FIG. 4 (C) shows a case where the mixing and discharging apparatus constituting the jetting unit 200 is composed of one venturi tube, but the present invention is not limited thereto. For example, May be connected in series.

4 (D) is a more preferred embodiment of a combined body in which a single Coanda nozzle and one Venturi tube are sequentially combined. At this time, the combustion gas and the auxiliary gas are introduced into the main path of the coanda nozzle, and the mixed gas of the combustion gas and the additional gas as the main path of the venturi tube connected to the discharge path side of the coanda nozzle, So that the additional gas is introduced into the path (the configuration of the embodiment of Fig. 4 (D) will be described in detail later). 4D shows a case where the mixing and discharging device constituting the jetting section 200 is composed of [one coanda nozzle + one venturi tube], but the present invention is not limited thereto, To change to various combinations such as [one Coanda Nozzle + multiple Venturi tubes] / [multiple Coanda Nozzles + one Venturi tube] / [multiple Coanda Nozzles + multiple Venturi tubes] Is possible.

As described above, the jetting unit 200 serves to inject a mixed gas of a combustion gas and an additional gas into the gasification furnace 110 as an oxidizing agent. That is, the additional gas supplied to the secondary path of the jetting unit 200 may be a gas containing oxygen, preferably compressed air, so that it can act as an oxidant. Particularly, in the case where the jetting section 200 is composed of a combination of two or more Coanda nozzles 210 or a Venturi tube 220, the additional gas may be a combustion gas, In at least one of the nozzles 210 and the venturi tube 220, the additional gas may be compressed air and the remaining additional gas may be a combustion gas.

More specifically, it is as follows. The gas finally discharged from the jetting unit 200 must be contained in the gasification furnace 110 because it ultimately must act as an oxidizing agent. In this case, when the additional gas introduced into the jetting unit 200 is compressed air, since 21% of the air is made of oxygen, sufficient oxygen can be supplied even when mixed with the combustion gas, Can be used. On the other hand, when the additional gas is composed only of the combustion gas, the combustion gas can not act as an oxidizing agent because it is an inert gas for the gasification reaction. In this regard, it is preferable that some of the additional gas introduced into the jetting unit 200 is compressed air containing oxygen.

However, actually, the combustion gas discharged from the gasification furnace does not come out by burning 100%. Because the actual combustion can not be 100% burned by the theoretical air amount, the excess air is always used. However, in the case of a gaseous fuel, the excess air ratio is low, so that the concentration of oxygen remaining in the combustion gas is low. Specifically, it is known that residual gas in the combustion gas remains in the range of 3-5% in the case of the gas. That is, even if the additional gas flowing into the jetting section 200 becomes a combustion gas, that is, even if the oxidizing agent supplied to the gasification furnace 110 is composed of [combustion gas + combustion gas], actually, It can be performed to some extent as an oxidizing agent. On the other hand, even if a part of the additional gas introduced into the jetting section 200 is made of combustion gas, the important characteristic of the combustion gas is a high-temperature gas. The reaction heat can be replaced with a desired effect.

Hereinafter, various effects that can be obtained when a mixed gas of a combustion gas and an additional gas is introduced as an oxidizing agent will be described in more detail.

■ Increase efficiency of gasification reaction by increasing jet flow rate and ensuring penetration distance

In order to remedy the conventional problem, air is generally used as an oxidizing agent in the pyrolysis gasification apparatus. The air required for combustion for gasification requires only about 30% of the theoretical air amount required for burning organic matter, The volume is much less than the amount of air required for actual combustion. However, when the amount of air supplied is reduced, it is difficult to penetrate the inside of the organic material. In the past, attempts have been made to introduce a design that reduces the diameter of the injection nozzle to increase the injection flow rate in order to solve the infiltration distance uncertainty problem. However, there is a limit in reducing the diameter of the spray nozzle. Even if the spraying flow rate is increased to increase the penetration distance, the absolute amount of the oxidizing agent supplied is insufficient, thereby limiting the efficiency of gasification reaction.

However, in the present invention, as described above, the inert gas and the additional gas are mixed in the injector 200 to be supplied as the oxidizer, so that the air supply amount (that is, the oxidant supply amount) The amount can be increased much more than before. Also, as the air supply amount for forming the combustion layer is much increased, the injection flow rate can be rather increased even when the conventional combustion nozzle having a large diameter is used, and the penetration distance to the inside of the combustible material can be increased. Accordingly, there is no need to reduce the diameter of the nozzle, and as the penetration distance increases, the gasification furnace 110 can be formed in a larger size.

■ Prevention of local melting due to oxygen dilution and increased efficiency of gasification reaction due to uniform combustion

Another problem in the related art is that the amount of air supplied is less than the theoretical air as a whole, while the oxygen content in the air is locally maintained at 21% in the region near the nozzle injection, that is, the temperature of the combustion layer in the region near the nozzle injection is locally There is a problem that clinker occurs or local melting occurs.

However, in the case of the present invention, a mixed gas of a combustion gas and an additional gas is injected as an oxidizing agent. Since a combustion gas (which is an inactive gas, i.e., does not generate heat) is mixed in the additional gas, The problem of local overheating can be excluded from the source. This, of course, will eventually lead to consistent combustion throughout the combustion bed. In addition, as described above, when a plurality of devices each having a main path / secondary path are connected to each other, a part of the additional gas is made to be a combustion gas instead of the compressed air, and the oxygen dilution effect and the local overheating prevention effect Can be further improved.

■ Effect of gasification reaction efficiency by high temperature preheating even in oxygen dilution

On the other hand, even if the oxygen concentration is lowered by supplying the mixed gas of the combustion gas and the additional gas as the oxidizing agent as described above, the effect of the efficiency deterioration is not so large due to the following effects. That is, since the combustion gas is extremely hot, the temperature of the oxidizing agent supplied is rapidly heated to 800 ° C or higher. In other words, the effect of preheating at a high temperature can be obtained. As a result, It can be done.

In addition, when the combustion gas is mixed with the oxidizing agent as in the present invention, H ₂ O and CO ₂ contained in the combustion gas react with the gas (C) produced in the thermal decomposition layer to generate combustible gas of CO and H ₂ , That is, the gasification reaction efficiency can be further improved.

In addition, as described above, when a plurality of devices each having a main path / secondary path are connected to each other, the part of the additional gas is made to be a combustion gas instead of the compressed air, thereby further improving the high temperature preheating effect and the gasification reaction efficiency can do.

■ Other effects

As described above, according to the present invention, the oxidizing agent supplied to the gasification furnace 110 by the injector 200 is composed of a mixed gas of a combustion gas and an additional gas, so that the complex and various gasification efficiency improvement and stabilization There is a big advantage to getting the effect.

In addition, according to the present invention, the combination of the Coanda nozzle 210 and the Venturi tube 220 generates a mixed gas having a much larger volume and a higher temperature than that of the Coanda nozzle 210 alone can do. Accordingly, it is possible to reduce the size of the injection unit 200, and ultimately, the stable formation effect of the combustion layer and the gasification efficiency can be further improved.

Hereinafter, the detailed configuration will be described in more detail with reference to the first and second embodiments, which are preferred embodiments of the jetting unit 200. FIG.

[First Embodiment of Dispensing Section]

In the first embodiment of the jetting unit 200, the jetting unit 200 includes the Coanda nozzle 210 and the single venturi tube 220. The first embodiment of the jetting unit 200 is the same as the embodiment shown in Fig. 4 (D), Fig. 5 is an exploded perspective view of the jetting unit of the first embodiment, and Fig. 6 is a more detailed sectional view thereof .

First, the Coanda nozzle 210 will be described. Coanda effect refers to a phenomenon in which air currents that are ejected from a wall or a ceiling are sucked and flowed on the surface. In this case, since only one side diffuses, the attenuation of velocity is smaller than that of free classification, And has a long flow characteristic. The Coanda nozzle 210 causes the combustion gas to be sucked by the Coanda effect by supplying the additional gas, and consequently, the combustion gas and the additional gas are mixed and discharged.

The construction of the Coanda nozzle 210 will be described in more detail as follows. As shown in the cross-sectional view of FIG. 6, the Coanda nozzle 210 basically has a double pipe structure including an outer body 211 and an inner body 212. At this time, the one end of the double pipe forms the suction portion 213 for sucking the gas from the outside, and the other end forms the discharge portion 214 discharging the gas to the outside, . In addition, the flow path 215 is tapered so as to have a larger diameter toward the discharge portion 214.

At this time, as shown in FIG. 6, the space between the dual pipes is formed with an additional gas inlet 216 through which the additional gas is introduced through the additional gas inlet pipe 216a while one side and the other end are sealed. The additional gas inlet 216 and the flow passage 215 are connected to the additional gas supply passage 217 formed in the form of a gap between the external body 211 and the internal body 212 on the suction portion 213 side. , And the additional gas supply path 217 is formed in a direction inclined toward the discharge portion 214 side.

Accordingly, when the additional gas is injected through the additional gas supply path 217, the additional gas flows along the wall surface of the flow path 215 tapered as indicated by an arrow in FIG. 6, The gas is sucked from the outside through the suction portion 213. [ In the case of the present invention, the gas sucked into the suction unit 213 is mixed with the combustion gas supplied from the combustion chamber 120, that is, the combustion gas is discharged through the discharging unit 214 do.

As described above, the Coanda nozzle 210 mixes and discharges the combustion gas and the additional gas, thereby ultimately greatly increasing the flow rate of the oxidizing agent supplied to the gasification furnace 110. At this time, the control of the mixed gas amount or the flow rate may be performed through the pressure of the additional gas supplied to the Coanda nozzle 210 or the gap of the additional gas supply path 217. The outer body 211 and the inner body 212 are coupled to each other by the threaded engaging portion 218 and the threaded engaging portion 218 is rotated by the rotation of the threaded engaging portion 218, The gap size of the additional gas supply path 217 can be adjusted.

In addition to increasing the flow rate of the oxidant using the Coanda nozzle 210, the present invention further includes the Venturi tube 220 in the Coanda nozzle 210 as shown in FIGS. 5 and 6 , The oxidizer flow rate is further increased.

The venturi tube 220 is formed in a tube shape and has an inlet 221 into which gas flows, a discharge unit 222 formed in the shape of a tube having a diameter smaller than that of the inlet 221, And an inclined portion 223 connecting the inflow portion 221 and the discharge portion 222. In other words, the gas introduced into the inflow portion 221 passes through the slope portion 223 and is discharged to the discharge portion 222 at a higher flow rate.

In this case, the venturi tube 220 is provided in the first embodiment, and the gasification apparatus 100 of the organic material includes the discharge portion 214 of the Coanda nozzle 210, And the inlet 221 of the single Venturi tube 220 is connected with a gap. 6, the gap between the Coanda nozzle 210 and the Venturi tube 220 forms an additional gas supply path 221a. The additional gas is further supplied through the additional gas adding path 221a.

The amount of the oxidizing agent supplied to the gasification furnace 110 by the injecting unit 200 is equal to the sum of the combustion gas supplied from the combustion chamber 120 and the additional gas a supplied from the Coanda nozzle 210 ) + Additional gas supplied by the venturi tube 220]. Here, the amount of the mixed gas of the combustion gas and the additional gas discharged from the Coanda nozzle 210 with respect to the amount of the combustion gas sucked in the Coanda nozzle 210 may be 5 to 20 times. Also, the amount of the combustion gas to be introduced through the Coanda nozzle 210 and the Venturi tube 220 with respect to the amount of the combustion gas sucked in the Coanda nozzle 210 is set to be 50 to 100 times the amount of the mixed gas of the combustion gas and the additional gas .

[Second Embodiment of Dispensing Section]

In the first embodiment of the jetting unit 200, the jetting unit 200 includes the Coanda nozzle 210 and the single Venturi tube 220, whereas the second part 200 of the jetting unit 200 In an embodiment, the jetting unit 200 comprises the Coanda nozzle 210 and the plurality of venturi tubes 220. Fig. 7 shows a cross-sectional view of the second embodiment of the dispensing part.

In the second embodiment of the jetting unit 200, the configuration of the Coanda nozzle 210 and the first venturi tube 220 is the same as that of the Coanda nozzle 210 and (single) Is the same as the configuration of the venturi tube 220, and a description thereof will be omitted. In the second embodiment, a plurality of the venturi tubes 220 are provided, and they form a serial connection in sequence.

More specifically, it is as follows. In the embodiment shown in FIG. 7, the Venturi tube is serially connected in series with the first, second, and third venturi tubes 220A, 220B, and 220C. At this time, the inlet portion of the first venturi tube 220A is connected to the discharge portion 214 of the Coanda nozzle 210 with a gap, and the gap forms the first additional gas portion supply path, Additional gas is additionally supplied. In addition, the inlet of the second venturi tube 220B is connected to the discharge portion of the first venturi tube 220A with a gap, and the gap forms the second additional gas portion supply path, Is supplied. Likewise, the inlet of the third venturi tube 220C is connected to the discharge port of the second venturi tube 220B with a gap, and the gap forms the third additional gas supply path, Is supplied.

In this way, when the venturi tube 220 is provided with N pieces (N is a natural number of 2 or more), the inflow of the first venturi tube 220 into the discharge portion 214 of the Coanda nozzle 210 The inlet 221 of the n-th venturi tube 220 is connected to the outlet 222 of the n-1 venturi tube 220 with a gap 2, ..., N), the amount of additional gas to be supplied can be further increased.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

100: Gasification device for organic material 110: Gasification furnace
120: combustion chamber 130: storage tank
200:
210: Koanda nozzle 211: outer body
212: inner body 213:
214: discharging portion 215:
216: additional gas inlet 216a: additional gas inlet
217: additional gas supply path 218:
218a: handle
220: Venturi tube 221: Inflow part
221a: additional gas addition supply path
222: discharging portion 223:

Claims (11)

An apparatus for gasification of an organic material which is supplied with an organic material waste and injects an oxidizing agent to cause a pyrolysis gasification reaction to produce a gaseous fuel,
A gasification furnace into which waste and an oxidizer are introduced and pyrolysis gasification reaction occurs;
A combustion chamber for receiving a combustible gas discharged from the gasification furnace and burning the combustible gas to generate a combustion gas;
A spraying unit for mixing a combustion gas and an additional gas discharged from the combustion chamber and supplying the mixed gas to the gasification furnace as an oxidizing agent;
Wherein the gasification device comprises:
The apparatus according to claim 1,
And a mixed discharge device for injecting the combustion gas into the main path and introducing the additional gas into the auxiliary path to mix and discharge the combustion gas and the additional gas,
At least one Coanda nozzle,
At least one Venturi tube,
At least one Coanda nozzle, and at least one Venturi tube are sequentially combined.
The method according to claim 2,
Wherein the gas is compressed air or a combustion gas.
The gasification apparatus according to claim 2,
Wherein the injecting portion is composed of a combined body in which a Coanda nozzle and at least one Venturi tube are sequentially coupled,
When a single Venturi tube is provided, the inlet part of a single Venturi tube is connected to a discharge part of the Coanda nozzle with a gap,
When the Venturi tube is provided with N (N is a natural number of 2 or more), the inlet part of the first Venturi tube is connected to the discharge part of the Coanda nozzle with a gap, (N is 2, ..., N) connected in series with the inlet of the n-th venturi tube.
The gasification apparatus according to claim 4,
Wherein the amount of the combustion gas and the mixed gas discharged from the Coanda nozzle is 5 to 20 times the amount of the combustion gas sucked from the Coanda nozzle.
6. The apparatus according to claim 5,
Wherein the amount of the combustion gas is 50 to 100 times the amount of the mixed gas of the combustion gas and the additional gas discharged through the Coanda nozzle and the Venturi tube with respect to the amount of the combustion gas sucked in the Coanda nozzle. Device.
[3] The apparatus of claim 2,
An outer body and an inner body,
A discharge port for discharging the gas to the outside is formed at one end of the double pipe, a suction part for sucking the gas from the outside at one end of the double pipe, and a discharge port for discharging the gas to the outside is formed, And is tapered to be larger,
Wherein the space between the two tubes forms an additional gas inlet which is sealed at one end and the other end and through which the additional gas flows through the additional gas inlet pipe and the additional gas inlet and the flow passage are provided on the side of the above- And the additional gas supply passage is formed in a direction inclined toward the discharge portion side, and the additional gas supply passage is formed in a direction inclined toward the discharge portion side,
Wherein the additional gas is injected through the additional gas supply path so that the gas is sucked from the outside through the suction portion by the Coanda effect.
8. The method of claim 7,
Wherein the outer body and the inner body are coupled to each other by a screw-
And the gap size of the additional gas supply path is adjusted by rotation of the threaded portion.
The venturi tube according to claim 2,
And an inclined portion formed in the shape of a tube and having a diameter smaller than that of the inflow portion, the discharge portion for discharging the gas, and the inclined portion for connecting the inflow portion and the discharge portion. Gasification apparatus for organic substances.
The gasification apparatus according to claim 1,
The waste is introduced at the top of the gasification furnace, and the oxidizing agent is introduced at the bottom of the gasification furnace and flows upward,
Wherein the waste is fed from the upper part of the gasification furnace and the oxidizing agent is also injected from the upper part of the gasification furnace and directed downward.
The gasification apparatus according to claim 1,
A storage tank for receiving and storing the combustible gas discharged from the gasification furnace;
Further comprising a gasification unit for gasifying the organic material.

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