KR101735640B1 - operating method and device for multi-stage combustion of petroleum cokes - Google Patents
operating method and device for multi-stage combustion of petroleum cokes Download PDFInfo
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- KR101735640B1 KR101735640B1 KR1020150075012A KR20150075012A KR101735640B1 KR 101735640 B1 KR101735640 B1 KR 101735640B1 KR 1020150075012 A KR1020150075012 A KR 1020150075012A KR 20150075012 A KR20150075012 A KR 20150075012A KR 101735640 B1 KR101735640 B1 KR 101735640B1
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- Prior art keywords
- fuel
- combustion furnace
- combustion
- supplied
- injector
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
- F23C1/10—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air liquid and pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
- F23C5/10—Disposition of burners to obtain a flame ring
- F23C5/12—Disposition of burners to obtain a flame ring for pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/30—Staged fuel supply
- F23C2201/301—Staged fuel supply with different fuels in stages
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The present invention relates to a petroleum coke multi-stage combustion apparatus that distributes, controls, and separately supplies petroleum coke as fuel to be supplied to a combustion furnace in multiple stages. Wherein the fuel is supplied into the combustion furnace through the burner, and the remainder of the two or more fuels is supplied to the combustion chamber through the burner, And a fuel supply unit for directly supplying the fuel to the inside of the combustion furnace through one side of the combustion furnace, wherein the equivalent ratio of the total fuel at predetermined conditions required for flame combustion can be uniformly formed As a result, stable flame formation in the combustion furnace, resolution of the high-temperature region in the flame, and securing of the residence time of the fuel are possible, Can be minimized.
Description
The present invention relates to a combustion apparatus, and more particularly, to a solid fuel multi-stage combustion apparatus that distributes, controls, and separately supplies fuel supplied to a petroleum coke combustion system in multiple stages.
In conventional combustors using fossil fuels, it is inevitable to produce nitrogen oxides (NOx) having chemical formulas of NO and NO2 by chemical reaction at the time of combustion. The low NOx combustion technology for suppressing the generation of NOx has been developed to improve the structure of the combustor such as the mixture form of the fuel and the air and the air-fuel ratio. Nitrogen oxides generated in the combustion process react with other oxygen in the atmosphere and cause environmental problems such as smog and atmospheric ozone increase. In particular, emissions from these combustion processes are harming the environment and human health, and countries are tightening regulations on an increasingly stringent level.
The types of nitrogen oxides can be classified into thermal NOx, rapid NOx, and fuel NOx depending on the cause. The thermal nitrogen oxides are produced by the reaction of nitrogen in the air with oxygen at a high temperature of 1600 ° C or higher. Rapid nitrogen oxides are generated at the initial stage of combustion in the combustion of hydrocarbon-based fuels. The fuel nitrogen oxides react with the nitrogen components contained in the fuel Lt; / RTI > Even in the countermeasures against such nitrogen oxides, it is effective to control matters related to thermal NOx and Prompt NOx because gaseous fuels such as natural gas do not contain nitrogen components in the fuel.
Nitrogen oxides cause photochemical smog and acid rain and are known to have serious effects on flora and fauna. For a long time many researchers have studied various ways to reduce NOx.
As a result of this, low NOx methods currently being tried include exhaust gas recirculation, water or steam injection, multi-stage combustion of air and fuel, selective non-catalytic reduction (SNCR), selective catalytic reduction (SCR) catalytic reduction). Recently, advanced countries are attempting to recycle NOx in the afterburning region, and it is known that NOx reduction efficiency and economic efficiency are high.
As an invention of the present applicant, Korean Patent Registration No. 1512352 discloses a combustion apparatus for reducing NOx through gas recirculation in a combustion furnace.
However, the above-described invention is very effective for reducing NOx, but it does not precisely control the combustion conditions inside the combustion furnace. In order to optimize the combustion conditions as well as the reduction of NOx, it is necessary to precisely control the basic fuel supply something to do.
That is, the petroleum coke, which is a solid fuel used in the combustors as described above, has a very low volatile content and a very high content of fixed carbon, so that the ignition property and reactivity are very poor. In order to completely burn, Is required. Currently, only the combustor and the combustion technology developed by the applicant of the present invention is unique to the petroleum coke fuel combustor, and the conventional combustor is modified and optimized for the coal (pulverized coal) combustor. Therefore, it is difficult to secure the stability of the combustion system, There is a problem that a large amount of harmful substances (NOx) are generated. This hinders energy efficient use, which increases the fuel cost burden and increases the maintenance cost of post-treatment facilities such as SCR.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a combustion system for a petroleum coke, which includes a combustor for mixed combustion with a liquid fuel such as a petroleum coke oven and refined oil, It is an object of the present invention to provide a combustion device which is excellent in stability and economical efficiency of a combustion system and in improving the low-pollution performance through improvement in stability and low-emission.
According to an aspect of the present invention, there is provided a combustion apparatus comprising: a combustion section having a burner positioned at one side of a combustion furnace and a combustion furnace; and two or more petroleum cokes as a fuel are separately supplied to the combustion section, And a fuel supply unit for supplying a part of the fuel to the inside of the combustion furnace through the burner and directly supplying the rest of the two or more fuels to the inside of the combustion furnace through one side of the combustion furnace .
According to the petroleum coke multi-stage combustion apparatus of the present invention as described above, the equivalence ratio of the total fuel at predetermined conditions required for flame combustion can be uniformly formed, and stable flame formation in the combustion furnace and high- And the residence time of the fuel can be secured, the generation of nitrogen oxides can be minimized.
1 is a schematic view of a petroleum coke multi-stage combustion apparatus according to an embodiment of the present invention.
2 is a schematic view of a petroleum coke multi-stage combustion apparatus according to another embodiment of the present invention.
3 is a schematic view of a combustion unit which is an embodiment of a petroleum coke multi-stage combustion apparatus according to an embodiment of the present invention.
4 is a schematic view of a combustion unit which is an embodiment of a petroleum coke multi-stage combustion apparatus according to another embodiment of the present invention.
FIG. 5 is a schematic view of a burner as a constitution of a petroleum coke multi-stage combustion apparatus according to an embodiment of the present invention, wherein FIG. 5A is a vertical sectional view, and FIG.
FIG. 6 is a schematic view of a burner which is a constitution of a petroleum coke multi-stage combustion apparatus according to another embodiment of the present invention, wherein FIG. 6A is a vertical sectional view, and FIG.
FIG. 7 is a schematic view of a dispensing part which is a constitution of a petroleum coke multi-stage combustion apparatus according to an embodiment of the present invention.
These and other objects, features and other advantages of the present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, the definitions of these terms should be described based on the contents throughout this specification.
In addition, the described embodiments are provided for illustrative purposes and do not limit the technical scope of the present invention.
The components constituting the petroleum coke multi-stage combustion apparatus of the present invention can be used integrally or individually. In addition, some components may be omitted depending on the usage pattern.
Hereinafter, a petroleum coke multi-stage combustion apparatus according to preferred embodiments of the present invention (hereinafter simply referred to as a 'combustion apparatus') will be described with reference to FIGS. 1 to 7 .
First, the combustion apparatus according to the first embodiment of the present invention will be described in detail.
As shown in FIG. 1, the combustion apparatus according to the first embodiment of the present invention includes a
The
The
3, the
The
The first
The first
The second
5, the
In addition, a
1, the
Generally, in the above-described combustion processes, the fuel is supplied into the
In the present invention, the fuel (f) is distributed and supplied to the
Each of the
The first
The second
As described above, a plurality of
The first fuel f1 is supplied into the
Next, a combustion apparatus according to another embodiment of the present invention will be described.
In the following description, for the sake of understanding and explanation of the invention, differences from the above-described embodiment will be mainly described, and description of the other constituent elements will be omitted.
Hereinafter, a combustion apparatus according to a second embodiment of the present invention will be described.
As shown in FIG. 1, the
6, the burner 120 'in the present embodiment includes a second fuel injector 123' positioned between the
Unlike the first embodiment, the
4, the first fuel f1 is burned in the vicinity of the
Next, a combustion apparatus according to a third embodiment of the present invention will be described.
2, the combustion apparatus according to the third embodiment of the present invention includes a single
7, the
2 and 4, the first
In other words, the fuel f supplied from the single
Next, a combustion apparatus according to a fourth embodiment of the present invention will be described.
The combustion apparatus according to the fourth embodiment of the present invention has the same overall configuration and supply system as that of the third embodiment except that the burner further includes the second fuel injector 123 ' The fuel f is divided into the first fuel f1 and the second fuel f2 in the
That is, in the first to fourth embodiments, the fuel f is distributed to the
In the third and fourth embodiments described above, the distribution of the fuel f supplied from the single
As described above, according to the combustion apparatus of the present invention, in order to realize a uniform equivalence ratio in the combustion operation of the petroleum coke or the petroleum coke and the liquid fuel, the fuel is distributed and supplied in multiple stages to produce a uniform equivalent ratio Formation and efficient flame partitioning are used to improve stability and economic efficiency of combustion system and improve low pollution performance through improvement of combustion stability and low pollution.
Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that numerous modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims. And equivalents should also be considered to be within the scope of the present invention.
100:
110: Combustion furnace
120, 120 ': burner
121: auxiliary fuel injection body
122: first air jetting body
123: First fuel injection body
123 ': a second fuel injector
124: second air jetting body
125: third air jetting body
126: Swivel
200: fuel supply unit
210: a first fuel supply unit
220: second fuel supply part
400:
410: fuel inlet pipe
420: First fuel outlet pipe
430: Second fuel outlet pipe
500:
Claims (11)
An auxiliary fuel injector 121 located at the center of the burner 120 and injecting liquid fuel into the combustion furnace;
A first fuel injector 123 positioned to surround the auxiliary fuel injector 121 and injecting petroleum coke fuel f into the combustion furnace; And
The first fuel f1 is divided into the first fuel f1 and the second fuel f2 and supplied to the combustion furnace 110. The first fuel f1 is supplied to the first fuel injector 123 The second fuel f2 is supplied to the combustion furnace 110 via the side of the combustion furnace 110 to be burned together with the liquid fuel supplied to the auxiliary fuel injection body 121, And a fuel supply unit (200) for directly supplying the fuel to the combustion furnace (110)
Petroleum coke fuel multistage combustion apparatus.
The fuel supply unit 200,
A first fuel supply unit 210 for supplying the first fuel f1 into the combustion furnace 110 through the first fuel injector 123 and a second fuel supply unit 210 for supplying the second fuel f2 to the combustion furnace 110, And a second fuel supply unit 220 for directly supplying fuel into the combustion furnace 110 through a side surface of the combustion furnace 110,
Wherein the first fuel (f1) and the second fuel (f2) are supplied into the combustion furnace (110) at a predetermined ratio,
Petroleum coke fuel multistage combustion apparatus.
An auxiliary fuel injector 121 located at the center of the burner 120 and injecting liquid fuel into the combustion furnace;
A first fuel injector 123 positioned to surround the auxiliary fuel injector 121 and injecting petroleum coke fuel f into the combustion furnace; And
A fuel supply unit 200 for supplying the petroleum coke fuel f to the combustion furnace 110; And
Wherein the first fuel f1 and the second fuel f2 are connected to the side of the combustion furnace 110 and the fuel supply unit 200 to distribute and supply the petroleum coke fuel f to the first fuel f1 and the second fuel f2, The fuel f1 is supplied into the combustion furnace 110 through the first fuel injector 123 to burn together with the liquid fuel supplied to the auxiliary fuel injector 121, And a distributor (400) for directly supplying fuel (f2) into the combustion furnace (110) through a side surface of the combustion furnace (110)
Petroleum coke fuel multistage combustion apparatus.
The distribution unit 400 includes:
A fuel inlet pipe 410 through which the petroleum coke fuel f supplied from the fuel supply unit 200 flows into one side, a first fuel outlet pipe 430 branched from the other side of the fuel inlet pipe 410, And a second fuel outlet pipe (420)
The first fuel outlet pipe 430 is connected to the side of the combustion furnace 110 and the second fuel outlet pipe 420 is connected to the first fuel injector 123,
The petroleum coke fuel f flowing into the fuel inlet pipe 410 is distributed to the first fuel f1 and the second fuel f2 in a predetermined ratio and the first fuel f1 is distributed to the first fuel f1 and the second fuel f2, Is supplied into the combustion furnace 110 through the fuel injector 123 and the second fuel f2 is supplied into the combustion furnace 110 through the side face of the furnace 110,
Petroleum coke fuel multistage combustion apparatus.
An auxiliary fuel injector 121 located at the center of the burner 120 'and injecting liquid fuel into the combustion furnace;
A first fuel injector 123 positioned to surround the auxiliary fuel injector 121 and injecting petroleum coke fuel into the furnace;
A second fuel injector 123 'positioned to surround the first fuel injector 123 and injecting petroleum coke fuel into the furnace; And
The petroleum coke fuel f is divided into a first fuel f1 and a second fuel f2 and is supplied into the combustion furnace 110 through the burner 120 ' The first fuel f1 is supplied into the combustion furnace 110 through the first fuel injector 123 to be burned together with the liquid fuel supplied to the auxiliary fuel injector 121 And a fuel supply unit 200 for supplying the second fuel f2 into the combustion furnace 110 through the second fuel injector 123 '
Petroleum coke fuel multistage combustion apparatus.
The fuel supply unit 200,
The first fuel f1 and the second fuel f2 are supplied into the combustion furnace 110 through the first fuel injector 123 and the second fuel injector 123 ' A supply unit 210 and a second fuel supply unit 220,
The first fuel f1 and the second fuel f2 are distributed at a predetermined ratio in the first fuel supply unit 210 and the second fuel supply unit and are supplied to the first fuel injector 123 and the second fuel injector 123, And is supplied into the combustion furnace 110 through the fuel injector 123 '
Petroleum coke fuel multistage combustion apparatus.
An auxiliary fuel injector 121 located at the center of the burner 120 'and injecting liquid fuel into the combustion furnace;
A first fuel injector 123 positioned to surround the auxiliary fuel injector 121 and injecting petroleum coke fuel f into the combustion furnace;
A second fuel injector 123 'positioned to surround the first fuel injector 123 and injecting petroleum coke fuel f into the combustion furnace; And
A fuel supply unit 200 for supplying the petroleum coke fuel f to the combustion unit 100; And
The fuel is supplied to the combustion furnace 100 and the fuel supply unit 200 so that the petroleum coke fuel f is distributed to the first fuel f1 and the second fuel f2 according to a predetermined ratio, The divided first fuel f1 is supplied into the combustion furnace 110 through the first fuel injector 123 to be burned together with the liquid fuel supplied to the auxiliary fuel injector 121 And a distributor (400) for supplying the second fuel (f2) into the combustion furnace (110) through the second fuel injector (123 '
Petroleum coke fuel multistage combustion apparatus.
The distribution unit 400 includes:
A fuel inlet pipe 410 through which the petroleum coke fuel f supplied from the fuel supply unit 200 flows into one side, a first fuel outlet pipe 430 branched from the other side of the fuel inlet pipe 410, And a second fuel outlet pipe (420)
The first fuel outlet pipe 430 is connected to the first fuel injector 123 and the second fuel outlet pipe 420 is connected to the second fuel injector 123 '
The petroleum coke fuel f flowing into the fuel inlet pipe 410 flows through the first fuel outlet pipe 430 and the second fuel outlet pipe 420 to the first fuel f1 at the predetermined ratio, Wherein the first fuel f1 is supplied into the combustion furnace 110 through the first fuel injector 123 and the second fuel f2 is supplied into the combustion furnace 110 via the first fuel injector 123, And is supplied into the combustion furnace 110 through the second fuel injector 123 '
Petroleum coke fuel multistage combustion apparatus.
Further comprising a damper installed in the first fuel outflow pipe and the second fuel outflow pipe to adjust a distribution ratio to the first fuel f1 and the second fuel f2, ,
Petroleum coke fuel multistage combustion apparatus.
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KR1020150075012A KR101735640B1 (en) | 2015-05-28 | 2015-05-28 | operating method and device for multi-stage combustion of petroleum cokes |
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KR1020150075012A KR101735640B1 (en) | 2015-05-28 | 2015-05-28 | operating method and device for multi-stage combustion of petroleum cokes |
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KR20160141138A KR20160141138A (en) | 2016-12-08 |
KR101735640B1 true KR101735640B1 (en) | 2017-05-17 |
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JP6084817B2 (en) * | 2012-11-14 | 2017-02-22 | 榮子 山田 | High area reduction rolling method |
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KR101512352B1 (en) | 2013-11-12 | 2015-04-23 | 한국생산기술연구원 | Low NOx Burner using forced internal recirculation of flue gas and method thereof |
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JP6084817B2 (en) * | 2012-11-14 | 2017-02-22 | 榮子 山田 | High area reduction rolling method |
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