CN116608461A - Combustion system and boiler system with same - Google Patents
Combustion system and boiler system with same Download PDFInfo
- Publication number
- CN116608461A CN116608461A CN202310754060.1A CN202310754060A CN116608461A CN 116608461 A CN116608461 A CN 116608461A CN 202310754060 A CN202310754060 A CN 202310754060A CN 116608461 A CN116608461 A CN 116608461A
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- pulverized coal
- outlet
- combustion
- inlet
- powder
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 145
- 239000003245 coal Substances 0.000 claims abstract description 218
- 239000002817 coal dust Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims description 75
- 239000003381 stabilizer Substances 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L5/00—Blast-producing apparatus before the fire
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The combustion system provided by the embodiment of the invention provides a combustion system and a boiler system with the same, wherein the combustion system comprises a pulverized coal wind supply device, a pulverized coal concentration device and a combustion unit. The pulverized coal air inlet of the pulverized coal concentration device is connected with the pulverized coal air supply device, the pulverized coal concentration device is also provided with a light pulverized coal air outlet and a thick pulverized coal air outlet, the combustion unit comprises a stable burner and a burner, and the stable combustion inlet of the stable burner is connected with the thick pulverized coal air outlet; the combustion inlet of the burner is connected with the light coal dust air outlet. The combustion system provided by the embodiment of the invention can realize stable combustion in a low-load state.
Description
Technical Field
The invention belongs to the technical field of boiler combustion in a thermal power plant, and particularly relates to a combustion system and a boiler system with the same.
Background
The existing ultralow-load stable combustion technology of the thermal power plant mostly adopts auxiliary combustion supporting means, such as adding a fuel gun, adding a plasma ignition device and the like, and has certain effects, but the extra energy consumption is larger, so that the operation economy is poor. There are also modifications to the burner, but the variation is large and the effect is not ideal.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
To this end, embodiments of the present invention provide a combustion system.
The combustion system of the embodiment of the invention comprises:
a pulverized coal wind supply device,
a pulverized coal concentrating device, a pulverized coal air inlet of the pulverized coal concentrating device is connected with the pulverized coal air supply device,
the pulverized coal concentrating device is also provided with a light pulverized coal air outlet and a concentrated pulverized coal air outlet,
the combustion unit comprises a stable burner and a burner, and a stable combustion inlet of the stable burner is connected with the concentrated pulverized coal wind outlet; the combustion inlet of the burner is connected with the light coal dust air outlet.
The combustion system of the embodiment of the invention divides the combustion unit of the thermal power plant into two units,
the burner is used for realizing the combustion of all coal dust fed into the boiler, and meanwhile, the burner is provided with a coal dust nozzle used for feeding the coal dust required by the combustion of the boiler into the boiler.
Secondly, the burner with the preheating function can play a role in stabilizing the flame of the burner in a low-load state of the boiler, so that the problem that the burner in the low-load state is flameout is avoided.
Therefore, the combustion system provided by the embodiment of the invention can realize stable combustion of the combustion unit in a low-load state by decomposing the combustion unit into the combustor and the stabilizer, thereby expanding the load range of the combustion system.
Therefore, the combustion system of the embodiment of the invention can realize stable combustion in a low-load state.
In some embodiments, the combustion system according to the embodiments of the present invention further includes a first venturi conveyor, a first powder inlet of the first venturi conveyor is connected to the concentrated coal powder outlet, a first air inlet of the first venturi conveyor is filled with high-pressure gas, and a first air outlet of the first venturi conveyor is connected to the stable combustion inlet.
In some embodiments, the pulverized coal air supply device comprises a primary air fan and a coal mill, wherein a fan outlet of the primary air fan is connected with a primary air inlet of the coal mill, and a pulverized coal air outlet of the coal mill is connected with a pulverized coal inlet of the pulverized coal concentration device.
In some embodiments, the pulverized coal concentrating device comprises a right-angle elbow pipe fitting, wherein an elbow inlet of the right-angle elbow pipe fitting is connected with the pulverized coal air outlet, and a baffle plate is arranged at the elbow outlet of the right-angle elbow pipe fitting and divides the outlet of the right-angle elbow pipe fitting into the concentrated pulverized coal air outlet and the light pulverized coal air outlet; the cross-sectional area of the concentrated coal powder outlet is smaller than that of the dilute coal powder outlet.
In some embodiments, the combustion system of the present invention further comprises a pulverized coal feed device including a wind-powder separation device and a second venturi conveyor,
the third air inlet of the air-powder separator is connected with the concentrated coal powder air outlet;
the second powder inlet of the second Venturi conveyor is connected with the powder outlet of the wind-powder separation device,
the second air inlet of the second Venturi conveyor is connected with the air supply device,
the air outlet of the second Venturi conveyor is connected with the combustion stabilizing inlet of the combustion stabilizer;
the third air outlet of the wind-powder separator is connected with the combustion inlet of the combustor;
in some embodiments, the combustion system according to the embodiments of the present invention further includes a surge bin, wherein a surge inlet of the surge bin is connected to a powder outlet of the wind-powder separation device, and a surge outlet of the surge bin is connected to a second powder inlet of the venturi conveyor.
In some embodiments, the combustion system of the embodiments of the present invention further comprises a pulverized coal feeder, wherein a feeding inlet of the pulverized coal feeder is connected to the buffer outlet of the buffer bin, and a feeding outlet of the pulverized coal feeder is connected to the second powder inlet of the second venturi.
The embodiment of the invention also provides a boiler system, which comprises a boiler body and the combustion system according to the embodiment, wherein the combustion unit of the combustion system is arranged on the boiler body.
In some embodiments, the stabilizer is inserted into the burner, the burner further having a pulverized coal nozzle, the axis of the pulverized coal nozzle being collinear with the axis of the stabilizer.
In some embodiments, the number of the burners is four, the four burners are arranged on the boiler body in a tangential manner, the burner is arranged in parallel with the burner, and an included angle is formed between the axis of the burner and the axis of the pulverized coal nozzle.
Drawings
FIG. 1 is a schematic structural view of a combustion system according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a combustion system according to another embodiment of the present invention;
FIG. 3 is a schematic view of a boiler system according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of another embodiment of a boiler system according to an embodiment of the present invention.
Reference numerals:
1. a pulverized coal wind supply device;
101. a primary air blower; 1011. a fan outlet; 102. a coal mill; 1021. a raw coal inlet; 1022. a primary air inlet; 1023. a pulverized coal air outlet;
2. a coal powder concentrating device;
201. a right angle elbow fitting; 2011. an inlet of the elbow piece; 2012. an outlet of the elbow piece;
202. a partition plate;
203. a light coal dust air outlet; 204. a concentrated coal powder wind outlet;
205. a coal dust air inlet;
3. a combustion unit; 301. a burner; 3011. a combustion inlet; 302. a flame stabilizer; 3021. a stable combustion inlet;
4. a first venturi conveyor; 401. a first powder inlet; 402. a first air inlet; 403. a first air outlet;
5. a second venturi conveyor; 501. a second powder inlet; 502. a second air inlet; 503. a second air outlet;
6. a wind-powder separation device; 601. a third air inlet; 602. a third air outlet; 603. a powder outlet;
7. a buffer bin; 701. a buffer inlet; 702. a buffer outlet;
8. a pulverized coal feeder;
801. a feed inlet; 802. a feed outlet;
9. a boiler body.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A combustion system according to an embodiment of the present invention is described below with reference to fig. 1.
As shown in fig. 1, the combustion system of the embodiment of the present invention includes a pulverized coal wind supply device 1, a pulverized coal concentrating device 2, and a combustion unit 3.
The pulverized coal air inlet 205 of the pulverized coal concentrating device 2 is connected with the pulverized coal supply device 1,
the pulverized coal concentrating apparatus 2 further has a lean pulverized coal air outlet 203 and a rich pulverized coal air outlet 204,
the combustion unit 3 comprises a burner 302 and a burner 301, wherein a combustion stabilizing inlet 3021 of the burner 302 is connected with the concentrated coal dust wind outlet 204; the combustion inlet 3011 of the burner 301 is connected to the fine coal wind outlet 203.
The combustion system of the embodiment of the present invention is constructed by decomposing the combustion unit 3 of the thermal power plant into two units,
one is a burner 301 for realizing the combustion of all the coal dust fed into the boiler, and the burner 301 is provided with a coal dust nozzle for feeding the coal dust required by the combustion of the boiler into the boiler.
The other is that the burner 302 with the preheating function can play a role of stabilizing the flame of the burner 301 in the low-load state of the boiler, so that the problem that the burner 301 in the low-load state is flameout is avoided.
Thus, the combustion system of the embodiment of the present invention can realize stable combustion of the combustion unit 3 in a low load state by decomposing the combustion unit 3 into the burner 301 and the stabilizer 302, thereby expanding the load range of the combustion system.
Therefore, the combustion system of the embodiment of the invention can realize stable combustion in a low-load state.
A combustion system according to an embodiment of the present invention is further described below with reference to fig. 1.
As shown in fig. 1, the combustion system of the embodiment of the present invention includes a pulverized coal wind supply device 1, a pulverized coal concentrating device 2, and a combustion unit 3.
The pulverized coal air inlet 205 of the pulverized coal concentrating device 2 is connected to the pulverized coal air supply device 1, and the pulverized coal air supply device 1 is used for supplying pulverized coal air to the combustion system according to the embodiment of the invention, and it can be understood that the pulverized coal air is an air flow containing pulverized coal.
The pulverized coal concentration device 2 is used for increasing the pulverized coal concentration of part of pulverized coal wind supplied by the pulverized coal wind supply device 1.
It can be understood that, in order to facilitate the resolution of the pulverized coal concentration, the pulverized coal concentrated by the pulverized coal concentrating device 2 is referred to herein as concentrated pulverized coal, the air stream containing the concentrated pulverized coal is referred to as concentrated pulverized coal wind, the pulverized coal not concentrated by the pulverized coal concentrating device 2 is referred to as lean pulverized coal, and the air stream containing the lean pulverized coal is referred to as lean pulverized coal wind.
The pulverized coal concentrating apparatus 2 further has a lean pulverized coal air outlet 203 and a rich pulverized coal air outlet 204,
it can be understood that the pulverized coal wind flowing out of the fine coal wind outlet 203 is a fine coal wind, and the pulverized coal wind flowing out of the concentrated coal wind outlet is a concentrated coal wind.
The combustion unit 3 comprises a burner 302 and a burner 301, wherein a combustion stabilizing inlet 3021 of the burner 302 is connected with the concentrated coal dust wind outlet 204; the combustion inlet 3011 of the burner 301 is connected to the fine coal wind outlet 203.
It can be understood that the concentrated pulverized coal wind flowing out from the concentrated pulverized coal wind outlet 204 of the pulverized coal concentrating device 2 is introduced into the stable combustion inlet 3021 of the stable combustion device 302 to meet pulverized coal required by stable combustion of the stable combustion device 302, and the concentrated pulverized coal wind flowing out from the dilute pulverized coal wind outlet 203 of the pulverized coal concentrating device 2 is introduced into the pulverized coal nozzle of the burner 301 to meet normal combustion of the burner 301, thereby meeting the requirement of supplying heat to the boiler.
It can be appreciated that the pulverized coal air supply device 1 can also be connected with the pulverized coal nozzle of the burner 301 to directly connect the pulverized coal air supplied by the pulverized coal air supply device 1 into the pulverized coal nozzle of the burner 301 so as to meet the pulverized coal requirement of normal combustion of the burner 301.
The combustion system of the embodiment of the invention can realize the concentration separation of the pulverized coal wind supplied by the pulverized coal wind supply device 1 by arranging the pulverized coal concentration unit, meanwhile, the light pulverized coal wind is led into the pulverized coal nozzle of the burner 301, the pulverized coal requirement of normal combustion of the burner 301 is met, the concentrated pulverized coal wind is led into the stable combustion inlet 3021 of the stable combustion device 302, and the pulverized coal requirement of normal combustion of the stable combustion device 302 can be met.
The stabilizer 302 is capable of stabilizing the flame of the burner 301 in a low load state to achieve stable combustion of the combustion unit 3 in a low load state.
In some embodiments, as shown in fig. 1, the combustion system of the embodiment of the present invention further includes a first venturi conveyor 4, a first powder inlet 401 of the first venturi conveyor 4 is connected to the concentrated coal powder outlet, a first air inlet 402 of the first venturi conveyor 4 is filled with high-pressure gas, and a first air outlet 403 of the first venturi conveyor 4 is connected to a stable combustion inlet 3021 of the stable combustion device 302.
It can be understood that the first powder inlet 401 of the first venturi conveyor 4 is connected to the concentrated coal powder outlet of the coal powder concentrator, so that the concentrated coal powder wind flowing out from the concentrated coal powder outlet of the coal powder concentrator is led into the first powder inlet 401 of the first venturi conveyor 4, and at this time, the high-pressure gas is led into the first air inlet 402 of the first venturi conveyor 4 to accelerate the concentrated coal powder wind entering the first venturi conveyor 4, so that the concentrated coal powder wind flows out from the first air outlet 403 of the first venturi conveyor 4 and is led into the stable combustion inlet 3021 of the stable combustion device 302.
Thus, the first venturi conveyor 4 is provided between the concentrated pulverized coal wind outlet 204 of the pulverized coal concentrating device 2 and the steady combustion inlet 3021 of the steady combustion device 302, so that the concentrated pulverized coal wind flowing out from the concentrated pulverized coal outlet of the pulverized coal concentrating device can be smoothly conveyed into the steady combustion inlet 3021 of the steady combustion device 302.
Alternatively, the first air inlet 402 of the first venturi conveyor 4 may be connected to a fan, so as to achieve the effect of delivering high-pressure air into the first air inlet 402 of the first venturi conveyor 4.
In some embodiments, as shown in fig. 1, the pulverized coal air supply device 1 comprises a primary air fan and a coal mill 102, wherein a fan outlet 1011 of the primary air fan is connected with a primary air inlet 1022 of the coal mill 102, and a pulverized coal outlet of the coal mill 102 is connected with a pulverized coal inlet 205 of the pulverized coal concentrating device 2.
According to the pulverized coal air supply device 1 of the combustion system, primary air is introduced into the coal mill 102 through the primary air fan 101 and the coal mill 102, so that pulverized coal generated by the coal mill 102 can be dried on one hand, and on the other hand, the primary air can carry pulverized coal to form pulverized coal air to flow out from a pulverized coal air outlet of the coal mill 102, and the pulverized coal air supply effect is achieved.
It is to be understood that the pulverized coal air supply device 1 of the combustion system of the embodiment of the present invention is not limited to the above-described one as long as the supply of pulverized coal air can be satisfied.
In some embodiments, as shown in fig. 1, the pulverized coal concentrating device 2 includes a right-angle elbow 201, where an elbow inlet 2011 of the right-angle elbow 201 forms a pulverized coal air inlet 205 connected to a pulverized coal air outlet of the coal pulverizer 102, and an elbow outlet 2012 of the right-angle elbow 201 is provided with a partition 202, and the partition 202 divides the elbow outlet 2012 of the right-angle elbow 201 into a concentrated pulverized coal air outlet 204 and a fresh pulverized coal air outlet 203.
Optionally, the baffle 202 is parallel to the axis of the elbow outlet 2012 of the right angle elbow piece 201.
Further, the cross-sectional area of the concentrated coal powder outlet is smaller than the cross-sectional area of the dilute coal powder outlet.
According to the pulverized coal concentration device 2 of the combustion system, the separator 202 is arranged at the outlet of the right-angle elbow pipe fitting 201, so that the separation of the concentration of pulverized coal wind is realized, the concentrated pulverized coal wind flows out from the concentrated pulverized coal wind outlet 204, the pulverized coal concentration effect is achieved, meanwhile, the concentrated pulverized coal wind is introduced into the stable combustion inlet 3021 of the stable combustion device 302, the pulverized coal requirement of normal combustion of the stable combustion device 302 is met, the stable combustion effect of the stable combustion device 302 is further improved, the flame of the combustor 301 can be stabilized in a low-load state of a boiler, and the flameout problem of the combustor 301 in the low-load state is avoided.
In some embodiments, as shown in fig. 2, the combustion system of the embodiment of the present invention further includes a pulverized coal feeding device, where the pulverized coal feeding device includes a wind-powder separation device 6 and a second venturi conveyor 5, and a third air inlet 601 of the wind-powder separator is connected to the concentrated pulverized coal air outlet 204; the second powder inlet 501 of the second venturi conveyor 5 is connected with the powder outlet 603 of the wind-powder separation device 6, the second air inlet 502 of the second venturi conveyor 5 is connected with the air supply device, and the air outlet of the second venturi conveyor 5 is connected with the combustion stabilizing inlet 3021 of the combustion stabilizing device 302; the third air outlet 602 of the wind-powder separator is connected to the combustion inlet 3011 of the burner 301.
Alternatively, the wind-powder separation device 6 is a cyclone separator.
According to the combustion system provided by the embodiment of the invention, the wind-powder separator is arranged, so that the concentrated coal powder in the concentrated coal powder wind can be separated, the concentrated coal powder is input into the second powder inlet 501 of the second venturi conveyor 5 through the powder outlet 603 of the wind-powder separator, and under the action of the air flow of the second air inlet 502 of the second Wen Qiuli conveyor, the concentrated coal powder flows out from the second air outlet 503 of the second venturi conveyor 5 and flows into the stable combustion inlet 3021 of the stable combustion device 302, so that the coal powder requirement of normal combustion of the stable combustion device 302 is met, the stable combustion effect of the stable combustion device 302 is further improved, the flame of the combustor 301 can be stabilized in a low-load state of the boiler, and the flameout problem of the combustor 301 in the low-load state is avoided.
The combustion system of the embodiment of the invention can separate the concentrated coal powder in the concentrated coal powder wind on one hand and smoothly enter the stable combustion inlet 3021 of the stable combustion device 302 under the pneumatic conveying action of the second venturi conveyor 5 on the other hand by arranging the wind-powder separator and the second venturi conveyor 5 so as to meet the coal powder requirement of normal combustion of the stable combustion device 302.
In some embodiments, the pulverized coal feeding device of the combustion system according to the embodiment of the invention further comprises a surge bin 7, wherein a surge inlet 701 of the surge bin 7 is connected to a powder outlet 603 of the wind-powder separation device 6, and a surge outlet 702 of the surge bin 7 is connected to a second powder inlet 501 of the venturi conveyor.
In some embodiments, the pulverized coal feeding device of the combustion system according to the embodiment of the invention further comprises a pulverized coal feeder 8, wherein a feeding inlet 801 of the pulverized coal feeder 8 is connected to the buffer outlet 702 of the buffer bin 7, and a feeding outlet 802 of the pulverized coal feeder 8 is connected to the second powder inlet 501 of the second venturi.
Further, a first sensor (not shown in the figure) is arranged in the surge bin 7, and the first sensor is used for monitoring the amount of the concentrated coal powder in the surge bin 7.
According to the combustion system provided by the embodiment of the invention, through the arrangement of the buffer and the pulverized coal feeder 8, on one hand, concentrated pulverized coal flowing out from the powder outlet 603 of the air-powder separator can be temporarily stored, and the first sensor is arranged to detect the pulverized coal amount in the buffer bin 7, so that the excessive concentrated pulverized coal amount in the pulverized coal bin is avoided.
On the other hand, the amount and speed of the concentrated pulverized coal entering the second pulverized coal inlet 501 of the second venturi conveyor 5 can be controlled by controlling the pulverized coal feeder 8 so that the concentrated pulverized coal can be quantitatively and stably conveyed into the stable combustion inlet 3021 of the stable combustion device 302.
In some embodiments, the air supply device is a primary air fan, and the fan outlet 1011 of the primary air fan is connected to the second air inlet 502 of the second venturi conveyor 5.
In some embodiments, the air supply device is a separate fan (not shown in the figure), and the air supply port of the separate fan is connected to the second air inlet 502 of the second venturi conveyor 5.
It can be appreciated that the high pressure gas in the second air inlet 502 of the second venturi conveyor 5 may be from the first fan or an independent fan, and the specific arrangement mode may be set according to the actual situation on site.
The embodiment of the invention also provides a boiler system, which comprises a boiler body 9 and the combustion system described in the previous embodiment, wherein the combustion unit 3 is arranged on the boiler body 9.
In some embodiments, as shown in fig. 3, a stabilizer 302 is inserted within the burner 301, the burner 301 further having a pulverized coal nozzle, the axis of the stabilizer 302 and the axis of the pulverized coal nozzle being collinear.
It can be appreciated that the stabilizator is inserted into the burner with its axis collinear with the axis of the stabilizator, so that the stabilizator flame completely covers the ignition area of the burner in the boiler, whereby the stabilizator combustion of the burner can be maintained.
In some embodiments, as shown in fig. 4, the number of the burners 301 is four, four burners 301 are arranged in a tangential circle on the boiler body 9, the stabilizer 302 is arranged in parallel with the burners 301, and the axis of the stabilizer 302 forms an angle with the axis of the burner.
It can be appreciated that having an angle between the axis of the burner and the axis of the burner enables the flame of the burner to completely cover the ignition area of the burner within the boiler, thereby enabling stable combustion of the burner to be maintained.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A combustion system, comprising:
a pulverized coal wind supply device,
a pulverized coal concentrating device, a pulverized coal air inlet of the pulverized coal concentrating device is connected with the pulverized coal air supply device,
the pulverized coal concentrating device is also provided with a light pulverized coal air outlet and a concentrated pulverized coal air outlet,
the combustion unit comprises a stable burner and a burner, and a stable combustion inlet of the stable burner is connected with the concentrated pulverized coal wind outlet; the combustion inlet of the burner is connected with the light coal dust air outlet.
2. The combustion system of claim 1, further comprising a first venturi conveyor, wherein a first powder inlet of the first venturi conveyor is connected to the concentrated coal powder outlet, a first air inlet of the first venturi conveyor is filled with high pressure gas, and a first air outlet of the first venturi conveyor is connected to the stable combustion inlet.
3. The combustion system of claim 2, wherein the pulverized coal air supply device comprises a primary air fan and a coal mill, a fan outlet of the primary air fan is connected with a primary air inlet of the coal mill, and a pulverized coal air outlet of the coal mill is connected with a pulverized coal air inlet of the pulverized coal concentration device.
4. The combustion system of claim 1, wherein the pulverized coal concentrating device comprises a right-angle elbow pipe member, an elbow inlet of the right-angle elbow pipe member is connected with the pulverized coal wind outlet, an elbow outlet of the right-angle elbow pipe member is provided with a partition plate, and the partition plate divides an outlet of the right-angle elbow pipe member into the concentrated pulverized coal wind outlet and the fresh pulverized coal wind outlet; the cross-sectional area of the concentrated coal powder outlet is smaller than that of the dilute coal powder outlet.
5. The combustion system of claim 1, further comprising a pulverized coal feed device including a wind-powder separation device and a second venturi conveyor,
the third air inlet of the air-powder separator is connected with the concentrated coal powder air outlet;
the second powder inlet of the second Venturi conveyor is connected with the powder outlet of the wind-powder separation device,
the second air inlet of the second Venturi conveyor is connected with the air supply device,
the air outlet of the second Venturi conveyor is connected with the combustion stabilizing inlet of the combustion stabilizer;
and a third air outlet of the wind-powder separator is connected with a combustion inlet of the combustor.
6. The combustion system of claim 5, further comprising a surge bin, wherein a surge inlet of the surge bin is connected to a powder outlet of the wind-powder separation device, and wherein a surge outlet of the surge bin is connected to a second powder inlet of the venturi conveyor.
7. The combustion system of claim 6, further comprising a pulverized coal feeder, wherein a feed inlet of the pulverized coal feeder is connected to the surge outlet of the surge bin, and wherein a feed outlet of the pulverized coal feeder is connected to the second inlet of the second venturi.
8. A boiler system, comprising:
a boiler body;
the combustion system as claimed in any one of claims 1-7, wherein a combustion unit of the combustion system is provided on the boiler body.
9. The boiler system according to claim 8, wherein the stabilizer is inserted within the burner, the burner further having a pulverized coal nozzle, an axis of the pulverized coal nozzle being collinear with an axis of the stabilizer.
10. The boiler system according to claim 8, wherein the number of the burners is four, the four burners are arranged in a tangential manner on the boiler body, the burner is arranged in parallel with the burner, and an included angle is formed between an axis of the burner and an axis of the pulverized coal nozzle.
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| CN202310754060.1A CN116608461A (en) | 2023-06-25 | 2023-06-25 | Combustion system and boiler system with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310754060.1A CN116608461A (en) | 2023-06-25 | 2023-06-25 | Combustion system and boiler system with same |
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| CN111594830A (en) * | 2020-05-20 | 2020-08-28 | 哈尔滨工业大学 | High-efficiency low-NOx double-vortex flow pulverized coal burner |
| CN113757644A (en) * | 2021-08-11 | 2021-12-07 | 山东英电环保科技有限公司 | Combined type combustion stabilizer with controllable concentration and separated coal powder concentration and dilution |
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| JPH08110014A (en) * | 1994-10-07 | 1996-04-30 | Babcock Hitachi Kk | Fine powder coal combustor |
| JP2001082705A (en) * | 1999-09-08 | 2001-03-30 | Mitsubishi Heavy Ind Ltd | Pulverized fuel combustion burner, boiler, and pulverized fuel combustion method |
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