CN111895394A - External heating smoke-heated type cyclone burner for low-load stable combustion pulverized coal and heating method - Google Patents

External heating smoke-heated type cyclone burner for low-load stable combustion pulverized coal and heating method Download PDF

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Publication number
CN111895394A
CN111895394A CN202010749510.4A CN202010749510A CN111895394A CN 111895394 A CN111895394 A CN 111895394A CN 202010749510 A CN202010749510 A CN 202010749510A CN 111895394 A CN111895394 A CN 111895394A
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CN
China
Prior art keywords
heating sleeve
smoke
heating
air channel
pulverized coal
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Pending
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CN202010749510.4A
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Chinese (zh)
Inventor
贾庚
王静杰
王明昊
李伟
庞振洲
左国华
翟胜兵
孙长鑫
刘建宏
王广猛
高维广
赵育松
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Harbin Boiler Co Ltd
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Harbin Boiler Co Ltd
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Priority to CN202010749510.4A priority Critical patent/CN111895394A/en
Publication of CN111895394A publication Critical patent/CN111895394A/en
Pending legal-status Critical Current

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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
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

The invention relates to an external heating smoke-heated type cyclone burner for low-load stable combustion pulverized coal and a heating method. The boiler side of the prior art has the main problems that under low load, the coal burning quantity in the boiler is low, the temperature of a hearth is low, and the combustion is unstable. The invention comprises the following components: cyclone burner, cyclone burner include central wind passageway (1), central wind passageway outer set up wind passageway (2), wind passageway left end be close to the position of spout and arrange surely fire tooth (13), the right-hand member links to each other with wind supply pipeline once, right half section skin of wind passageway once arrange heating sleeve pipe (4) and bellows (5) in proper order, the heating sleeve pipe left end by heating sleeve pipe end baffle (9) shutoff, heating sleeve pipe flue gas entry (3) are connected to the right-hand member upside, heating sleeve pipe exhanst gas outlet (15) are connected to its downside. The invention is used for the low-load stable-combustion pulverized coal external heating smoke-heated type cyclone burner.

Description

External heating smoke-heated type cyclone burner for low-load stable combustion pulverized coal and heating method
The technical field is as follows:
the invention relates to the technical field of power station boiler combustion equipment, in particular to a soot-heated type cyclone burner for low-load stable combustion of pulverized coal and a heating method.
Background art:
with the development of clean energy such as wind power, photovoltaic and the like being faster and faster, the installed scale is also rapidly increased, and the clean energy such as the wind power, the photovoltaic and the like provides a large amount of clean power, has the characteristics of intermittence, volatility, randomness, low reactive power supply performance, weak short-circuit current supply capacity and the like, cannot be completely absorbed by the power system in China, and brings great challenges to the safety and stability of the power system;
the national energy bureau requires that thermal power generating units are flexibly transformed, the potential deep peak regulation capacity of the thermal power generating units is released, the regulation capacity of a power system in China is improved, and the consumption of renewable energy is promoted. In order to alleviate the problem and improve the low-load stable combustion capability of the thermal power generating unit, a combustor suitable for stable combustion under the condition of low load of a boiler is urgently needed to be developed so as to meet the requirement of deep peak shaving of the coal-fired unit.
The invention content is as follows:
the invention aims to provide a soot-heated cyclone burner and a heating method for low-load stable-combustion pulverized coal external heating, which have extremely strong stable combustion capability and are convenient for heating quantity adjustment, and have wide application prospects in the aspect of thermal power flexibility improvement.
The above purpose is realized by the following technical scheme:
a kind of external heating smoke-heated type cyclone burner used for stable combustion coal dust of underload, it makes up and includes: cyclone burner, cyclone burner include central wind passageway, central wind passageway outer set up the wind passageway once, the wind passageway left end be close to the position of spout and arrange the steady tooth that fires, the right-hand member links to each other with a wind supply pipeline, the right half section skin of wind passageway once arrange heating sleeve and bellows in proper order, the heating sleeve left end blocked by heating sleeve tip baffle, the heating sleeve flue gas entry is connected to the right-hand member upside, heating sleeve exhanst gas outlet is connected to its downside, the heating sleeve inside sheltered from into tortuous passageway by heating sleeve flue gas baffle A, heating sleeve axial flue gas baffle, heating sleeve flue gas baffle B.
The cyclone burner is characterized in that the cyclone burner is used for heating smoke and heat outside low-load stable-combustion pulverized coal, the left end of the air box is provided with the right end of the secondary air channel, the tertiary air channel and the quartic air channel and is open, the left side of the secondary air channel is provided with a nozzle, the right side of the tertiary air channel is connected with the air box, the left side of the quartic air channel is provided with a conical nozzle, and the right side of the quartic air channel is connected with the air box.
The cyclone burner is characterized in that the cyclone burner is used for externally heating smoke and heat for low-load stable combustion pulverized coal, the central air channel, the primary air channel and the stable combustion teeth are made of wear-resistant heat-resistant alloy or ceramic, the secondary air pipeline, the tertiary air pipeline, the quartic air pipeline and the air box are connected in a welding mode, a flange connection mode and an integral casting mode, and the outer edge of the quartic air nozzle is provided with the conical nozzle.
A kind of external heating smoke-heated cyclone burner and heating method used for low-load stable burning coal dust, the method includes the following steps:
firstly, a heating sleeve is arranged between a primary air channel and an air box, hot flue gas can enter from a flue gas inlet of the heating sleeve on the upper side of the right end of the heating sleeve and flow out from a flue gas outlet of the heating sleeve on the lower side of the right end of the heating sleeve, and the heating sleeve can heat coal dust airflow in the primary air channel and air in the air box in the working process;
the interior of the heating sleeve is shielded by a heating sleeve smoke baffle A, a heating sleeve axial smoke baffle and a heating sleeve smoke baffle B to form a zigzag smoke channel, the smoke channel is divided into an upper part and a lower part by taking the heating sleeve axial smoke baffle as a boundary, the upper side is divided into a smoke inflow channel with the same flow direction as that of pulverized coal, and the lower side is a smoke backflow channel with the flow direction opposite to that of the pulverized coal, so that the hot smoke can flow in the heating sleeve more uniformly, and the short circuit phenomenon is avoided;
the left end of the heating sleeve is blocked by a heating sleeve end baffle, the distance of 5 times of the height of a smoke channel shell needs to be kept between the heating sleeve end baffle and right inlets of a secondary air channel, a tertiary air channel and a quartic air channel, and if the left end of the smoke channel shell adopts a slope structure and the inclination angle is not more than 45 degrees, the distance can be shortened by half, so that air in the air box can smoothly enter the secondary air channel;
the pulverized coal airflow in the primary air channel can be heated to the temperature close to the ignition point by controlling the flow of flue gas, so that the volatile components of the pulverized coal are separated out in the burner, the volatile components are easier to ignite than pulverized coal particles, the air in the air box has higher temperature at the moment, the ignition process of the pulverized coal when the pulverized coal is sprayed out of the nozzle on duty is more facilitated, the pulverized coal airflow can be very easy to ignite when entering the hearth, and the pulverized coal can be stably combusted even under the condition of very low load factor.
Has the advantages that:
1. the invention relates to a smoke-heated cyclone burner suitable for low-load stable combustion of pulverized coal and a heating method thereof.
The invention takes hot flue gas as a heating source, can be directly extracted from a proper place of the tail flue of the boiler, has good economical efficiency and saves cost.
The heating sleeve is internally shielded by the heating sleeve smoke baffle A, the heating sleeve axial smoke baffle and the heating sleeve smoke baffle B to form a zigzag smoke channel, so that the hot smoke can flow in the heating sleeve more uniformly, the short circuit phenomenon is avoided, and the heat of the smoke can be utilized more fully.
The invention can be connected with the solid fuel conveying pipeline in a flange connection or welding mode, can be in straight pipe connection or elbow connection, has wide application range and compact structure, and is convenient for installation, disassembly and operation maintenance of the combustor.
The structure of the invention can greatly improve the low-load stable combustion performance of the utility boiler, and the novel cyclone burner is characterized in that the air box is provided with the flue gas heating sleeve, hot flue gas is taken as a heat source, and the novel cyclone burner has the advantages of strong economy, cost saving and the like.
The heating sleeve simultaneously heats the coal dust airflow in the primary air channel and the air in the air box, improves the initial temperature of the coal dust and the air (secondary air, tertiary air and quartic air) entering the hearth, and ensures that the heat required by the ignition of the coal dust is lower, thereby having the capability of stable combustion.
The inner part of the flue gas heating sleeve is shielded into a zigzag flue gas channel by the flue gas baffle, so that the hot flue gas can uniformly flow in the heating sleeve, the short circuit phenomenon is avoided, the heating process is more uniform, a certain distance is kept between the end baffle of the heating sleeve and the right inlet of the second, third and fourth air channels, so that the air in the air box can smoothly enter the secondary air channel, and the central air channel, the primary air channel and the combustion stabilizing teeth are made of wear-resistant and heat-resistant alloy or ceramic, so that the normal operation of the combustor is ensured, and the overheating phenomenon cannot occur.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a sectional view a-a of fig. 1.
FIG. 4 is a schematic structural view of the heating jacket with the flue gas entering from top to bottom.
Fig. 5 is a top view of fig. 4.
Fig. 6 is a sectional view a-a of fig. 4.
FIG. 7 is a schematic view of the structure of the heating jacket with the flue gas entering from the bottom and exiting from the top.
Fig. 8 is a top view of fig. 7.
Fig. 9 is a sectional view a-a of fig. 7.
FIG. 10 is a schematic diagram of the structure of the heating jacket with the flue gas entering from left to right.
Fig. 11 is a bottom view of fig. 10.
Fig. 12 is a sectional view a-a of fig. 10.
FIG. 13 is a schematic diagram of the right-in and left-out structure of the heating jacket flue gas of the present application.
Fig. 14 is a bottom view of fig. 13.
Fig. 15 is a sectional view a-a of fig. 13.
Wherein: 1. the central air channel 2, the primary air channel 3, the heating sleeve flue gas inlet 4, the heating sleeve 5, the air box 6, the heating sleeve flue gas baffles A and 7, the heating sleeve axial flue gas baffle 8, the heating sleeve flue gas baffles B and 9, the heating sleeve end baffle 10, the secondary air channel 11, the tertiary air channel 12, the quaternary air channel 13, the stable combustion teeth 14, the conical nozzle 15 and the heating sleeve flue gas outlet.
The specific implementation mode is as follows:
example 1:
a kind of external heating smoke-heated type cyclone burner used for stable combustion coal dust of underload, it makes up and includes: cyclone burner, cyclone burner include central wind passageway 1, central wind passageway outer set up wind passageway 2 once, wind passageway left end be close to the position of spout and arrange surely to fire tooth 13, the right-hand member links to each other with a wind supply line, the right half section skin of wind passageway arrange heating sleeve 4 and bellows 5 in proper order, the heating sleeve left end blocked by heating sleeve tip baffle 9, heating sleeve flue gas entry 3 is connected to the right-hand member upside, heating sleeve exhanst gas outlet 15 is connected to its downside, the inside heating sleeve sheltered from into tortuous passageway by heating sleeve flue gas baffle A6, heating sleeve axial flue gas baffle 7, heating sleeve flue gas baffle B8 of heating sleeve.
Example 2:
according to embodiment 1, the cyclone burner for low-load stable combustion of pulverized coal and external heating smoke heat is characterized in that the right ends of a secondary air channel 10, a tertiary air channel 11 and a quaternary air channel 12 are arranged at the left end of an air box and are opened, the left sides of the secondary air channel and the tertiary air channel are nozzles, the right sides of the secondary air channel and the tertiary air channel are connected with the air box, a conical nozzle 14 is arranged at the left side of the quaternary air channel, and the right sides of the quaternary air channel and the air box are connected.
Example 3:
according to embodiment 2, the cyclone burner for low-load stable combustion of pulverized coal and external heating smoke heat type, the central air channel, the primary air channel and the stable combustion teeth are made of wear-resistant and heat-resistant alloy or ceramic, the secondary air pipeline, the tertiary air pipeline, the quaternary air pipeline and the air box are connected in a welding mode, a flange connection mode and an integral casting mode, and the outer edge of the quaternary air nozzle is provided with the conical nozzle.
Example 4:
the cyclone burner and the heating method for low-load stable combustion pulverized coal external heating smoke heating according to the embodiments 1-3 comprise the following steps:
firstly, a heating sleeve is arranged between a primary air channel and an air box, hot flue gas can enter from a flue gas inlet of the heating sleeve on the upper side of the right end of the heating sleeve and flow out from a flue gas outlet of the heating sleeve on the lower side of the right end of the heating sleeve, and the heating sleeve can heat coal dust airflow in the primary air channel and air in the air box in the working process;
the interior of the heating sleeve is shielded by a heating sleeve smoke baffle A, a heating sleeve axial smoke baffle and a heating sleeve smoke baffle B to form a zigzag smoke channel, the smoke channel is divided into an upper part and a lower part by taking the heating sleeve axial smoke baffle as a boundary, the upper side is divided into a smoke inflow channel with the same flow direction as that of pulverized coal, and the lower side is a smoke backflow channel with the flow direction opposite to that of the pulverized coal, so that the hot smoke can flow in the heating sleeve more uniformly, and the short circuit phenomenon is avoided;
the left end of the heating sleeve is blocked by a heating sleeve end baffle, the distance of 5 times of the height of a smoke channel shell needs to be kept between the heating sleeve end baffle and right inlets of a secondary air channel, a tertiary air channel and a quartic air channel, and if the left end of the smoke channel shell adopts a slope structure and the inclination angle is not more than 45 degrees, the distance can be shortened by half, so that air in the air box can smoothly enter the secondary air channel;
the coal dust airflow in the primary air channel can be heated to the temperature close to the ignition point by controlling the flow of the flue gas, so that the volatile components of the coal dust are separated out in the combustor, the volatile components are easier to ignite than coal dust particles, the air in the air box has higher temperature at the moment, the ignition process of the coal dust is more favorably finished when the coal dust is sprayed out of a nozzle on duty, the coal dust airflow can be very easy to ignite when entering a hearth, and the coal dust can be stably combusted even under the condition of low load factor;
the central air channel is positioned at the innermost layer of the whole burner, the left end of the central air channel is a nozzle, and the right end of the central air channel is connected with a pipeline for conveying central air; the primary air channel is positioned on the outer layer of the central air channel, the left end of the primary air channel is close to the spout, the combustion stabilizing teeth are arranged, and the right end of the primary air channel is connected with the primary air supply pipeline; the outer layer of the primary air channel is designed into two sections:
the outer layer of the left half section of the primary air channel is sequentially provided with a secondary air channel, a tertiary air channel and a quaternary air channel, and the outer layer of the right half section of the primary air channel is sequentially provided with a heating sleeve and an air box; the left end of the heating sleeve is blocked by a baffle at the end part of the heating sleeve, the upper side of the right end of the heating sleeve is connected with a flue gas inlet of the heating sleeve, and the lower side of the heating sleeve is connected with a flue gas outlet of the heating sleeve; the interior of the heating sleeve is shielded into a zigzag channel by a heating sleeve flue gas baffle A, a heating sleeve axial flue gas baffle and a heating sleeve flue gas baffle B; the left end of the air box is connected with the right ends of the secondary air channel, the tertiary air channel and the quaternary air channel, and the right end of the air box is open and can be directly connected with an air supply pipeline in engineering application; the left side of the secondary air channel is provided with a nozzle, and the right side of the secondary air channel is connected with an air box; the left side of the tertiary air channel is provided with a nozzle, and the right side of the tertiary air channel is connected with an air box; the left side of the four-time air channel is provided with a conical nozzle, and the right side of the four-time air channel is connected with an air box.
The heating sleeve is arranged between the primary air channel and the air box, and hot flue gas can enter from a flue gas inlet of the heating sleeve on the upper side of the right end of the heating sleeve and flow out from a flue gas outlet of the heating sleeve on the lower side of the right end of the heating sleeve, so that the heating sleeve can heat coal dust airflow in the primary air channel and air in the hot air box in the working process;
the interior of the heating sleeve is shielded by a heating sleeve smoke baffle A, a heating sleeve axial smoke baffle and a heating sleeve smoke baffle B to form a zigzag smoke channel, the smoke channel is divided into an upper part and a lower part by taking the heating sleeve axial smoke baffle as a boundary, the upper side is divided into a smoke incoming flow channel with a flow rectifying direction being the same as the flow direction of the pulverized coal, and the lower side is a smoke return channel with the flow rectifying direction being opposite to the flow direction of the pulverized coal, so that the hot smoke can flow in the heating sleeve more uniformly, and the short circuit phenomenon is avoided; and a certain distance is required to be kept between the right inlets of the secondary air channel, the tertiary air channel and the quartic air channel, so that air in the air box can smoothly enter the secondary air channel.
In the practical engineering application process, because the installation positions are different, the positions of the heating sleeve flue gas inlet and outlet are random, the invention is suitable for the positions of the flue gas inlet and outlet under all conditions, and the heating sleeve flue gas inlet and outlet in the upper direction, the lower direction, the upper direction, the left direction, the right direction and the left direction are exemplified by combining the attached drawings 1-3;
(1) in the case of up-in and down-out of the heating jacket flue gas, as shown in fig. 4-6, the hot flue gas inlet is disposed at the upper portion of the heating jacket pipe, and the outlet is disposed at the lower portion of the heating jacket pipe.
(2) In the case of heating jacket flue gas going in and out from the lower part, as shown in fig. 7-9, the hot flue gas inlet is located at the lower part of the heating jacket and the outlet is located at the upper part of the heating jacket.
(3) In the case of heating jacket flue gas left in and right out, as shown in fig. 10-12, the hot flue gas inlet is located on the left side of the heating jacket and the hot flue gas outlet is located on the right side of the heating jacket.
(4) In the case of right-in left-out heating jacket flue gas, as shown in fig. 13-15, the hot flue gas inlet is located on the right side of the heating jacket and the hot flue gas outlet is located on the left side of the heating jacket.

Claims (4)

1. A kind of external heating smoke-heated type cyclone burner used for stable combustion coal dust of underload, it makes up and includes: the cyclone burner is characterized in that: cyclone burner include central wind passageway, central wind passageway outer set up the wind passageway once, wind passageway left end be close to the position of spout and arrange surely to fire the tooth, the right-hand member links to each other with a wind supply pipeline, the right half section skin of wind passageway once arrange heating sleeve and bellows in proper order, heating sleeve left end by heating sleeve tip baffle shutoff, the heating sleeve flue gas entry is connected to the right-hand member upside, heating sleeve exhanst gas outlet is connected to its downside, heating sleeve inside sheltered from into tortuous passageway by heating sleeve flue gas baffle A, heating sleeve axial flue gas baffle, heating sleeve flue gas baffle B.
2. The cyclone burner for low-load stable-combustion pulverized coal external heating smoke as claimed in claim 1, which is characterized in that: the left end of the air box is provided with the right ends of the secondary air channel, the tertiary air channel and the quartic air channel and is open, the left side of the secondary air channel and the left side of the tertiary air channel are provided with the nozzles, the right side of the tertiary air channel is connected with the air box, the left side of the quartic air channel is provided with the conical nozzles, and the right side of the quartic air channel is connected with the air box.
3. The cyclone burner for low-load stable-combustion pulverized coal external heating smoke as claimed in claim 2, which is characterized in that: the central air channel, the primary air channel and the combustion stabilizing teeth are made of wear-resistant heat-resistant alloy or ceramic, the secondary air pipeline, the tertiary air pipeline, the quartic air pipeline and the air box are connected in a welding mode, a flange connection mode and an integral casting mode, and the outer edge of the quartic air nozzle is provided with the conical nozzle.
4. A heating method for a low-load stable-combustion pulverized coal external heating smoke thermal type cyclone burner as claimed in any one of claims 1 to 3, which is characterized in that: the method comprises the following steps:
firstly, a heating sleeve is arranged between a primary air channel and an air box, hot flue gas can enter from a flue gas inlet of the heating sleeve on the upper side of the right end of the heating sleeve and flow out from a flue gas outlet of the heating sleeve on the lower side of the right end of the heating sleeve, and the heating sleeve can heat coal dust airflow in the primary air channel and air in the air box in the working process;
the interior of the heating sleeve is shielded by a heating sleeve smoke baffle A, a heating sleeve axial smoke baffle and a heating sleeve smoke baffle B to form a zigzag smoke channel, the smoke channel is divided into an upper part and a lower part by taking the heating sleeve axial smoke baffle as a boundary, the upper side is divided into a smoke inflow channel with the same flow direction as that of pulverized coal, and the lower side is a smoke backflow channel with the flow direction opposite to that of the pulverized coal, so that the hot smoke can flow in the heating sleeve more uniformly, and the short circuit phenomenon is avoided;
the left end of the heating sleeve is blocked by a heating sleeve end baffle, the distance of 5 times of the height of a smoke channel shell needs to be kept between the heating sleeve end baffle and right inlets of a secondary air channel, a tertiary air channel and a quartic air channel, and if the left end of the smoke channel shell adopts a slope structure and the inclination angle is not more than 45 degrees, the distance can be shortened by half, so that air in the air box can smoothly enter the secondary air channel;
the pulverized coal airflow in the primary air channel can be heated to the temperature close to the ignition point by controlling the flow of flue gas, so that the volatile components of the pulverized coal are separated out in the burner, the volatile components are easier to ignite than pulverized coal particles, the air in the air box has higher temperature at the moment, the ignition process of the pulverized coal when the pulverized coal is sprayed out of the nozzle on duty is more facilitated, the pulverized coal airflow can be very easy to ignite when entering the hearth, and the pulverized coal can be stably combusted even under the condition of very low load factor.
CN202010749510.4A 2020-07-30 2020-07-30 External heating smoke-heated type cyclone burner for low-load stable combustion pulverized coal and heating method Pending CN111895394A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010749510.4A CN111895394A (en) 2020-07-30 2020-07-30 External heating smoke-heated type cyclone burner for low-load stable combustion pulverized coal and heating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010749510.4A CN111895394A (en) 2020-07-30 2020-07-30 External heating smoke-heated type cyclone burner for low-load stable combustion pulverized coal and heating method

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Publication Number Publication Date
CN111895394A true CN111895394A (en) 2020-11-06

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Application Number Title Priority Date Filing Date
CN202010749510.4A Pending CN111895394A (en) 2020-07-30 2020-07-30 External heating smoke-heated type cyclone burner for low-load stable combustion pulverized coal and heating method

Country Status (1)

Country Link
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