KR100716581B1 - A Orimulsion Burner and the Orimulsion Fuel Supply Method for the Burner - Google Patents

Abstract

The present invention relates to a burner device for an emulsion and a fuel supply method for the burner device.

Orientation fuel is used as a fuel by atomizing the air and fuel at the same mixing ratio of the oil, since the properties of the fuel contains solid particles different from the oil, the burner device used in the present invention is mixed with the injection medium and the oil inside the atomizer After atomization, it is sprayed through the nozzle to improve atomization, and fuel with fine spray particles actively mixes air and fuel even in an atmosphere of excess fuel, minimizes the reformation of nitrogen oxides, and unburned tertiary air due to multi-stage combustion. It is characterized by minimizing the generation of unburnt by making the mixed combustion completely after the flame.

Orientation, Burner, Fuel, Supply, Atomization

Description

A Orimulsion Burner and the Orimulsion Fuel Supply Method for the Burner}

1 is a cross-sectional view showing a preferred example of the combustion burner device according to the present invention,

2 is a system diagram for explaining a fuel supply method according to the present invention;

Figure 3 is a photograph showing a state in which the emulsion maintenance state is changed for each preheating temperature by the fuel supply method of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: guide pipe, 2: nozzle cap,

3: nozzle body, 4: mixer,

6: mixer sleeve, 7: steam / fuel outlet

20: diffusion space, 22: nozzle hole,

30,52: through flow path, 30a: focused flow path,

30b: straight flow path, 32, 34: front and rear stoppers,

40: mixer body, 40a, 48a: euro,

42: primary venturi member, 44: secondary venturi member,

46: front projection, 48: rear projection,

50: large diameter portion, 50a: venturi euro,

54: fastener, 56: diffusion space,

58: mixed space, 60, 62: step,

64, 66: threads, 70, 72: inner and outer pipe members,

74: steam supply line, 76: fuel supply line,

80: fuel tank 82: pump,

84: fuel heater, 86: compressor,

88: blower, 90: air supply line,

92: combustion chamber, 94: boiler section,

96: year, 100: burner device

The present invention relates to a burner device for an emulsion and a fuel supply method for the burner device, in particular, the combustion performance of the emulsion fuel in the form of emulsion when the fuel is used as an emulsion in an industrial or power generation boiler using heavy oil It relates to a burner device and a fuel supply method to improve the.

In general, oral emulsion is steamed and diluent added to natural bitumen and is similar to petroleum drilling. It is brought up to the ground, and dehydration, desalination and gas removal are performed in oil refinery. It refers to the fuel in the emulsion state mixed at a rate of 30%.

In addition, in the case of an orientation, when analyzing the element by weight ratio as a component, it is 58.07 weight% of carbon, 10.06 weight% of hydrogen, 0.26 weight% of nitrogen, 28.78 weight% of oxygen, and 2.83 weight% of sulfur components. In the industrial analysis, the water content is 29.16% by weight, the volatile content is 68.04%, the ash content is 0.45% by weight, and the fixed carbon is 2.35% by weight, and the calorific value is 7,340 kcal / kg.

On the other hand, in the case of high-sulfur heavy oil, as a constituent, the elements are analyzed by weight ratio of 87.43 wt% carbon, 7.20 wt% hydrogen, 0.10 wt% nitrogen, 3.49 wt% oxygen, and 1.57 wt% sulfur component. It is composed of%, industrially analyzed by 0.41% by weight of water, 95.58% of volatile content, 0.21% by weight of ash, 3.84% by weight of fixed carbon, the calorific value is 10,370 kcal / kg.

Therefore, in the case of an emulsion, moisture evaporation occurs first in combustion, and then, as the temperature rises, volatiles in the emulsion are released, leading to ignition, and thus the ignition time of the emulsion is higher than that of a single bitumen particle. In the case of char combustion after the volatiles of the emulsion droplets are increased, the overall combustion time is natural due to the combustion promotion effect by the water gasification reaction or the specific surface area of the char produced, compared to the particles of natural bitumen. Shorter than that of bitumen alone.

In addition, when the orientation is sprayed inside from the spray burner, heat is generated from the flame and heated by mixing with the hot combustion gas, followed by moisture drying, volatile emission, and ignition. The complexed orientation is combusted with mixing with secondary air, released from coal particles with natural bitumen, and forms a volatile combustion zone. The char remaining at the rear end of the volatile combustion zone forms a char combustion zone that is mixed with the auxiliary air and combusts, and large particles are transferred to the combustion chamber outlet before combustion is completed and It acts as the main cause.

Therefore, in order to form a stable flame, an undifferentiated method for early evaporation of water or a special flame protection method for circulating high-temperature combustion gas to the ignition part must be created in a manner different from that of a burner using heavy oil. In other words, the burner for burning the orientation fuel is because the fuel properties of the fuel contains solid or oil particles different from the oil, the life of the difference, unburned dust and burner tip is a problem.

In the prior art, a burner having an air or steam atomizer type is simply configured to allow fuel and steam to flow in, and to be mixed with each other in the final stage, so that mixing is difficult but evenly mixed and atomized. As the degree falls, a large amount of nitrogen oxides are generated after combustion, and the generation of unburned dust increases, which causes problems of infiltration due to incomplete combustion.

The present invention has been made with the following objectives in order to solve such a conventional problem.

The main object of the present invention is that the internal mixture is inert when an atomized fuel is atomized by equalizing the ratio of air and fuel with the same fuel using an air or steam atomizer. In this case, the drop size increases in the order of the most excellent and intermediate mixed type and the external mixed type, and based on this, the pressure loss and abrasion degree in the burner increase in the internal mixed type, so It is to improve the combustion performance by reflecting on the design.

Another object of the present invention is to preheat the tank at the time of supplying the emulsion fuel to maintain a predetermined temperature and supply it to the burner so that the temperature just before combustion is maintained to maintain the optimum state temperature for combustion while shear stress in the combustion burner Internal abrasion is minimized by the separation of the emulsion and pressure loss, and atomization becomes more efficient and complete combustion in the combustion chamber can be induced to reduce the generation of unburned dust and to control the nitrogen ratio by controlling the air ratio. It is intended to be.

In order to achieve the above objects, the present invention provides a mixture of steam and fuel at the same time to supply the mixture in an appropriate state inside the atomizer, and the nozzle cap is coupled to the tip position as the inside of the guide pipe so as to combust it in the combustion chamber. A nozzle body is installed, and a mixer is coupled to the nozzle body by a mixer sleeve at a rear portion of the nozzle body, and the mixer and the mixer sleeve are coupled to a steam / fuel supply port at a rear side of the guide pipe. In the conventional burner device, the nozzle cap is screwed to the front end of the nozzle body, the diffusion space is formed inside and a plurality of nozzle holes are provided to enable even diffusion of the fuel is provided, The nozzle body is formed with a front stopper and a rear stopper on the outside, respectively. The nozzle cap is screwed to the front of the room stopper, and the mixer sleeve, which will be described later, is screwed to the rear of the rear stopper, and the fuel in the mixed state is concentrated by connecting the focusing channel and the straight channel. A through flow path is formed, and the mixer is provided with a primary venturi member at the rear of the mixer body and a secondary venturi member at the front, and the mixer body and the first and second venturi members are mounted on the mixer sleeve. It is made to be coupled to the nozzle body by the step, the mixer sleeve is formed with a stepped in the inside, respectively, the threaded portion is formed in the front and rear, respectively, the stepped in the state that the large diameter portion of the primary venturi member is fitted to each other The additional nozzle body is screwed together and the threaded portion is screwed together with the steam / fuel supply. The steam / fuel supply port is coupled to the inner and outer pipe members having different diameters in the form of a double pipe, the inner pipe member is located on the outside of the front projection located in the primary venturi member of the mixer The outer pipe member is screwed to the mixer sleeve and screwed to each other, the space between the inner and outer pipe members is utilized as a steam supply line and the inner space of the inner pipe member is utilized as an oil supply line. Provided is a burner device for an emulsion.

In addition, when the fuel is supplied and burned in the burner and the boiler is heated using heat generated by the combustion of the fuel, and the combustion system generated after combustion is purified and then discharged to the outside, A fuel heating step of heating the emulsion fuel in the fuel tank; A preheating step of feeding the heated orientation fuel to the burner device via the feeding line, but maintaining the predetermined temperature so that the temperature of the fuel does not drop significantly in the middle of the feeding line; And it provides a fuel supply method comprising a suitable fuel supply step of supplying in a state in which the temperature immediately before the injection supply is maintained in a state of maintaining a proper temperature is suitable for combustion.

In addition, it provides a fuel supply method comprising a suitable fuel supply step to maintain the temperature of the fuel 60 ℃ in the fuel heating step, the temperature of the fuel 50 ℃ in the appropriate fuel supply step.

Hereinafter, with reference to the accompanying drawings will be described in more detail with reference to a preferred example of the device of the present invention.

As illustrated in FIGS. 1 to 3, first, the burner device of the present invention will be described in more detail. In general, steam and fuel may be simultaneously supplied and supplied in a state in which the atomizer is mixed in an appropriate state and burned in the combustion chamber. In the conventional burner apparatus, the nozzle body 3 having the nozzle cap 2 coupled to the inside of the guide pipe 1 is provided, and the mixer 4 is provided at the rear of the nozzle body 3. ) Is installed in combination with the nozzle body 3 by a mixer sleeve 6, and the mixer 4 and the mixer sleeve 6 are inside the guide pipe 1 at the rear of the steam / fuel supply port ( 7) is made in combination with the installation.

In this case, the nozzle cap 2 is screwed to the front end of the nozzle body 3, the diffusion space 20 is formed on the inside and a plurality of nozzle holes 22 is provided to provide even diffusion of fuel. This is made possible.

Next, the nozzle body 3 is formed with a front stopper 32 and a rear stopper 34 on the outside, and the nozzle cap 2 is screwed to the front of the front stopper 32, and the rear stopper 34 The mixer sleeve 6, which will be described later, is formed to be screwed on the rear side, and the through-flow passage 30 in which the fuel in the mixed state is focused by being connected to the focusing passage 30a and the straight passage 30b is formed. do.

Next, the mixer 4 has a primary venturi member 42 at the rear of the mixer main body 40 and a secondary venturi member 44 at the front of the mixer main body 40, and these mixer main bodies 40, 1, Secondary venturi members 42 and 44 are coupled to the nozzle body 3 by a mixer sleeve 6.

In this case, the mixer body 40 is formed by a plurality of passages 40a formed inside, and the primary venturi member 42 has front and rear protrusions 46 and 48 and these front and rear protrusions ( The large diameter portion 50 positioned between the 46 and 48 is integrally formed, but a through flow passage 52 is formed at the center and a plurality of flow paths 48a are formed radially at the rear protrusion 48. The diameter portion 50 is formed by a plurality of venturi flow path (50a) having a step is formed in a double, the secondary venturi member 44 is fitted to a part of the focusing flow path (30a) of the nozzle body (3). The outer side of the mixer body 40 is formed in a tapered shape so that the flow path 44a is formed in a converging direction so as to be connected to each other and coincided with the flow path 40a of the mixer body 40, and the mixer body is formed by a fastener 54. 40 and fixedly coupled to each other, the nozzle body (3) by the mixer sleeve (6) When combined, a diffusion space 56 is formed outside the front protrusion 46 and a mixing space 58 is formed outside the rear protrusion 48 so that the mixing space 58 has a flow path 48a and a venturi flow path. The 50a and the flow passage 40a are formed in a shared space in communication with each other.

Next, the mixer sleeve 6 has stepped portions 60 and 62 formed therein, and threaded portions 64 and 66 formed respectively at the front and rear portions thereof. The stepped portion 60 of the primary venturi member 42 is formed. The threaded portion 64 is screwed together with the nozzle body 3 in a state where the large diameter portion 50 is fitted to each other, and the threaded portion 66 is screwed with the steam / fuel supply portion 7. The configuration is made to build.

The steam / fuel supply port 7 couples inner and outer pipe members 70 and 72 having different diameters in the form of a double pipe, and the inner pipe member 70 is the primary venturi member of the mixer 4. The outer pipe member 72 is fitted to the outside of the front protrusion 46 located in the 42 and the outer pipe member 72 is screwed to the mixer sleeve 6 is coupled to each other, the inner and outer pipe members (70, 72) The space between is used as the steam supply line 74 and the inner space of the inner pipe member 72 is made to be utilized as the oil supply line 76.

Next, the configuration including the burner device 100 made as above will be described.

The fuel supply line 76 which supplies the fuel to the burner device 100 while maintaining a proper temperature through the pump 82 from the fuel tank 80 and through the fuel heater 84 to the burner device 100. And a steam supply line 74 for supplying steam to the burner device 100 by the compressor 86 and an air supply for supplying combustion air by the blower 88 during the combustion operation of the burner device 100. Lines 90 are connected to each other, and the boiler section 94 which utilizes the heat obtained by the combustion of the fuel in the combustion chamber 92 in which the burner device 100 is coupled and is installed in combination with the combustion chamber 92 and In addition, the system is configured in such a way that the flue 96 connected to the boiler unit 94 and the exhaust gas purifying means are connected to each other.

Reference numeral 98 as an unexplained symbol denotes a continuous radiation monitor and a data capture system in the boiler section 94.

At this time, a process of supplying fuel to the burner device as a process to be made will be described with reference to the present inventors supply method.

In other words, the supply is made while sequentially going through the following steps, the fuel heating step of heating the emulsion fuel in the fuel tank (80); The heated orientation fuel is fed to the burner device 100 via the fuel supply line 76 but the fuel heater 84 is maintained in order to maintain a predetermined temperature without lowering the temperature of the fuel in the middle of the fuel supply line 76. Preheating step to preheat; And it is to pass through the appropriate fuel supply step of supplying in a state in which the temperature immediately before the injection supply from the burner device 100 in an appropriate state to burn in a state of maintaining the proper temperature.

At this time, it is preferable to have the step of maintaining the temperature of the fuel 60 ℃ in the fuel heating step, and the temperature of the fuel 50 ℃ in the appropriate fuel supply step.

Let's take a closer look.

First, the burner device 100 is supplied with fuel, steam, and air, which maintain proper states, through the fuel supply line 76, the steam supply line 74, and the air supply line 90, respectively. When supplied, steam and fuel reach the steam / fuel supply port 7 via the steam supply line 74 and the fuel supply line 76, respectively.

First, the steam is diffused from the steam supply line 76 in the diffusion space 56 which is located outside the front protrusion 46 of the mixer 4 and behind the large diameter portion 50, and the large diameter portion 50 It reaches the mixing space 58 located in front of the large diameter part 50 as the outer side of the rear protrusion part 48 through the venturi flow path 50a formed in the inside.

Next, the orientation fuel is supplied from the fuel supply line 76 while maintaining the proper temperature, and passes through the radial flow path 48a formed in the rear projection 48 via the through flow path 52 of the mixer 4. After reaching the mixing space 58 is reached.

As such, the steam and the fuel reaching the mixing space 58 are mixed with each other in different directions of diffusion, and thus, the flow path 40a of the mixer body 40 is mixed with the steam and the fuel. The mixture is diffused and mixed while passing through the flow path 44a of the secondary venturi member 44, and then again in the diffusion space 20 of the nozzle cap 2 via the focusing flow path 30a and the straight flow path 30b of the nozzle body 3. It is sprayed and supplied through the nozzle hole 22 in the state of more evenly mixed in the state of diffusion mixing to improve the degree of atomization, so that the fuel of fine spray particles can mix the steam, fuel and air even in the atmosphere of k fuel excess. In order to minimize the reformation of nitrogen oxides, the unburnt due to the multi-stage combustion was mixed with air in the third stage and completely burned to minimize the occurrence of unburnt.

In the case of an emulsion used as a fuel, each state ranging from room temperature to 40 ° C., 50 ° C., and 75 is shown. When the temperature is low or high based on 50 ° C., the emulsion state of the emulsion is destroyed and the combustion state is decreased. It was confirmed that the phenomenon that the incomplete or clogged nozzle hole 22 occurs, and repeated experiments as a result of the fuel tank 80 to maintain 60 ℃ by hot water heating and burner to increase the spray efficiency of the droplets As the front end of the apparatus 100, it was found that the temperature at the point passing through the nozzle hole 22 of the nozzle cap 2 was most preferably maintained at 50 ° C.

As described above, according to the present invention, when the atomization fuel is atomized by equalizing the ratio of air and fuel with the same fuel using an air or steam spray atomizer, It is excellent in chemistry and reflects it in the fuel mixing method and the design of the nozzle, which makes it possible to further improve the combustion performance, and preheat the fuel tank 80 at the time of supplying the emulsion fuel to maintain a predetermined temperature. It is supplied to the burner to keep the temperature just before combustion is maintained at the optimum state temperature for combustion while minimizing internal abrasion by separation of the emulsion due to shear stress or pressure loss in the combustion burner. To induce complete combustion in the combustion chamber to reduce the generation of unburned dust and to control the air ratio. It is possible to realize a reduction of the nitrogen compound.

Claims (5)

The nozzle body (3) having the nozzle cap (2) coupled to the inner side of the guide pipe (1) to supply steam and fuel at the same time, and to be supplied in a proper state mixed inside the atomizer and combusted in the combustion chamber. ), The mixer 4 is attached to the nozzle body 3 by the mixer sleeve 6 at the rear of the nozzle body 3, and the mixer 4 and the mixer sleeve 6 are In the conventional burner apparatus which is provided in the rear of the guide pipe (1) in combination with the steam / fuel supply port (7), The nozzle cap 2 is screwed to the front end of the nozzle body 3, but is installed in the diffusion space 20 is formed inside and a plurality of nozzle holes 22 is provided to evenly supply the fuel diffusion. Done, The nozzle body 3 has a front stopper 32 and a rear stopper 34 formed on the outside thereof, and the nozzle cap 2 is screwed and installed at the front of the front stopper 32 and the rear of the rear stopper 34. Mixer sleeve (6) is made by screwing is installed, the inside of the mixed fuel is formed through the passage 30 is concentrated by the converging flow path 30a and the straight flow path (30b) is formed , The mixer 4 is provided with a primary venturi member 42 at the rear of the mixer main body 40 and a secondary venturi member 44 at the front of the mixer main body 40, and these mixer main bodies 40, 1,2. The car venturi members 42 and 44 are formed in combination with the nozzle body 3 by the mixer sleeve 6, The mixer sleeve 6 has stepped portions 60 and 62 formed therein and threaded portions 64 and 66 formed in front and rear portions thereof, respectively, so that the primary venturi member 42 has a large size. The threaded portion 64 is screwed to each other with the nozzle body 3 in a state where the diameter 50 is fitted to each other, and the threaded portion 66 is screwed to each other with the steam / fuel supply unit 7. The composition is made, The steam / fuel supply port 7 couples inner and outer pipe members 70 and 72 having different diameters in the form of a double pipe, and the inner pipe member 70 is the primary venturi member of the mixer 4. The outer pipe member 72 is fitted to the outside of the front protrusion 46 located in the 42 and the outer pipe member 72 is screwed to the mixer sleeve 6 is coupled to each other, the inner and outer pipe members (70, 72) An intervening space is utilized as the steam supply line 74 and the inner space of the inner pipe member 72 is utilized as an oil supply line 76, burner device for an orientation. delete The method of claim 1, The mixer body 40 is made of a plurality of passages (40a) formed in a double inside, The primary venturi member 42 is composed of the front and rear protrusions 46 and 48 and the large diameter portion 50 between the front and rear protrusions 46 and 48 are integrally formed. A through flow path 52 is formed at the center, and a plurality of flow paths 48a are radially formed at the rear protrusion 48, and a plurality of venturi flow paths 50a having a step are formed in the large diameter part 50 in a double manner. Done, The secondary venturi member 44 is tapered on the outside so as to be fitted to a part of the focusing passage 30a of the nozzle body 3 so as to coincide with the flow passage 40a of the mixer body 40. A flow path 44a is formed to be connected to be focused so as to be connected to each other and is fixedly coupled to the mixer main body 40 by a fastener 54. When combined with the nozzle body 3 by the mixer sleeve 6, the diffusion space 56 is formed on the outside of the front protrusion 46, and the mixing space 58 is formed on the outside of the rear protrusion 48. Burner device of the orientation, characterized in that the mixing space 58 is formed in the form of a shared space in which the flow path (48a), the venturi flow path (50a) and the flow path (40a) communicate with each other. A fuel heating step of heating the emulsion fuel in the fuel tank 80; The heated orientation fuel is fed to the burner device 100 via the fuel supply line 76 but the fuel heater 84 is maintained in order to maintain a predetermined temperature without lowering the temperature of the fuel in the middle of the fuel supply line 76. Preheating step to preheat; And Fuel in the burner device for an oral emulsion, characterized in that through the appropriate fuel supply step of supplying the temperature immediately before the injection supply from the burner device 100 in a state of maintaining a proper temperature in an appropriate state for combustion. Supply method. The method of claim 4, wherein And the fuel temperature is maintained at 60 ° C. in the fuel heating step, and the temperature of the fuel is maintained at 50 ° C. in the proper fuel supplying step.

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