KR20190012994A - Partially Premixed Annular Rich-Lean Jet Oxygen-enriched Burner - Google Patents

Abstract

The present invention relates to a rich-lean pre-mixed fuel industrial gas combustor and an operating method thereof. In particular, a rich-lean pre-mixed fuel industrial gas combustor is characterized by including: an oxidizing agent supply chamber in which an oxidizing agent is supplied, and which is provided with an output terminal with one side opened; a spray block having a fuel chamber organized so as to surround the output terminal of the oxidizing agent supply chamber, and provided at the center of the inside thereof to be supplied with fuel, and a plurality of spray channels, wherein an oxidizing agent of the oxidizing agent supply chamber is flowed in through an entry terminal so as to mix the fuel and the oxidizing agent to spray the same; and an orifice for spraying fuel which is provided between the fuel chamber of the spray block and each of the spray channels so as to allow the fuel within the fuel chamber to be sprayed to the spray channels.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a gas-fired burner,

The present invention relates to a fuel rich lean-premix type industrial gas burner and an operation method thereof, and more particularly to a gas burner for a fuel rich lean-premix type industrial combustor, and more particularly, Fuel lean premixed industrial gas combustor having a simple structure and consistency of control, and a method of operating the same.

2. Description of the Related Art Generally, combustors are widely used in various fields such as thermal power plants, waste treatment furnaces, gasification furnaces, reformers for fuel cells, heaters, and gas turbines.

Recently, high efficiency and low pollution combustion, which is a combustion system, are indispensable because of energy exhaustion problem and environmental problems. To realize this, researches on the improvement of burner performance and combustion control research for improvement of operation method are actively carried out.

Conventional low-pollution combustion techniques include fuel multi-stage technology, air multi-stage technology, combustion gas recirculation technology, combustion gas internal recirculation technology, re-combustion technology, OFA technique. However, such a burning technique requires additional external devices or a complicated configuration of peripheral devices, and has a disadvantage that there is a limit for low-pollution. Therefore, in order to overcome the above-mentioned disadvantages, a combustion technique for integrally optimizing a plurality of low-pollution combustion techniques has been researched / developed.

[0003] Conventionally, in a burner (prior art 1), as shown in Fig. 1, in a burner in which MILD combustion takes place, a burner is used to suck recirculated flue gas directly from a combustion chamber A system for direct injection of fuel into the recycle flue gas with or without flue gas, a system for direct injection of fuel into the region around the outlet of the flue gas emitter, Describes the formation of a mixture of fuel-recirculated flue gas-combusting agent in the combustion chamber and subsequent introduction of this mixture into the combustion chamber.

As shown in FIG. 2, the prior art 2 includes at least one combustion nozzle, a combustion nozzle guide provided at the upper end of the combustion nozzle, an end provided at the upper end of the combustion nozzle guide, Wherein the cap comprises a cover, a premix nozzle into which each of the combustion nozzles is inserted, a tube plate including the premix nozzle opening, and a cap surrounding the outer circumference of the tube plate, wherein the cap is a porous plate, .

In addition, since the flame is formed by optimizing the split flame technology, the air multi-stage technology, the fuel part premixing technology, and the fuel gas recirculation technology, the patent 10-1738946 (prior art 3) . As shown in FIG. 3, the conventional ultra-low-pollution combustor includes a flame generator for combusting mixed fuel and air to generate a first flame; And a multistage air supply portion into which a part of the flame generating portion is drawn and supplies combustion gas or air to a region of the second flame in the combustion chamber.

In addition, Japanese Laid-Open Patent Publication No. 10-2017-0047869 relates to a combustor (Prior Art 4), and as shown in Fig. 4, is constructed in a multi-stage combustion system to produce a rich burn and a lean burn the lean burn is selectively performed to improve the mixing characteristics to reduce the generation of pollutants including NOx and to eliminate the need for a separate structure for exhaust gas recirculation (FGR) So that pollutants such as NOx can be further reduced as compared with existing combustion systems, and at the same time, the combustion chamber of one of the at least two combustion chambers is formed into a venturi shape, The present invention relates to an ultra low NOx combustor using multi-stage combustion, which is configured to improve the mixing characteristics and ease of application by improving the structure of the combustor.

However, in the case of an industrial combustor having a conventional direct powder for fuel and oxidizer or a coaxial nozzle structure, the mixing characteristics of the fuel and the oxidizer are determined with respect to the operation combustion load (fuel amount) and the air ratio (air amount) There is a problem that a separate control device for controlling the position of the injection nozzle, the injection angle, or the injection momentum of each nozzle is required.

Also, since the combustion characteristics of the fuel and the oxidizer are determined with respect to the operating combustion load (fuel amount) and the air ratio (air amount), an industrial gas burner using a swirling vane (vane generation vane) In order to control the mixing characteristics, a control device for the angle of the swirls or the axial position (injection position) of the fuel injection pipe is required. Therefore, the conventional industrial combustor is disadvantageous in that the combustion characteristic control operation range is very limited.

Therefore, it is required to develop an industrial gas combustor which can control the combustion characteristic (flame shape / low NOx) even under a constant combustion load and air ratio operating conditions in terms of economical efficiency and efficiency, and has simplicity of structure and control consistency.

Korean Patent Publication No. 10-2016-0144975 Korean Patent Publication No. 10-2017-0003052 Korean Patent No. 10-1738946 Korean Patent Publication No. 10-2017-0047869

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is therefore an object of the present invention to provide a method for controlling combustion characteristics (flame shape / emission) under a constant combustion load and air ratio operating conditions, And an object of the present invention is to provide an industrial gas combustor capable of forming a fuel rich / lean multi-stage premixed gas in the circumferential direction of the combustor outlet at the air ratio operating condition.

According to an embodiment of the present invention, the shape of the flame and the temperature of the flame can be controlled by additionally injecting oxygen as an oxidizing agent to adjust the spatial oxygen concentration, and an oxidant supply chamber having a throttling portion and a plurality of injection channels (linear or spiral) A plurality of fuel injection orifices are formed in the injection channel so as to form orifices for injecting fuel into the injection channels, and the fuel injection orifice diameter, cross-section, shape, and number of fuel injections for each injection channel are varied, And to provide a fuel rich and lean premixed industrial gas combustor capable of ensuring the circumferential multi-stage pre-mixing effect and characteristics in the injection block discharge end by the pre-mix injection.

According to an embodiment of the present invention, it is possible to prevent the backflow of the fuel-rich and lean mixture gas in the combustor by the flow rate in the throttling portion and the injection channel, The present invention relates to a fuel rich, lean-premixed industrial gas combustor capable of designing a distribution channel of an internal combustion engine,

According to an embodiment of the present invention, the axial position adjustment of the injection block allows the fuel to be injected in a variety of fuel rich-fuel lean mixed gas (air ratio) in the axial direction of the combustor and in the circumferential direction according to the relative position of the fuel distribution orifice in the throttling portion. And a combustible mixer of different concentration or a mixer of the same concentration arbitrarily determined at each injection channel discharge end of the injection block can be supplied / injected (axial and circumferential multistage mixed combustion or fully premixed combustion effect) A fuel-rich lean premixed type industrial gas combustor.

According to an embodiment of the present invention, it is possible to maintain the combustor injection momentum (the total injection momentum through the injection channel is constantly maintained, since the oxidizer and the fuel amount are constant under an arbitrary operating condition), and any combustion load, The object of the present invention is to provide a fuel rich and lean premix type industrial gas combustor capable of realizing optimum combustion characteristics by fine adjustment of the mixing degree because the final mixing characteristics are different according to the structural form of the heating furnace.

According to an embodiment of the present invention, it is possible to apply to various types of industrial furnaces (heating furnaces, calcining furnaces, reaction furnaces) with a low control of low NOx and flame shape (width and length) And to provide a fuel rich lean premixed industrial gas combustor capable of standardizing combustor structure / design (consistency of combustor structure and consistency of operation control).

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

A first object of the present invention is to provide an industrial gas combustor comprising: an oxidant supply chamber provided with an output end to which an oxidant is supplied and an open end is opened; A fuel chamber in which an output end of the oxidant supply chamber is enclosed, a fuel chamber provided at an inner central portion of the fuel chamber to supply fuel, and a plurality of injection channels having a plurality of injection channels in which an oxidant of the oxidant supply chamber flows into the inlet end, block; And a fuel distributing orifice provided between the fuel chamber of the injection block and each of the injection channels and injecting fuel in the fuel chamber into the injection channel. Can be achieved.

The injection channel may be formed as a groove recessed inwardly from the outer surface of the injection block, spaced apart from each other by a predetermined distance in the circumferential direction, and linear or spiral in the longitudinal direction.

The width and height of the injection channel may be different from each other depending on the oxidant design flow rate.

The fuel distribution orifice may be formed between the fuel chamber and the center of the injection channel in the width direction, and the cross-sectional shape may be a circle, an ellipse, or a square.

Further, the fuel distribution orifice may be characterized in that the number, cross-sectional area, and cross-sectional shape of each injection channel are configured differently based on the mixed fuel concentration designed in each injection channel.

A second object of the present invention is to provide a method of operating an industrial gas combustor, comprising the steps of: supplying fuel to a fuel chamber provided in a central portion of an injection block, which is supplied with an oxidant into an oxidant supply chamber and surrounds an output end of the oxidant supply chamber ; A step of introducing an oxidizing agent into the oxidizing agent supply chamber into an inlet end of a plurality of injection channels longitudinally arranged in a straight or spiral shape and spaced apart from each other by a predetermined distance in the circumferential direction, ; Injecting fuel in the fuel chamber into each of the injection channels through a plurality of fuel distribution orifices provided between a fuel chamber of the injection block and each of the injection channels to mix fuel and oxidizer; And a step of mixing the fuel and the oxidizer with each other through the outlet end of each of the fuel injection channels, and a method of operating the fuel rich leach premixed industrial gas combustor.

The fuel distribution orifice is formed between the fuel chamber and the center of the width direction of the injection channel, and the cross-sectional shape is circular, elliptical, or square, and is mixed with the designed fuel concentration in each injection channel And the number, the cross-sectional area, and the cross-sectional shape in each injection channel are different.

A third object of the present invention is to provide an industrial gas combustor including an oxidizer chamber to which an oxidant is supplied to the inside, an output end having one side open and an inside diameter smaller than that of the chamber, An oxidant supply chamber provided with a throttling portion to be reduced; A fuel chamber in which an output end of the oxidant supply chamber is enclosed, a fuel chamber provided at an inner central portion of the fuel chamber and supplied with fuel, an inlet end, and an oxidant inlet of the oxidant supply chamber, A plurality of injection channels arranged in a circumferential direction spaced apart from each other in a circumferential direction and formed in a linear or spiral shape in a longitudinal direction and different in width and height according to an oxidant design flow rate; A fuel supply pipe penetrating the other side of the oxidant chamber and having one end coupled detachably with the fuel chamber of the injection block; And a fuel distribution orifice of a gas combustor provided between the fuel chamber of each injection block and each of the injection channels and injecting fuel in the fuel chamber into the injection channel. Can be achieved as a gas combustor.

The position of the outlet end of the throttle portion may be located at a certain distance from the discharge end of the injection block toward the upstream side on the basis of the flow direction.

In addition, the length and the inclination angle of the throttle portion are determined according to the variation range of the mixing characteristic design of the fuel and the oxidizer.

The fuel distribution orifice is formed between the fuel chamber and the center of the width direction of the injection channel, the cross-sectional shape of the fuel distribution orifice is circular, elliptical, or square, and based on the mixed fuel concentration designed in each injection channel, And the number, the cross-sectional area, and the cross-sectional shape in each injection channel are different.

The apparatus may further include moving means for moving the injection block in the longitudinal direction to adjust the relative position of the injection block in the axial direction in the axis portion.

The movement means adjusts the relative position in the axial direction of the injection block to change the circumferential fuel and oxidant mixing characteristics in the throttle portion.

The apparatus may further include an oxygen supply nozzle provided coaxially inside the fuel supply pipe and injecting oxygen through the injection block.

A fourth object of the present invention is to provide an operation method of an industrial gas combustor, in which an oxidant is supplied into an oxidant chamber of an oxidant supply chamber, and a fuel chamber provided in a central portion of the injection block, ; And a plurality of exhaust ports arranged at predetermined intervals in the circumferential direction and recessed inwardly from the outer surface of the injection block at an intermediate portion between the oxidant chamber and the output end, Introducing an oxidant into the inlet end of the injection channel; Injecting fuel in the fuel chamber into each of the injection channels through a plurality of fuel distribution orifices provided between a fuel chamber of the injection block and each of the injection channels to mix fuel and oxidizer; And a fuel injector for injecting a fuel and an oxidant through an outlet end of each injection channel, wherein the fuel injection orifice is formed between the fuel chamber and the center of the injection channel in the width direction, Wherein the number, the cross-sectional area, and the cross-sectional shape of each injection channel are differently set so as to be mixed with the designed fuel concentration in each injection channel. . ≪ / RTI >

The step of moving the injection block in the longitudinal direction by the moving means and adjusting the relative position of the injection block in the axial direction at the axis portion changes the circumferential fuel and oxidizer mixing characteristics in the axis portion And the like.

The method may further include injecting oxygen through the injection block by an oxygen supply nozzle provided coaxially inside the fuel supply pipe.

According to one embodiment of the present invention, it is possible to control the combustion characteristics (flame shape / emission) at constant combustion load and air ratio operating conditions and to control the fuel rich / lean multi-stage mixed It has a gas-forming effect.

According to an embodiment of the present invention, the shape of the flame and the temperature of the flame can be controlled by additionally injecting oxygen as an oxidizing agent to adjust the spatial oxygen concentration, and an oxidant supply chamber having a throttling portion and a plurality of injection channels (linear or spiral) A plurality of fuel injection orifices are formed in the injection channel so as to form orifices for injecting fuel into the injection channels, and the fuel injection orifice diameter, cross-section, shape, and number of fuel injections for each injection channel are varied, It is possible to secure the mixing effect and characteristics of the circumferential multi-stage pre-mixing at the discharge block discharge end by the pre-mix injection.

According to an embodiment of the present invention, it is possible to prevent the backflow of the fuel-rich and lean mixture gas in the combustor by the flow rate in the throttling portion and the injection channel, The distribution design of the injection channel of the fuel cell has an effect that is possible.

According to an embodiment of the present invention, the axial position adjustment of the injection block allows the fuel to be injected in a variety of fuel rich-fuel lean mixed gas (air ratio) in the axial direction of the combustor and in the circumferential direction according to the relative position of the fuel distribution orifice in the throttling portion. And a combustible mixer of different concentration or a mixer of the same concentration arbitrarily determined at each injection channel discharge end of the injection block can be supplied / injected (axial and circumferential multistage mixed combustion or fully premixed combustion effect) Effect.

According to an embodiment of the present invention, it is possible to maintain the combustor injection momentum (the total injection momentum through the injection channel is constantly maintained, since the oxidizer and the fuel amount are constant under an arbitrary operating condition), and any combustion load, Since the final mixing characteristics are different depending on the structural form of the combustion furnace applied to the mixing condition, it is possible to realize an optimum combustion characteristic by fine adjustment of the mixing degree.

According to an embodiment of the present invention, it is possible to apply to various types of industrial furnaces (heating furnaces, calcining furnaces, reaction furnaces) with a low control of low NOx and flame shape (width and length) ), And has the advantage of standardizing the combustor structure / design (simplicity of combustor structure and consistency of operation control).

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art from the following description It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further understand the technical idea of the invention. And should not be construed as interpreted.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the burner circulation of the burner according to the prior art 1,
Fig. 2 is a schematic view showing a combustor of a gas turbine according to the prior art 2,
3 is a cross-sectional view of a side view of a combustor according to Prior Art 3,
4 is a view schematically showing a specific configuration of an ultra low NOx combustor using multi-stage combustion according to the conventional art 4 and a flow flow in the interior thereof,
5 is a cross-sectional view of a fuel rich and lean premixed industrial gas combustor according to a first embodiment of the present invention,
6 is a sectional view taken along the line AA in Fig. 5,
7A and 7B are cross-sectional views showing the arrangement of the fuel rich (PR) fuel lean (PL) injection channel in the first embodiment,
8 is a sectional view of a fuel rich and lean premixed industrial gas combustor according to a second embodiment of the present invention,
Figs. 9A and 9B are cross-sectional views taken along the line BB of Fig. 8 showing the arrangement of the fuel rich (PR) fuel lean (PL) injection channel in the second embodiment,
10 is a cross-sectional view of a fuel rich and lean premixed industrial gas combustor according to a second embodiment of the present invention in which the injection block is moved by a certain length in the axial direction,
Figs. 11A and 11B show cross-sectional views taken along the line CC of Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

The meaning of the terms described in the present invention should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

Hereinafter, the configuration, function, and operation method of the fuel rich lean premixed industrial gas combustor 100 according to the present invention will be described. First, a description will be given of a fuel rich and lean premixed industrial gas combustor 100 according to a first embodiment of the present invention.

5 is a cross-sectional view of a fuel rich and lean premixed industrial gas combustor 100 according to a first embodiment of the present invention. 6 shows a cross-sectional view along the line A-A in Fig.

5 and 6, the fuel-rich lean-burn type industrial gas combustor 100 according to the first embodiment of the present invention includes an oxidizer supply chamber 10, a spray block 20, a fuel supply line 30 ), A fuel supply orifice 25, and the like.

The oxidizer supply chamber 10 constitutes the housing of the entire industrial gas combustor 100 and comprises the oxidizer chamber 11, the throttling portion 13 and the outlet end 12. An oxidant is supplied into the oxidant chamber 11 through the oxidant supply end 14 and a tubular output end is opened at one side of the oxidant supply chamber 10.

The diameter of the oxidant chamber 11 is made larger than the diameter of the outlet end 12 and between the oxidant chamber 11 and the outlet end 12 a diameter gradually increases in one direction It can be seen that the throttling portion 13 is provided in which the diameter is gradually reduced from the inlet end 13-1 to the outlet end 13-2.

5 and 6, a part of the injection block 20 is configured to surround the output end of the oxidant supply chamber 10 and has a cylindrical shape as a whole.

A fuel chamber 21 is provided at an inner center of the other side of the injection block 20 to supply fuel and a plurality of injection channels 22 formed in the longitudinal direction and spaced apart from each other in the circumferential direction, do. The oxidizing agent in the oxidizing agent supply chamber 10 flows into the inlet end 23 of the injection channel 22 and the fuel and the oxidizing agent are mixed and injected through the discharge end 24 of the injection channel 22.

The fuel supply pipe 30 is passed through the other side of the oxidant chamber 11 and one end of the fuel supply pipe 30 is detachably coupled to the fuel chamber 21 side of the injection block 20 through the mounting end 31. Therefore, the fuel introduced into the other end of the fuel supply pipe 30 is supplied to the fuel chamber 21 of the injection block 20 through the fuel supply pipe 30.

A fuel distribution orifice 25 is provided between the fuel chamber 21 of each injection block 20 and each injection channel 22 so that fuel in the fuel chamber 21 is injected into the injection channel 22 do.

The injection channels 22 are grooves recessed inwardly from the outer surface of the injection block 20, spaced apart from one another in the circumferential direction, and formed in a linear or spiral shape in the longitudinal direction.

In addition, the width and height of each of the plurality of injection channels 22 may be formed differently depending on the oxidant design flow rate.

The fuel distribution orifice 25 is formed between the fuel chamber 21 and the center of the width direction of the injection channel 22, and the cross-sectional shape may be a circle, an ellipse, a square, or the like.

The fuel distributing orifices 25 are formed in such a manner that the number, the cross-sectional area, and the cross-sectional shape in each injection channel 22 are different from each other, based on the mixed fuel concentration (fuel rich and fuel lean) designed in each of the injection channels 22 Lt; / RTI >

FIGS. 7A and 7B show cross-sectional views showing the arrangement of the fuel rich (PR) fuel lean (PL) injection channel 22 in the first embodiment. 7A and 7B, the diameter of the fuel distribution orifice 25 between the fuel injection channel 22 and the fuel chamber 21 is smaller than the diameter of the fuel-lean injection channel 22 and the fuel chamber 21 The diameter of the fuel orifice 25 is larger than the diameter of the fuel orifice 25. [

In addition, the shape of the diameter and the cross-sectional area may be formed differently according to the fuel concentration in the previously designed injection channel 22. For example, as shown in FIG. 7A, when eight fuel injection channels 22 are formed, four fuel lean injection channels 22 may be arranged continuously and four fuel and impregnation channels 22 may be arranged continuously And it can be seen that the fuel and the dilution channel 22 and the fuel lean injection channel 22 in the eight injection channels 22 may be arranged to cross each other as shown in FIG. 7B.

That is, the diameter and geometry of the fuel delivery orifice 25 may vary according to the fuel concentration of the design mixer in each injection channel 22. [

The throttling portion 13 of the oxidizing agent supply chamber 10 is formed at a predetermined position in the longitudinal direction of the injection block 20 and the position of the throttling portion outlet end 13-2 The discharge end 24 is positioned at a certain distance from the discharge end 24 of the discharge opening 24a. The length and angle of the throttling portion 13 are determined according to the variation range of the fuel-oxidizing agent mixing characteristic design and the inner diameter of the throat portion outlet end 13-2 is the same as the outer diameter of the injection block 20, do.

FIG. 8 is a cross-sectional view of a fuel rich and lean premixed industrial gas combustor 100 according to a second embodiment of the present invention. 9A and 9B are cross-sectional views taken along the line B-B of FIG. 8 showing the arrangement of the fuel rich (PR) fuel lean (PL) injection channel 22 in the second embodiment.

The fuel rich lean-burn type industrial gas combustor 100 according to the second embodiment of the present invention is also applicable to the oxidizer supply chamber 10, the injection block 20, the fuel supply line 30, And an orifice 25 for fuel use.

As described above, the oxidant supply chamber 10 includes an oxidant chamber 11 to which an oxidant is supplied, an output end which is open at one side and has an inner diameter smaller than that of the oxidant chamber 11, And a throttling portion 13 whose diameter is gradually reduced between the first and second portions.

The injection block 20 is configured to partially enclose the output end of the oxidant supply chamber 10 and a fuel chamber 21 is provided at the center of the interior to supply the fuel and the inlet end 23 of the oxidant supply chamber 10 The oxidizing agent is mixed and mixed with the oxidizing agent so as to be injected to the discharge end side, and is arranged in a circumferential direction spaced apart from each other in the form of a concave groove inwardly from the outer side. The lengthwise direction is formed into a straight or spiral shape, And a plurality of injection channels 22 formed differently from one another in accordance with the shape of the injection channel.

The fuel supply pipe 30 passes through the other side of the oxidizer chamber 11 and is coupled at one end to the fuel chamber 21 side of the injection block 20 in a detachable manner.

A fuel distribution orifice 25 is provided between the fuel chamber 21 of the injection block 20 and each injection channel 22 so that fuel in the fuel chamber 21 is injected into each injection channel 22, do.

As described above, the fuel distribution orifice 25 is formed between the fuel chamber 21 and the center of the width direction of the injection channel 22, and its cross-sectional shape is constituted by a circle, an ellipse, or a square, The number, cross-sectional area, and cross-sectional shape in each injection channel 22 can be configured differently based on the mixed fuel concentration designed in the injection channel 22.

In the second embodiment of the present invention, as shown in FIGS. 8, 9A, and 9B, the fuel supply pipe 30 is provided on the inner coaxial axis of the fuel supply pipe 30 and injects oxygen into the discharge end through the injection block 20 And an oxygen supply nozzle (40).

The throttling portion 13 of the oxidizing agent supply chamber 10 is formed at a predetermined position in the longitudinal direction of the injection block 20 and the position of the throttling portion outlet end 13-2 The discharge end 24 is positioned at a certain distance from the discharge end 24 of the discharge opening 24a. The length and angle of the throttling portion 13 are determined according to the variation range of the fuel-oxidizing agent mixing characteristic design and the inner diameter of the throat portion outlet end 13-2 is the same as the outer diameter of the injection block 20, do.

In the second embodiment of the present invention, a taper may be formed on the outer side of the other end of the injection block 20 to diffuse the mixed gas injected from each injection channel 22.

In the second embodiment of the present invention, the injection block 20 and the fuel supply pipe 30 are integrally moved in the longitudinal direction to move the throttle portion 13 in the axial direction relative to the injection block 20 And the like.

10 shows a cross-sectional view of a fuel rich and lean premixed industrial gas combustor 100 according to a second embodiment of the present invention in which the injection block 20 is moved by a certain length in the axial direction. 11A and 11B are cross-sectional views taken along the line C-C of Fig.

In the second embodiment of the present invention, the fuel supply pipe 30 is provided with a through hole penetrating the other side of the oxidant chamber 11 of the oxidant supply chamber 10 and a rotary knob 52 formed outside the other side of the oxidant chamber 11 Is tightly coupled to the tension spring (54) formed in the oxidant chamber (11). A sliding member 51 may be provided between the screw pipe 55 and the fuel supply pipe 30. The tension spring 54 may be provided on the inner surface of the other side of the oxidant chamber 11 and on the outer surface of the fuel supply pipe 30 And the jaws 53, as shown in Fig.

Therefore, the outer rotary knob 52 of the combustor 100 is rotated to adjust the axial relative position of the cylindrical injection block 20 (axial position of the fuel distribution orifice 25) at the inner throttle portion 13 of the oxidizer chamber 11 Control).

By this moving means, the circumferential fuel-oxidant mixing characteristic (degree of mixture) is controlled in the throttling portion 13 in accordance with the axial relative position of the cylindrical injection block 20 (axial position of the fuel distribution orifice 25) .

That is, the fuel-oxidant mixture gas having the fuel mixture concentration different in the circumferential direction in the throttling portion 13 of the oxidizing agent supply chamber 10 is divided into the injection channel 22 formed in the cylindrical injection block 20 , The mixed gas having a specific fuel concentration in the circumferential direction of the discharge end of the cylindrical injection block 20 is injected through the injection channel 22 and mixed and ignited between the mixed gas of the ignition mixture 22 or the adjacent injection channel 22 Different combustion characteristics can be realized.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The foregoing description of the preferred embodiments of the invention disclosed herein has been presented to enable any person skilled in the art to make and use the present invention. While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. For example, those skilled in the art can utilize each of the configurations described in the above-described embodiments in a combination of them. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that do not have an explicit citation in the claims may be combined to form an embodiment or be included in a new claim by amendment after the filing.

10: oxidant supply room
11: oxidizer chamber
12: Outlet section
13:
13-1: inlet end
13-2: Outlet section
20: injection block
21: Fuel chamber
22: injection channel
23: injection channel inlet end
24: Discharge channel discharging end
25: Fuel split orifice
30: fuel supply pipe
31: Mounting stage
40: oxygen supply nozzle
51: Sliding member
52: rotation knob
53: stiff jaw
54: Tension spring
55: screwman
100: fuel-rich lean premixed industrial gas burner

Claims (17)

In an industrial gas combustor,
An oxidant supply chamber having an output end to which an oxidant is supplied and an open end is opened;
A fuel chamber in which an output end of the oxidant supply chamber is enclosed, a fuel chamber provided at an inner central portion of the fuel chamber to supply fuel, and a plurality of injection channels having a plurality of injection channels in which an oxidant of the oxidant supply chamber flows into the inlet end, block; And
And a fuel distributing orifice provided between the fuel chamber of each of the injection blocks and each of the injection channels and injecting fuel in the fuel chamber into the injection channel.
The method according to claim 1,
Wherein the injection channel is formed in a groove shape recessed inwardly from the outer surface of the injection block and is spaced apart from each other by a predetermined distance in the circumferential direction and is formed in a linear or spiral shape in the longitudinal direction. .
3. The method of claim 2,
Wherein the width and height of the injection channel are differently formed according to the oxidant design flow rate.
3. The method of claim 2,
Wherein the fuel distribution orifice is formed between the fuel chamber and the center of the spray channel in the width direction and the cross-sectional shape is circular, elliptical, or quadrilateral.
5. The method of claim 4,
Wherein the fuel distribution orifice is configured differently in number, cross-sectional area, and cross-sectional shape in each injection channel, based on the mixed fuel concentration designed in each injection channel.
A method of operating an industrial gas combustor,
Supplying fuel to a fuel chamber provided in a central portion of an injection block configured to supply an oxidant to the interior of the oxidant supply chamber and enclose an output end of the oxidant supply chamber;
A step of introducing an oxidizing agent into the oxidizing agent supply chamber into an inlet end of a plurality of injection channels longitudinally arranged in a straight or spiral shape and spaced apart from each other by a predetermined distance in the circumferential direction, ;
Injecting fuel in the fuel chamber into each of the injection channels through a plurality of fuel distribution orifices provided between a fuel chamber of the injection block and each of the injection channels to mix fuel and oxidizer; And
And mixing the fuel with the oxidant through the outlet end of each of the injection channels.
The method according to claim 6,
Wherein the fuel distribution orifice is formed between the fuel chamber and the center of the width direction of the injection channel and has a cross-sectional shape of a circle, an ellipse, or a quadrangle, Wherein the number, the cross-sectional area, and the cross-sectional shape in the channel are configured differently.
In an industrial gas combustor,
An oxidant supply chamber having an oxidant chamber to which an oxidant is supplied into the chamber, an output end which is opened at one side and has an inner diameter smaller than that of the chamber, and a throttling portion whose diameter gradually decreases between the oxidant chamber and the output end;
A fuel chamber in which an output end of the oxidant supply chamber is enclosed, a fuel chamber provided at an inner central portion of the fuel chamber and supplied with fuel, an inlet end, and an oxidant inlet of the oxidant supply chamber, A plurality of injection channels arranged in a circumferential direction spaced apart from each other in a circumferential direction and formed in a linear or spiral shape in a longitudinal direction and different in width and height according to an oxidant design flow rate;
A fuel supply pipe penetrating the other side of the oxidant chamber and having one end coupled detachably with the fuel chamber of the injection block; And
And a fuel distribution orifice of a gas combustor provided between the fuel chamber of each of the injection blocks and each of the injection channels to inject fuel in the fuel chamber into the injection channel. burner.
9. The method of claim 8,
Wherein the position of the outlet end of the throttle portion is located at a certain distance from the injection block discharge end to the upstream side on the basis of the flow direction.
10. The method of claim 9,
Wherein the length and the angle of inclination of the throttle portion are determined according to a fluctuation range of the mixing characteristic design of the fuel and the oxidizer.
11. The method of claim 10,
Wherein the fuel distribution orifice is formed between the fuel chamber and the center of the width direction of the injection channel, the cross-sectional shape of the fuel distribution orifice being circular, elliptical or rectangular, and based on the mixed fuel concentration designed in each injection channel, Sectional area, and cross-sectional shape of the gas-liquid separator are different from each other.
12. The method of claim 11,
Further comprising moving means for moving the injection block in the longitudinal direction to adjust the axial relative position of the injection block in the axis portion.
13. The method of claim 12,
And the moving means adjusts the axial relative position of the injection block to change the circumferential fuel and oxidizer mixing characteristics in the throttle portion.
9. The method of claim 8,
Further comprising an oxygen supply nozzle coaxially disposed inside the fuel supply pipe and injecting oxygen through the injection block. ≪ RTI ID = 0.0 > 15. < / RTI >
A method of operating an industrial gas combustor,
Supplying fuel to a fuel chamber provided in a central portion of the injection block, the oxidant being supplied into the oxidant chamber of the oxidant supply chamber and the output end of the oxidant supply chamber being enclosed;
And a plurality of exhaust ports arranged at predetermined intervals in the circumferential direction and recessed inwardly from the outer surface of the injection block at an intermediate portion between the oxidant chamber and the output end, Introducing an oxidant into the inlet end of the injection channel;
Injecting fuel in the fuel chamber into each of the injection channels through a plurality of fuel distribution orifices provided between a fuel chamber of the injection block and each of the injection channels to mix fuel and oxidizer; And
Wherein the fuel and the oxidant are mixedly injected through the outlet end of each injection channel,
Wherein the fuel distribution orifice is formed between the fuel chamber and the center of the width direction of the injection channel and has a cross-sectional shape of a circle, an ellipse, or a quadrangle, Wherein the number, the cross-sectional area, and the cross-sectional shape in the channel are configured differently.
16. The method of claim 15,
Further comprising the step of moving the injection block in the longitudinal direction by the moving means to adjust the axial relative position of the injection block in the axis portion to change the circumferential fuel and oxidant mixing characteristics in the axis portion Wherein the gas burner is a fuel burner.
17. The method of claim 16,
Further comprising the step of injecting oxygen through the injection block by an oxygen supply nozzle provided coaxially inside the fuel supply pipe. ≪ RTI ID = 0.0 > 18. < / RTI >

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