KR20090002893A - Burner for combustion of h2 gas and biofuel - Google Patents

Abstract

A burner for the hydrogen gas and bio fuel is provided that the environmental contamination can be reduced comparing with the use of the fossil fuel. A burner for the hydrogen gas and bio fuel comprises a housing(11), a fuel nozzle outside is passed through within the housing, outside is connected to the fuel supply pipe (P1), a plurality of hydrogen gas nozzles connected to the hydrogen gas supply pipe (P2) passing through outside within the housing, a ignition plug combined between the in-between through-hole and hydrogen gas nozzle, a blower(15) which is combined after the housing rearward, and sprays the air through the outer ring through-hole from the housing to outside.

Description

Burner for combustion of H2 gas and biofuel

1 is a perspective view of one embodiment of the burner of the present invention.

Figure 2 is a cross-sectional structural view of one embodiment of the burner of the present invention.

3 is a structural diagram of a first embodiment hydrogen gas nozzle constituting the burner of the present invention.

Figure 4 is a structural diagram of a hydrogen gas nozzle of a second embodiment constituting the burner of the present invention.

5 is a structural diagram of a third embodiment hydrogen gas nozzle constituting the burner of the present invention.

Figure 6 is a schematic diagram showing the relationship between the injection angle of each fuel and air of the burner of the present invention.

          ((Explanation of symbols for main part of drawing))

 11. Housing 12. Biofuel Nozzle 13. Hydrogen Gas Nozzle

 14. Spark Plug 15. Blower

 C1. Small Kyungwon C2. Daekyung Won H1. Central through

 H2. Medium through H3. Outer through hole M. manifold

 P1. Biofuel Supply Line P2. Hydrogen gas supply pipe P2 '. Branch pipe

 P2 ".injection pipe P3. Compressed air supply pipe

According to the present invention, a plurality of hydrogen gas nozzles and a plurality of blowing air nozzles are respectively provided along a trajectory of two virtual circles that are concentric with each other around a biofuel nozzle, and simultaneously blows the biofuel into the hydrogen gas flame and blows them. The present invention relates to a burner for hydrogen gas and biofuel, by which air can be injected to improve combustion efficiency of liquid biofuel mixed with water.

The global warming problem is seriously brought about by the mass consumption of fossil fuels along with industrial development. Global warming is caused by carbon dioxide gas generated from the combustion of fossil fuels, and global warming is caused by abnormal climate change and sea level. It has caused a great impact on the production of agriculture and fisheries, and also on the ecosystem by causing rises, changes in the amount of water in the soil, etc.As a sense of crisis on global warming has increased, the Intergovernmental Panel on Climate Change in 1988 ( IPPC) was held.

In addition, the Kyoto Protocol was adopted at the 3rd Conference of the Parties to the Climate Change Convention in Kyoto in 1997. As a result, efforts to reduce greenhouse gas emissions worldwide have been made by countries around the world. It is happening.

In order not to generate greenhouse gas as described above, it is necessary to expand the use of eco-friendly energy such as solar heat, wind power, tidal power, and research on it is active, but there are still many technical difficulties to use eco-friendly energy widely throughout the industry. have.

In addition, although it is not environmentally friendly, but does not emit greenhouse gases, it is the closest energy source to replace fossil fuels under current technology levels, but the opposition to the use of nuclear power is not easy because it is not easy to treat radioactive waste. It is true.

In addition, one of the largest pollution sources among various pollutants emitting greenhouse gases is an automobile, and it is also very urgent to allow the exhaust gas or the greenhouse gas to be discharged or minimized from the automobile. Although researches for using batteries, hydrogen gas, fuel cells, etc. are being actively conducted, it is considered to require more than several years in the future.

However, as crude oil prices have soared recently, interest in biofuels has increased as a way to reduce energy costs and reduce greenhouse gas emissions. The biofuels are as follows.

Biofuel is a renewable energy that is different from fossil fuels from biomass and is often used to refer to bioalcohol and biodiesel. Bioalcohol is extracted from starch crops such as sugar cane, wheat and corn. It is made from bioethanol that can replace gasoline through centrifugation and distillation.

Biodiesel is obtained by heating animal and vegetable oils such as vegetable fats, animal fats and waste cooking oils extracted from soybeans and rapeseeds in a container containing methanol and calcium oxide, which is a basic solid catalyst. Biodiesel is partially used as automobile fuel, and research is being conducted to make it possible to use biofuel as an automobile fuel in the best way with regard to its efficiency, cost, and environmental damage caused by the expansion of cropland.

The biofuel as described above may also serve as a general fuel for heating purposes in addition to automobile fuel. In particular, for example, various vegetable oils and vegetable waste oils such as soybean oil, fluid oil, corn oil and palm oil may be used as water and surfactants. Biofuels mixed with additives, such as, but also can be used as a fuel in a general sense, it is not possible to use a conventional burner, even if used, the combustion efficiency is extremely low, there is a problem that the flame is very unstable.

Particularly, in order to use vegetable oil mixed with water as a fuel, a considerable high temperature of 2000 to 3000 ° C. or higher is required. However, since the above temperature cannot be obtained with a conventional burner, combustion efficiency is very low. Its effect is also lacking.

The present invention has been made to solve the problems of conventional burners that cannot use a biofuel mixed with vegetable oil, and can obtain a flame having a sufficiently high temperature to effectively burn the biofuel. In addition, it is an object of the present invention to provide a burner that can efficiently use biofuel using such a high temperature flame.

The above object of the present invention is achieved by a plurality of hydrogen gas injection nozzles arranged along a trajectory of a circle centered on a biofuel injection nozzle.

The burner for hydrogen gas and biofuel according to the present invention is obtained by burning hydrogen gas to obtain a high temperature flame, and injecting a liquid biofuel containing water into a high temperature hydrogen gas flame obtained during hydrogen gas combustion. There is this.

As described above, the hydrogen gas and the biofuel burner of the present invention are provided with three types of nozzles having different uses, and are characterized by an arrangement structure of the three types of nozzles provided. A plurality of hydrogen gas nozzles and blowing air nozzles are arranged at regular intervals along two imaginary circles which are concentric circles around the fuel nozzles.

That is, the plurality of hydrogen gas nozzles are arranged along the trajectory of the small diameter circle centered on the biofuel nozzle, and the plurality of blower air nozzles are the large diameter circle centered on the biofuel nozzle. It is a structure arranged along the trajectory of.

As described above, the three types of nozzles provided in the burner of the present invention have different roles as described in the names.

The biofuel nozzle is a nozzle for injecting a biofuel mixed with vegetable oil and water.

The hydrogen gas nozzle is for obtaining a relatively thin and short hot hydrogen gas flame by injecting hydrogen gas, and is arranged around the biofuel nozzle.

That is, a hot hydrogen gas flame is generated in front of each hydrogen gas nozzle including the biofuel nozzle, and the biofuel is injected toward the high temperature flame, whereby the water contained in the biofuel rapidly evaporates to explode finely. At the same time, vegetable oil is burned.

Blowing air nozzles are injected toward the combustion flame side of hydrogen from the biofuel nozzle located in the center portion, that is, the combustion flame of the biofuel sprayed into a conical shape whose diameter is gradually increased toward the front thereof from the nozzle of the biofuel is excessively around. It prevents the diffusion and at the same time serves to allow the combustion flame to extend well toward the front of the nozzle while supplying air, that is, oxygen, to the combustion flame.

That is, combustion fuel of biofuel is generated by injecting biofuel toward the hydrogen gas flame formed in front of the hydrogen gas nozzle, and the combustion flame of biofuel is concentrated forward by injecting blowing air into the combustion flame of the biofuel. You can do it.

Details of the effects and the resulting effects, including the object and technical configuration of the present invention will be clearly understood by the following description with reference to the drawings showing a preferred embodiment of the present invention.

Figure 1 is a perspective view of the hydrogen gas and the biofuel burner of the present invention, Figure 2 is a side cross-sectional structural diagram.

As shown the burner for hydrogen gas and biofuel of the present invention,

A plurality of intermediate through holes (H2) and outer through holes (H3) are formed through the trajectories of the virtual small diameter circle (C1) and the large diameter circle (C2), which form concentric circles around the central hole (H1) in the front center, respectively. A housing 11 having a space;

A biofuel nozzle (12) installed inside the housing (11) to coincide with the central through hole (H1) in a horizontal direction and connected to a biofuel supply pipe (P1) passing through the housing (11);

A plurality of hydrogen gas nozzles 13 installed inside the housing 11 to coincide with the intermediate through holes H2 in a horizontal direction, and connected to the hydrogen gas supply pipe P2 penetrating the inside and outside of the housing 11; ;

An ignition plug 14 coupled between the intermediate through-hole H2 and the hydrogen gas nozzle 13;

It is coupled to the rear end of the housing 11, and consists of a blower 15 for injecting air to the outside of the housing 11 through the housing 11 and the outer through hole (H3).

At this time, the air blown into the housing 11 by the blower 15 is injected to the outside of the housing 11 through the outer through hole (H3) of the housing 11, bar from the rear of the housing 11 to the front The bio fuel nozzle 12, the hydrogen gas nozzle 13, the spark plug 14, the bio fuel supply pipe (P1), the hydrogen gas supply pipe (P2), etc. so that the flow of the blowing air is smoothly possible, the housing 11 It must be combined inside.

In addition, each of the fuel supply pipes P1 and P2 is provided with various shutoff valves V, and a control unit for automatically or manually controlling the shutoff valve V, the spark plug 14, the blower 15, and the like. The other essential components and control system including these are well known technologies that must be provided in the burner, and the description thereof will be omitted, and the center structure of the nozzle and the spray angle, which are important features of the present invention, will be described. Let's take a look.

In addition, the compressed air supply pipe (P3) is connected to the hydrogen gas supply pipe (P2), which is the hydrogen gas remaining in the hydrogen gas supply pipe (P2) and the hydrogen gas nozzle 13 inside the burner housing 11 when the burner is stopped. This is to prevent the risk of a safety accident by discharging to the outside of the burner.

The burner of the present invention as described above is for the efficient combustion of biofuel, that is, vegetable oil mixed with water, and in order to efficiently burn biofuel containing water, a high temperature flame is required. Hydrogen gas nozzles 13 to obtain a flame of the plurality should be arranged around the biofuel nozzle 12 around the center, this structure can be a variety of forms, looking at some examples are as follows.

As shown in FIG. 3, after the manifold M is coupled to the hydrogen gas supply pipe P2, the manifold M and each hydrogen gas nozzle 13 may be connected to the branch pipe P2 ′, respectively. As shown in Fig. 4, the hydrogen gas supply pipe P2 is branched into two or more branch pipes P2 ', and the ends of all the branch pipes P2' are closed-loop, for example, a ring-shaped injection pipe P2. After connecting to "), a plurality of hydrogen gas nozzles 13 may be coupled to the injection pipe P2.

At this time, the injection pipe (P2 "), as shown in Figure 5, in the shape of a ring on the front view, but having a double wall may have the shape of a cylinder having an inner space, other structures other than the above is possible The important point is that a plurality of hydrogen gas nozzles 13 should be arranged around the biofuel nozzles 12 so as to surround the biofuel nozzles 12. Hydrogen gas nozzles are also applicable.

In addition, the plurality of hydrogen gas nozzles 13 are arranged at regular intervals, and the distance between the hydrogen gas nozzles 13 and the biofuel nozzles 12 is also the same for the stable combustion of the biofuel. On the front view, it is preferable that the center angle between the two hydrogen gas nozzles 13 with respect to the biofuel nozzle 12 is 30 ° or less, and when the center angle exceeds 30 °, the distance between the two hydrogen gas nozzles 13 The spacing can be too wide to reduce the biofuel combustion efficiency.

That is, the number of the hydrogen gas nozzles 13 is preferably at least 12, but this may vary depending on the size of the burner, the injection angle of the nozzle, and the like.

As described above, the burner of the present invention has a feature in that a hydrogen gas nozzle is disposed around the biofuel nozzle, and blow air may not be supplied as necessary. In this case, the housing is omitted and the biofuel nozzle and It may consist only of hydrogen gas nozzles and their associated.

However, when it is necessary to supply blown air, a blower having a structure similar to that of the hydrogen gas nozzle 13 coupled to the injection pipe P ″ may be used, which is not the housing type as described above. The injection pipe of air (not shown) becomes a structure which wraps the injection pipe P "for hydrogen gas.

In addition, the fuel injection angle of the nozzle is also an important factor for the stable combustion of the biofuel, as shown in Figure 6, the biofuel is to be injected in a conical shape, the diameter gradually increases toward the front, the fuel is dispersed around It is preferable to make the injection angle (theta) into 40-70 degrees.

As described above, the injection angle of the biofuel is also related to the hydrogen gas injection angle. However, if the injection angle (θ) of the biofuel is less than 40 °, the diffusion density of the biofuel becomes higher than necessary and incomplete combustion is required. If it exceeds 70 °, the diffusion density is too low, which is helpful for complete combustion. However, the horizontal direct injection force of the biofuel decreases and the flame spreads excessively, resulting in reduced concentration of the screen and lowering combustion efficiency.

The injection angle θ 'of hydrogen gas for generating a high temperature flame required for burning the biofuel is inclined with respect to the horizontal direction toward 0 to 30 °, that is, the horizontal direction or the biofuel nozzle side. When the injection angle θ 'is inclined outward from 0 °, the contact distance with the biofuel becomes longer and the contact efficiency of the hydrogen gas, that is, the hydrogen gas flame and the biofuel decreases.

In addition, when it is excessively inclined toward the biofuel nozzles in excess of 30 °, the combustion efficiency is lowered as the hydrogen gas flame contacts the biofuel before the biofuel is diffused to an appropriate density.

In order to supply the oxygen to the biofuel flame and to advance the flame more effectively toward the front, the blowing angle θ ″ of the blowing air injected outside the housing through the outer through hole H3 is 0 to 30 °, that is, the horizontal direction or the It is preferable to incline toward the front outer side opposite the biofuel nozzle.

In this case, the injection angle of the blowing air is limited as described above, when the injection angle θ ″ is inclined toward the inner side, that is, the biofuel nozzle side, to reduce the combustion efficiency while reducing the injection force of the biofuel. If the inclination exceeds 30 ° toward the outside, it is not possible to give the biofuel flame an appropriate blowing pressure and the straightness of the biofuel flame falls.

In addition, the burner of the present invention, which can efficiently burn water-containing biofuels that are difficult to burn directly using hydrogen gas, may not necessarily be used only for biofuels.

That is, it is possible to use in all cases of burning fuel that is relatively inexpensive but has difficulty in direct combustion by using fuel which is relatively easy to burn.

As described above, the hydrogen gas and the biofuel burner of the present invention can efficiently burn a low-cost biofuel mixed with water, thereby reducing fuel costs, and compared to using fossil fuels. There is an advantage that can reduce environmental pollution.

Claims (5)

A biofuel nozzle 12 connected to the biofuel supply pipe P1; It is connected to the hydrogen gas supply pipe (P2), and comprises a plurality of hydrogen gas nozzles 13 arranged along an imaginary circle around the biofuel nozzle 12 for hydrogen gas and biofuel burner. A housing 11 having a plurality of intermediate through holes H2 and outer through holes H3 along the virtual small diameter circle C1 and the large diameter circle C2 centered on the front center hole H1; A biofuel nozzle (12) installed in the housing (11) to coincide with the central through hole (H1) and connected to the biofuel supply pipe (P1) passing through the housing (11); A plurality of hydrogen gas nozzles (13) installed in the housing (11) to coincide with the intermediate through hole (H2) and connected to the hydrogen gas supply pipe (P2) passing through the housing (11); An ignition plug 14 coupled between the intermediate through-hole H2 and the hydrogen gas nozzle 13; The burner is coupled to the rear end of the housing 11 and comprises a blower 15 for injecting air to the outside of the housing 11 through the outer through hole (H3). The burner for hydrogen gas and biofuel according to claim 1 or 2, wherein the hydrogen gas supply pipe (P2) is connected to a compressed air supply pipe (P3). The fuel injection angle θ of the biofuel nozzle 12 is 40 to 70 °. The injection angle θ 'of the hydrogen gas nozzle 13 is Burner for hydrogen gas and biofuel, characterized in that inclined 30 ° to the horizontal direction toward the horizontal direction or biofuel nozzle side. The blowing angle θ ″ of the blowing air through the outer through hole H3 is defined by claim 2. Burner for hydrogen gas and biofuel characterized in that inclined 30 ° to the horizontal direction toward the front outside of the horizontal direction or opposite the biofuel nozzle.

Images