CN108826285B - Large regulating ratio coal powder burner - Google Patents
Large regulating ratio coal powder burner Download PDFInfo
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- CN108826285B CN108826285B CN201810559015.XA CN201810559015A CN108826285B CN 108826285 B CN108826285 B CN 108826285B CN 201810559015 A CN201810559015 A CN 201810559015A CN 108826285 B CN108826285 B CN 108826285B
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- ignition
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- pulverized coal
- wall
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- 239000003245 coal Substances 0.000 title claims abstract description 94
- 239000000843 powder Substances 0.000 title description 4
- 230000001105 regulatory effect Effects 0.000 title description 2
- 238000002485 combustion reaction Methods 0.000 claims abstract description 138
- 239000000446 fuel Substances 0.000 claims abstract description 54
- 238000009423 ventilation Methods 0.000 claims abstract description 35
- 239000011229 interlayer Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009991 scouring 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
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/04—Heating fuel prior to delivery to combustion apparatus
-
- 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
-
- 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
- F23L15/00—Heating of air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2900/00—Special features of, or arrangements for fuel supplies
- F23K2900/01041—Heating by using exhaust gas heat
-
- 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
- F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
- F23L2900/15043—Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a pulverized coal burner with a large regulation ratio, which comprises a burner body, wherein a combustion cavity is arranged in an inner cavity of the burner body, an ignition combustion cylinder is arranged in the combustion cavity, two ends of the ignition combustion cylinder are communicated with the inner cavity of the combustion cavity, a first ventilation ring cavity is arranged between the outer wall of the ignition combustion cylinder and the inner cavity wall of the combustion cavity, and an ignition combustion air inlet is communicated with the ignition combustion cylinder through the first ventilation ring cavity; a second ventilation ring cavity is arranged between the outer wall of the combustion cavity and the inner cavity wall of the burner body, and the main pulverized coal fuel inlet is communicated with the combustion chamber through the second ventilation ring cavity. The arrangement of the first ventilation ring cavity and the second ventilation ring cavity preheats the introduced combustion-supporting air and the pulverized coal, ensures the stability and the combustion sufficiency of pulverized coal combustion, ensures that the large adjustment ratio pulverized coal burner can resist the instability caused by burner adjustment, has larger burner adjustment ratio and does not need auxiliary fuel.
Description
Technical Field
The invention relates to the technical field of burners, in particular to a coal powder burner with a large adjustment ratio.
Background
The pulverized coal burner is equipment capable of fully burning pulverized coal in a short time and generating high-temperature vortex. The pulverized coal burner comprises a pulverized coal burner special for a rotary kiln, a pulverized coal burner for a boiler and a pulverized coal burner special for an asphalt mixing station according to purposes. The adjustment ratio of the pulverized coal burner is the ratio of the maximum output power to the minimum output power of the pulverized coal burner without adding auxiliary fuel. The adjustment ratio of the existing pulverized coal burner is generally 1.8-2.5.
The prior art generally adopts a method of adding an ignition device or adding auxiliary fuel if the adjustment ratio of the pulverized coal burner is expected to be improved. For example, the pulverized coal burner equipped with the plasma ignition device can improve the turndown ratio, but the cathode material of the plasma ignition device has very short service life and cannot be used for a long time. For example, pulverized coal burners equipped with a micro-oil ignition device can also increase the turndown ratio, but have large fuel consumption and high running cost.
In view of the foregoing, it is an urgent need for a person skilled in the art to provide a pulverized coal burner that can increase the adjustment range without adding auxiliary fuel and without adding an ignition device.
Disclosure of Invention
The invention aims to provide a pulverized coal burner with a large adjustment ratio, which solves the problems in the prior art, so that the pulverized coal burner can improve the adjustment range without adding auxiliary fuel and adding an ignition device.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a pulverized coal burner with a large regulation ratio, which comprises a burner body, wherein a combustion cavity is arranged in an inner cavity of the burner body, an ignition combustion cylinder is arranged in the combustion cavity, two ends of the ignition combustion cylinder are communicated with the inner cavity of the combustion cavity, a first ventilation ring cavity is arranged between the outer wall of the ignition combustion cylinder and the inner cavity wall of the combustion cavity, a second ventilation ring cavity is arranged between the outer wall of the combustion cavity and the inner cavity wall of the burner body, and an ignition combustion-supporting air inlet is arranged above the combustion cavity and is communicated with the ignition combustion cylinder through the first ventilation ring cavity; the left end of the combustion cavity is connected with an ignition pulverized coal fuel inlet, the ignition pulverized coal fuel inlet is communicated with the inner cavity of the combustion cavity, an ignition gun is arranged in the combustion cavity, a muzzle of the ignition gun is positioned in the ignition combustion cylinder, a main pulverized coal fuel inlet is arranged below the burner body, the main pulverized coal fuel inlet is communicated with a combustion chamber through the second ventilation ring cavity, and the combustion chamber is positioned at the outlet position of the ignition combustion cylinder; the secondary air inlet is arranged on the secondary air box and communicated with the combustion chamber.
Preferably, an ignition gun support is fixedly connected to the inner wall of the combustion cavity, which is close to the ignition pulverized coal fuel inlet, and the ignition gun is fixedly connected to the ignition gun support.
Preferably, the left end of the combustion cavity extends out of the burner body, and the ignition combustion-supporting air inlet and the ignition pulverized coal fuel inlet are both positioned outside the burner body.
Preferably, the wall of the combustion cavity is an interlayer wall, the interlayer wall comprises an interlayer inner wall and an interlayer outer wall, a third gas-passing ring cavity is formed between the interlayer inner wall and the interlayer outer wall, a through hole is formed in one end, far away from the ignition pulverized coal fuel inlet, of the interlayer inner wall, the through hole is communicated with the third gas-passing ring cavity and the first gas-passing ring cavity, and the ignition combustion-supporting air inlet is communicated with the third gas-passing ring cavity.
Preferably, a flow equalizer is arranged between the ignition pulverized coal fuel inlet and the combustion cavity.
Preferably, a crack is arranged between the inner wall of the overgrate air bellows and the outer wall of the burner body, and overgrate air swirl vanes are arranged in the crack.
Preferably, an end flange is arranged at the end of the secondary air box, and the end flange is connected with a flange fixedly connected to the outer wall of the burner body through bolts.
Preferably, a thermocouple is arranged in the first ventilation ring cavity.
Preferably, a plurality of supporting protruding blocks are respectively arranged at two ends of the outer wall of the ignition combustion cylinder, the outer surfaces of the supporting protruding blocks are fixedly connected to the inner surface of the combustion cavity, an air inlet channel is reserved among the supporting protruding blocks, and the air inlet channel is a communication channel between the first air-through ring cavity and the ignition combustion cylinder.
Preferably, the ignition combustion cylinder is made of ceramic or silicon carbide, and the length of the ignition combustion cylinder is L, the unit is m, and the requirement of L=C is met 1 ·Q/A 1 Wherein C 1 Is constant and takes the value of 3.28 to 4.92 multiplied by 10 -4 Q is the total flow of ignition pulverized coal fuel air supply and ignition combustion-supporting air, and the unit is m 3 /h，A 1 The unit of the cross section area of the ignition combustion cylinder is m 2 The method comprises the steps of carrying out a first treatment on the surface of the The cross section area of the ignition combustion cylinder outlet is A 2 In m 2 ，A 2 ＝C 2 ·A 1 Wherein C 2 The constant is 0.6 to 0.8.
Compared with the prior art, the invention has the following technical effects:
the invention provides a pulverized coal burner with a large regulation ratio, wherein a first ventilation ring cavity is arranged between the outer wall of an ignition combustion cylinder and the inner cavity wall of a combustion cavity, and an ignition combustion-supporting air inlet is communicated with the ignition combustion cylinder through the first ventilation ring cavity; a second ventilation ring cavity is arranged between the outer wall of the combustion cavity and the inner cavity wall of the burner body, and the main pulverized coal fuel inlet is communicated with the combustion chamber through the second ventilation ring cavity. The arrangement of the first ventilation ring cavity not only can radiate heat for the device and prolong the service life of the device, but also can preheat the introduced ignition combustion-supporting air, thereby ensuring the stability and the combustion sufficiency of the ignition pulverized coal combustion. The second ventilation ring cavity preheats main pulverized coal fuel passing through the second ventilation ring cavity, so that the combustion stability and the combustion sufficiency of the main pulverized coal are improved; the high turndown ratio pulverized coal burner can resist instability caused by burner adjustment, allows the burner to be arbitrarily adjusted within the load range of 10% -100%, and does not need auxiliary fuel in wide-range adjustment operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a large turndown ratio pulverized coal burner of the present invention;
FIG. 2 is a cross-sectional view of a large turndown ratio pulverized coal burner B-B of the present invention;
FIG. 3 is an enlarged schematic view of the structure of the A part of the pulverized coal burner with large turndown ratio;
wherein, 1 is the combustor body, 2 is ignition pulverized coal fuel inlet, 3 is the flow equalizer, 4 is ignition combustion-supporting wind inlet, 5 is main pulverized coal fuel inlet, 6 is overgrate air bellows, 7 is overgrate air inlet, 8 is the ignition rifle, 9 is the ignition rifle support, 10 is the ignition combustion section of thick bamboo, 101 is the support lug, 11 is overgrate air swirl vane, 12 is the thermocouple, 13 is the combustion chamber, and 131 is the through-hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a pulverized coal burner with a large adjustment ratio, which solves the problems in the prior art, and ensures that the pulverized coal burner can improve the adjustment range without adding auxiliary fuel and adding an ignition device.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-3, the invention provides a pulverized coal burner with a large regulation ratio, which comprises a burner body 1, wherein a combustion cavity 13 is arranged in an inner cavity of the burner body 1, an ignition combustion cylinder 10 is arranged in the combustion cavity 13, two ends of the ignition combustion cylinder 10 are communicated with the inner cavity of the combustion cavity 13, a first ventilation ring cavity is arranged between the outer wall of the ignition combustion cylinder 10 and the inner cavity wall of the combustion cavity 13, a second ventilation ring cavity is arranged between the outer wall of the combustion cavity 13 and the inner cavity wall of the burner body 1, an ignition combustion-supporting air inlet 4 is arranged above the combustion cavity 13, and the ignition combustion-supporting air inlet 4 is communicated with the ignition combustion cylinder 10 through the first ventilation ring cavity. The left end of the combustion cavity 13 is connected with the ignition pulverized coal fuel inlet 2, the ignition pulverized coal fuel inlet 2 is communicated with the inner cavity of the combustion cavity 13, an ignition gun 8 is arranged in the combustion cavity 13, a muzzle of the ignition gun 8 is positioned in the ignition combustion cylinder 10, a main pulverized coal fuel inlet 5 is arranged below the combustor body 1, and the main pulverized coal fuel inlet 5 is communicated with the combustion chamber through the second ventilation ring cavity. The burner body 1 is connected with a secondary air box 6, a secondary air inlet 7 is arranged on the secondary air box 6, and the secondary air inlet 7 is communicated with the combustion chamber. The combustion chamber is located at the outlet of the ignition combustion can 10. The ignition combustion cylinder 10 is a combustion space for igniting pulverized coal fuel, ensures stable combustion of the ignition pulverized coal fuel and ignition combustion-supporting air, and improves burnout rate. The ignition combustion-supporting air enters the ignition combustion cylinder 10 through the first ventilation ring cavity to participate in combustion; the arrangement of the first ventilation ring cavity not only can radiate heat for the device and prolong the service life of the device, but also can preheat the introduced ignition combustion-supporting air, thereby ensuring the stability and the combustion sufficiency of pulverized coal combustion. The second ventilation ring cavity preheats main pulverized coal fuel passing through the second ventilation ring cavity, so that the stability and the combustion sufficiency of the main pulverized coal combustion are improved.
The inner wall of the combustion cavity 13, which is close to the ignition pulverized coal fuel inlet 2, is fixedly connected with an ignition gun support 9, and the ignition gun 8 is fixedly connected to the ignition gun support 9. The ignition gun 8 is an ignition oil gun or an ignition air gun. The ignition gun support 9 fixes the ignition gun 8 in the middle of the combustion chamber so that the ignition gun 8 can be replaced very conveniently.
The left end of the combustion cavity 13 extends out of the burner body 1, and the ignition combustion-supporting air inlet 4 and the ignition pulverized coal fuel inlet 2 are positioned outside the burner body 1.
The body wall of the combustion cavity 13 is an interlayer wall, the interlayer wall comprises an interlayer inner wall and an interlayer outer wall, a third air-through ring cavity is formed between the interlayer inner wall and the interlayer outer wall, a through hole 131 is formed in one end, far away from the ignition pulverized coal fuel inlet 2, of the interlayer inner wall, the through hole 131 is communicated with the third air-through ring cavity and the first air-through ring cavity, and the ignition combustion-supporting air inlet 4 is communicated with the third air-through ring cavity. The ignition combustion-supporting air is preheated in the third ventilation ring cavity, enters the first ventilation ring cavity through the through hole 131, is further preheated in the first ventilation ring cavity, and then enters the ignition combustion cylinder 10 for combustion, so that the stability of pulverized coal combustion is improved.
A flow equalizer 3 is arranged between the ignition pulverized coal fuel inlet 2 and the combustion cavity 13. The flow equalizer 3 makes the ignition pulverized coal fuel uniformly enter the ignition combustion cylinder 10 to participate in combustion.
A crack is arranged between the inner wall of the overgrate air bellow 6 and the outer wall of the burner body 1, and overgrate air swirl vanes 11 are arranged in the crack. The secondary air passes through the crack, and the secondary air swirl vanes 11 in the crack enable the secondary air to rotate to enter the combustion chamber, so that the mixing and combustion effects of the secondary air and the main pulverized coal fuel are improved.
The end of the secondary air box 6 is provided with an end flange which is connected with a flange fixedly connected to the outer wall of the burner body 1 by bolts. The secondary air swirl vanes 11 are convenient to overhaul and replace.
A thermocouple 12 is arranged in the first ventilation ring cavity. The thermocouple 12 is used to detect the temperature outside the ignition combustion can 10.
The two ends of the outer wall of the ignition combustion cylinder 10 are respectively provided with a plurality of supporting lugs 101, the outer surfaces of the supporting lugs 101 are fixedly connected to the inner surface of the combustion cavity 13, air inlet channels are reserved among the supporting lugs 101, and the air inlet channels are communication channels between the first air-through ring cavity and the inner cavity of the ignition combustion cylinder 10.
The ignition combustion cylinder 10 is made of ceramic or silicon carbide, and is high-temperature resistant and scouring resistant. The length of the ignition combustion cylinder 10 is L, the unit is m, l=c 1 ·Q/A 1 Wherein C 1 Is constant and takes the value of 3.28 to 4.92 multiplied by 10 -4 Q is the total flow of ignition pulverized coal fuel air supply and ignition combustion-supporting air, and the unit is m 3 /h，A 1 To ignite the cross-sectional area of the combustion bowl 10, the unit is m 2 The method comprises the steps of carrying out a first treatment on the surface of the The cross-sectional area of the outlet of the ignition combustion cylinder 10 is A 2 In m 2 ，A 2 ＝C 2 ·A 1 Wherein C 2 The constant is 0.6 to 0.8.
When the burner needs to be started, the fuel oil (or fuel gas) injected by the ignition gun 8 is firstly ignited, and the ignition combustion cylinder 10 is preheated; when the detected temperature of the thermocouple 12 reaches 600-800 ℃, starting to introduce ignition pulverized coal fuel; when the detected temperature of the thermocouple 12 reaches 700-850 ℃, the ignition fuel oil (or gas) is cut off.
The ignition pulverized coal fuel enters the preheated ignition combustion cylinder 10 from the ignition pulverized coal fuel inlet 2, is mixed with the preheated ignition combustion-supporting air and starts to burn; the ignition pulverized coal fuel and the combustion-supporting air have sufficient residence time in the ignition combustion cylinder 10 with higher temperature, and the stable and complete combustion of the pulverized coal can be ensured. The high-temperature flue gas after combustion is sprayed out from the nozzle of the ignition combustion cylinder 10 along with the partially combusted pulverized coal, and the mixture of the main pulverized coal fuel and the secondary air is ignited. The main pulverized coal fuel accounts for 90% of the total fuel of the pulverized coal burner, and can be randomly adjusted from 0% to 90% according to load requirements. Therefore, the large turndown ratio pulverized coal burner of the invention can resist instability caused by burner turndown, allows the burner to be arbitrarily adjusted within the load range of 10% -100%, and does not need auxiliary fuel at all in wide-range turndown operation. The invention relates to a coal powder burner with large regulation ratio, which has the regulation ratio of 10-12 under the premise of not adding auxiliary fuel.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (10)
1. The utility model provides a big turndown ratio pulverized coal burner, includes combustor body, its characterized in that: the combustion device comprises a burner body, and is characterized in that a combustion cavity is arranged in an inner cavity of the burner body, an ignition combustion cylinder is arranged in the combustion cavity, two ends of the ignition combustion cylinder are communicated with the inner cavity of the combustion cavity, a first ventilation ring cavity is arranged between the outer wall of the ignition combustion cylinder and the inner cavity wall of the combustion cavity, a second ventilation ring cavity is arranged between the outer wall of the combustion cavity and the inner cavity wall of the burner body, an ignition combustion-supporting air inlet is arranged above the combustion cavity, and the ignition combustion-supporting air inlet is communicated with the ignition combustion cylinder through the first ventilation ring cavity;
the left end of the combustion cavity is connected with an ignition pulverized coal fuel inlet, the ignition pulverized coal fuel inlet is communicated with the inner cavity of the combustion cavity, an ignition gun is arranged in the combustion cavity, a muzzle of the ignition gun is positioned in the ignition combustion cylinder, a main pulverized coal fuel inlet is arranged below the burner body, the main pulverized coal fuel inlet is communicated with a combustion chamber through the second ventilation ring cavity, and the combustion chamber is positioned at the outlet position of the ignition combustion cylinder;
the secondary air inlet is arranged on the secondary air box and communicated with the combustion chamber.
2. The large turndown ratio pulverized coal burner as set forth in claim 1, wherein: the combustion cavity is close to the ignition gun support fixedly connected to the inner wall of the ignition pulverized coal fuel inlet, and the ignition gun is fixedly connected to the ignition gun support.
3. The large turndown ratio pulverized coal burner as set forth in claim 1, wherein: the left end of the combustion cavity extends out of the burner body, and the ignition combustion-supporting air inlet and the ignition pulverized coal fuel inlet are both positioned outside the burner body.
4. A large turndown ratio pulverized coal burner as claimed in claim 3, characterized in that: the wall of the combustion cavity is an interlayer wall, the interlayer wall comprises an interlayer inner wall and an interlayer outer wall, a third gas-passing ring cavity is formed between the interlayer inner wall and the interlayer outer wall, a through hole is formed in one end, far away from the ignition pulverized coal fuel inlet, of the interlayer inner wall, the through hole is communicated with the third gas-passing ring cavity and the first gas-passing ring cavity, and the ignition combustion-supporting air inlet is communicated with the third gas-passing ring cavity.
5. The large turndown ratio pulverized coal burner as set forth in claim 1, wherein: and a flow equalizer is arranged between the ignition pulverized coal fuel inlet and the combustion cavity.
6. The large turndown ratio pulverized coal burner as set forth in claim 1, wherein: and a crack is formed between the inner wall of the overgrate air bellow and the outer wall of the burner body, and overgrate air swirl vanes are arranged in the crack.
7. The high turndown ratio pulverized coal burner as recited in claim 6 wherein: the end part of the secondary air box is provided with an end part flange, and the end part flange is fixedly connected with a flange on the outer wall of the burner body through bolts.
8. The large turndown ratio pulverized coal burner as set forth in claim 1, wherein: a thermocouple is arranged in the first ventilation ring cavity.
9. The large turndown ratio pulverized coal burner as set forth in claim 1, wherein: the ignition combustion cylinder comprises an ignition combustion cylinder body and is characterized in that a plurality of supporting protruding blocks are respectively arranged at two ends of the outer wall of the ignition combustion cylinder body, the outer surfaces of the supporting protruding blocks are fixedly connected to the inner surface of the combustion cavity body, an air inlet channel is reserved between the supporting protruding blocks, and the air inlet channel is a communication channel between the first air-through ring cavity and the ignition combustion cylinder body.
10. The large turndown ratio pulverized coal burner as set forth in claim 1, wherein: the ignition combustion cylinder is made of ceramic or silicon carbide, the length of the ignition combustion cylinder is L, the unit is m, and the condition that L=C is met 1 ·Q/A 1 Wherein C 1 Is constant and takes the value of 3.28 to 4.92 multiplied by 10 -4 Q is the total flow of ignition pulverized coal fuel air supply and ignition combustion-supporting air, and the unit is m 3 /h，A 1 The unit of the cross section area of the ignition combustion cylinder is m 2 The method comprises the steps of carrying out a first treatment on the surface of the The cross section area of the ignition combustion cylinder outlet is A 2 In m 2 ，A 2 ＝C 2 ·A 1 Wherein C 2 The constant is 0.6 to 0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810559015.XA CN108826285B (en) | 2018-06-01 | 2018-06-01 | Large regulating ratio coal powder burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810559015.XA CN108826285B (en) | 2018-06-01 | 2018-06-01 | Large regulating ratio coal powder burner |
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| Publication Number | Publication Date |
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| CN108826285A CN108826285A (en) | 2018-11-16 |
| CN108826285B true CN108826285B (en) | 2023-11-03 |
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| CN201810559015.XA Active CN108826285B (en) | 2018-06-01 | 2018-06-01 | Large regulating ratio coal powder burner |
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| CN111023148B (en) * | 2020-01-14 | 2024-06-07 | 薛芳 | Adjustable screw type multi-stage oil-free coal powder igniter |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1749616A1 (en) * | 1990-11-30 | 1992-07-23 | Западный филиал Всесоюзного теплотехнического научно-исследовательского института им.Ф.Э.Дзержинского | Method of burning pulverulent fuel |
| CN1155052A (en) * | 1996-11-18 | 1997-07-23 | 浙江大学 | Wide-regulatior-ratio multiple-coal-kind thick-thin-phase coal powder cyclone burner |
| JP2001263630A (en) * | 2000-03-15 | 2001-09-26 | Daiichi Tekko Seisakusho:Kk | Structure of reverse combustion far infrared incinerator and structure and material of far infrared ceramic combustor |
| CN2835825Y (en) * | 2005-10-27 | 2006-11-08 | 项昌柱 | Enhanced low-frequency acoustic wave ash blower |
| CN2854368Y (en) * | 2005-12-23 | 2007-01-03 | 郭秀峰 | Micro-oil ignition burner for multiple type of coal |
| CN200968599Y (en) * | 2006-11-07 | 2007-10-31 | 北京科技大学 | Low-polluting and self-prewarming powdered coal burner |
| CN101251264A (en) * | 2008-03-27 | 2008-08-27 | 烟台海融电力技术有限公司 | Two-stage flame generator |
| CN101725969A (en) * | 2010-01-19 | 2010-06-09 | 中国计量学院 | Low-NOx pulverized coal burner |
| CN201680364U (en) * | 2010-04-06 | 2010-12-22 | 山西蓝天环保设备有限公司 | Efficient low NOx pulverized coal burner for small and medium-sized industrial boilers |
| CN102679338A (en) * | 2012-05-30 | 2012-09-19 | 山西蓝天环保设备有限公司 | Efficient coal dust combustor for reducing smoke NOx content |
| CN103615717A (en) * | 2013-10-24 | 2014-03-05 | 中国计量学院 | Novel oxygen enrichment tiny-oil ignition and ultralow load stable-combustion combustor |
| CN103697469A (en) * | 2013-11-20 | 2014-04-02 | 西安交通大学 | Pulverized coal flame preheating low NOx burner system |
| CN105650631A (en) * | 2016-03-09 | 2016-06-08 | 南阳市亚龙筑路机械制造有限公司 | Energy-saved and environment-friendly pulverized coal combustion device |
| CN208382142U (en) * | 2018-06-01 | 2019-01-15 | 山西瓦特网联环能科技有限公司 | Big adjust compares coal burner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2597367A4 (en) * | 2011-05-27 | 2014-10-29 | Shanghai Boiler Works Ltd | Dense-phase swirl pulverized coal burner |
-
2018
- 2018-06-01 CN CN201810559015.XA patent/CN108826285B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1749616A1 (en) * | 1990-11-30 | 1992-07-23 | Западный филиал Всесоюзного теплотехнического научно-исследовательского института им.Ф.Э.Дзержинского | Method of burning pulverulent fuel |
| CN1155052A (en) * | 1996-11-18 | 1997-07-23 | 浙江大学 | Wide-regulatior-ratio multiple-coal-kind thick-thin-phase coal powder cyclone burner |
| JP2001263630A (en) * | 2000-03-15 | 2001-09-26 | Daiichi Tekko Seisakusho:Kk | Structure of reverse combustion far infrared incinerator and structure and material of far infrared ceramic combustor |
| CN2835825Y (en) * | 2005-10-27 | 2006-11-08 | 项昌柱 | Enhanced low-frequency acoustic wave ash blower |
| CN2854368Y (en) * | 2005-12-23 | 2007-01-03 | 郭秀峰 | Micro-oil ignition burner for multiple type of coal |
| CN200968599Y (en) * | 2006-11-07 | 2007-10-31 | 北京科技大学 | Low-polluting and self-prewarming powdered coal burner |
| CN101251264A (en) * | 2008-03-27 | 2008-08-27 | 烟台海融电力技术有限公司 | Two-stage flame generator |
| CN101725969A (en) * | 2010-01-19 | 2010-06-09 | 中国计量学院 | Low-NOx pulverized coal burner |
| CN201680364U (en) * | 2010-04-06 | 2010-12-22 | 山西蓝天环保设备有限公司 | Efficient low NOx pulverized coal burner for small and medium-sized industrial boilers |
| CN102679338A (en) * | 2012-05-30 | 2012-09-19 | 山西蓝天环保设备有限公司 | Efficient coal dust combustor for reducing smoke NOx content |
| CN103615717A (en) * | 2013-10-24 | 2014-03-05 | 中国计量学院 | Novel oxygen enrichment tiny-oil ignition and ultralow load stable-combustion combustor |
| CN103697469A (en) * | 2013-11-20 | 2014-04-02 | 西安交通大学 | Pulverized coal flame preheating low NOx burner system |
| CN105650631A (en) * | 2016-03-09 | 2016-06-08 | 南阳市亚龙筑路机械制造有限公司 | Energy-saved and environment-friendly pulverized coal combustion device |
| CN208382142U (en) * | 2018-06-01 | 2019-01-15 | 山西瓦特网联环能科技有限公司 | Big adjust compares coal burner |
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