CN110043920B - Device for ignition and combustion supporting of boiler - Google Patents

Device for ignition and combustion supporting of boiler Download PDF

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Publication number
CN110043920B
CN110043920B CN201910264158.2A CN201910264158A CN110043920B CN 110043920 B CN110043920 B CN 110043920B CN 201910264158 A CN201910264158 A CN 201910264158A CN 110043920 B CN110043920 B CN 110043920B
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China
Prior art keywords
supporting
ignition
ignition combustion
combustion
oxygen
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CN201910264158.2A
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CN110043920A (en
Inventor
倪培林
李立东
张明朝
孙景福
杨伟宏
周亦平
张智
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Datang Dongying Power Generation Co Ltd
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Datang Dongying Power Generation Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/60—Devices for simultaneous control of gas and combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/06—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs structurally associated with fluid-fuel burners
    • F23Q7/10—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs structurally associated with fluid-fuel burners for gaseous fuel, e.g. in welding appliances
    • F23Q7/12—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs structurally associated with fluid-fuel burners for gaseous fuel, e.g. in welding appliances actuated by gas-controlling device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/22—Details
    • F23Q7/24—Safety arrangements

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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 discloses a device for igniting and supporting combustion of a boiler, wherein the device for igniting and supporting combustion is arranged on a central axis of an inner cavity of a boiler body and consists of a base, an ignition and combustion-supporting spray head and a bracket, one end of the bracket is fixedly connected at four corners of the inner wall of the boiler body, the other end of the bracket is fixedly connected with the base, the base is positioned below a horizontal plane formed by spray nozzles of a burner, the outer wall of the base is fixedly connected with four ignition and combustion-supporting spray heads, the spray nozzles of the ignition and combustion-supporting spray heads respectively face the spray nozzles of the burner, and a natural gas and oxygen input pipeline and an igniter for igniting mixed gas formed by oxygen and natural gas are arranged in the ignition; the ignition combustion-supporting nozzle sprays flame formed by ignition to the pulverized coal airflow to finish ignition, and combustion can be assisted by spraying oxygen to the pulverized coal airflow, and heat generated in the ignition and combustion-supporting processes is completely used for heating steam, so that the utilization rate of energy is improved.

Description

Device for ignition and combustion supporting of boiler
Technical Field
The invention relates to the technical field of boiler ignition and combustion supporting, in particular to a device for boiler ignition and combustion supporting.
Background
Thermal power generation is a power generation method which utilizes heat energy generated by combustible materials during combustion and converts the heat energy into electric energy through a power generation power device. Because of the abundant coal resources in China, thermal power generation is still an important power generation mode. A thermal power plant is a power facility for generating power by using thermal energy released by combustion of fossil fuel, and includes all devices, apparatuses, and instrument devices for fuel combustion heat release and thermal-to-electric energy conversion and electric energy output, as well as buildings, structures, and all auxiliary facilities related to production and life, which are installed at specific sites for this purpose, and mainly includes several types of steam power plants, gas turbine power plants, and internal combustion engine power plants. The task of a boiler plant, which is one of the main thermal plants in a thermal power plant, is to convert chemical energy into thermal energy by combustion of a fuel and to heat the water with this thermal energy into steam of a certain quantity and quality (pressure and temperature). One of the most important components in a boiler system is the burner, from which the functions to be performed can be divided into five major systems: air supply system, ignition system, monitoring system, fuel system, electrical system. The ignition system mainly ignites the pulverized coal airflow of the main burner when the boiler is started; in addition, when the temperature of the boiler is reduced to endanger the stability of pulverized coal ignition and the flame in the boiler pulsates to cause flameout, the ignition system is also used for stabilizing combustion or used as an auxiliary combustion device.
However, the boiler ignition and combustion supporting devices used in the prior art have a number of drawbacks, such as:
at present, the commonly used burners are positioned at four corners or wall bodies of a boiler body and are used for spraying fuel and air into the boiler at a certain speed so that the fuel and the air can be well mixed in the boiler to ensure that the fuel is ignited in time and is rapidly and completely combusted. The ignition system is arranged in the combustor, when the boiler is started to ignite, an igniter such as a spark plug is adopted to ignite the mixture of the combustion-supporting oil or natural gas and the combustion-supporting gas and spray the mixture to the mixture of the pulverized coal and the combustion-supporting gas, so that the effect of igniting the pulverized coal airflow sprayed by the combustor is achieved; when the temperature of the boiler is reduced to endanger the ignition stability of pulverized coal and flame in the boiler pulsates to cause flameout danger, the ignition system assists combustion by injecting combustion-supporting gas. When the ignition and combustion-supporting mode is adopted, the relative concentration of the combustion-supporting gas at the nozzle of the ignition system in the combustor is the highest, so that the combustion efficiency of the fuel at the position is also the highest, but the high combustion energy generated at the position cannot be fully utilized in the hearth for heating steam.
Disclosure of Invention
The present invention aims to provide a device for igniting and supporting combustion of a boiler, which solves the problems set forth in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a device for boiler ignition and combustion supporting comprises a boiler body and burners, wherein the wall body of the boiler body is fixedly provided with four burners, the projections of extension lines of the inner wall of the boiler body, which penetrate through the nozzles, on the horizontal plane are tangent to the same circle, the burners are internally provided with ignition combustion supporting devices, the ignition combustion supporting devices are arranged on the central axis of the inner cavity of the boiler body and consist of a base, ignition combustion supporting nozzles and a support, one end of the support is fixedly connected to the four corners of the inner wall of the boiler body, the other end of the support is fixedly connected with the base, the base is positioned below the horizontal plane formed by the nozzles of the burners, the outer wall of the base is fixedly connected with the four ignition combustion supporting nozzles, and the nozzles of the ignition combustion supporting nozzles face the nozzle directions of the burners respectively, and a natural gas and oxygen input pipeline and an igniter for igniting mixed gas formed by oxygen and natural gas are arranged in the ignition combustion-supporting spray head.
Preferably, the base is in an inverted frustum shape, the bottom end of the ignition combustion-supporting nozzle outer wall is tangent to the base outer wall, the ignition combustion-supporting nozzle is fixedly connected with the base at the tangent position, the ignition combustion-supporting nozzle is provided with an elevation angle, and a nozzle extension line of the ignition combustion-supporting nozzle is close to an extension line of a burner nozzle and intersects at the burner nozzle.
Preferably, the support is of a cavity structure, an oxygen input pipe, a natural gas input pipe and a cable are sleeved in the cavity structure, and an oxygen pipeline connected with an output end of the oxygen input pipe and connected with the ignition combustion-supporting spray head and a natural gas pipeline connected with an output end of the natural gas input pipe and connected with the ignition combustion-supporting spray head are arranged in the base.
Preferably, the top fixedly connected with of the combustion-supporting nozzle of igniteing has a plurality of combustion-supporting spray needles of igniteing, the combustion-supporting spray needle of igniteing is formed by the combination of two cylinder cavities that external diameter and internal diameter are all inequality, and the cylinder cavity that external diameter and internal diameter are less is located the top portion of the combustion-supporting spray needle of igniteing, the top inner chamber of the combustion-supporting spray needle of igniteing is provided with spiral helicine resistance wire, two wiring ends of resistance wire are connected with first ignition wire and second ignition wire respectively, and first ignition wire and second ignition wire all set up in the wall body of the combustion-supporting spray needle of igniteing, oxygen distributing pipe and natural gas distributing pipe are connected to the bottom of the combustion-supporting spray needle of igniteing, oxygen distributing pipe with oxygen pipeline connects, natural gas distributing pipe with natural gas pipeline connects, the input electric connection of cable has.
Preferably, the inner walls of the top end and the bottom end of the ignition combustion-supporting spray needle are respectively rotatably sleeved with a first blade outer ring and a second blade outer ring, and the inner walls of the first blade outer ring and the second blade outer ring are respectively and fixedly connected with blades.
Preferably, the sleeve pipe in the middle of the inner end fixedly connected with of blade, the back taper platform form is set to middle sheathed tube bottom, and middle sleeve pipe is cavity structures, the quantity of blade is five, and the even fixed connection of blade is in middle sheathed tube outer wall.
Preferably, the inner cavity at the top end of the ignition combustion-supporting spray needle is positioned at the bottom end of the resistance wire and is arranged into a frustum cavity structure, and the inner diameter of the top end of the frustum is smaller than that of the spiral wire formed by the resistance wire.
Preferably, the ignition combustion-supporting spray needles are arranged at the top end of the ignition combustion-supporting spray head in a spiral line shape, and the ignition combustion-supporting spray needles are perpendicular to the spherical surface at the top end of the ignition combustion-supporting spray head.
Preferably, one end of the oxygen input pipe, which is close to the base, is connected with a first flow control module, an output end of the first flow control module is connected with the oxygen pipeline, one end of the natural gas input pipe, which is close to the base, is connected with a second flow control module, an output end of the second flow control module is connected with the natural gas pipeline, an inner cavity of the ignition combustion-supporting nozzle is provided with a first pressure regulating module and a second pressure regulating module, an input end of the first pressure regulating module is connected with the oxygen pipeline, an output end of the first pressure regulating module is connected with the oxygen distribution pipe, an input end of the second pressure regulating module is connected with the natural gas pipeline, an output end of the second pressure regulating module is connected with the natural gas distribution pipe, and input ends of the first flow control module, the second flow control module, the first pressure regulating module and the second pressure regulating module, and the output end of the control module is electrically connected with the ignition module.
Preferably, the inner cavity of the boiler body is provided with a temperature detection module and an oxygen concentration detection module, and the output ends of the temperature detection module and the oxygen concentration detection module are electrically connected with the input end of the control module.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a boiler ignition combustion-supporting device which is arranged at the axial line position in the inner cavity of a boiler body, a base is fixed below the horizontal plane formed by nozzles of a combustor through a bracket, and the outer wall of the base is fixedly connected with an ignition combustion-supporting spray head which is opposite to a nozzle of the combustor; when the boiler is used, the burner nozzle sprays a mixture of coal powder and combustion-supporting gas, the ignition combustion-supporting nozzle ignites mixed gas of natural gas and oxygen and sprays flame to coal powder airflow sprayed out from the burner nozzle, so that the effect of igniting the coal powder is achieved, when the temperature of the boiler is reduced to endanger the ignition stability of the coal powder and the flame in the boiler pulsates so as to cause flameout danger, the ignition combustion-supporting nozzle can assist combustion in a mode of spraying oxygen to the coal powder airflow, and heat generated in the ignition and combustion-supporting processes is completely used for heating steam, so that the utilization rate of energy is greatly improved.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention as a whole;
FIG. 2 is a schematic cross-sectional view of the present invention as a whole;
FIG. 3 is an enlarged schematic view of FIG. 1 at A according to the present invention;
FIG. 4 is an enlarged view of the structure of FIG. 2 at B according to the present invention;
FIG. 5 is a schematic structural diagram of the top end of the ignition combustion-supporting nozzle of the present invention;
FIG. 6 is a schematic sectional view of the ignition combustion-supporting needle of the present invention;
FIG. 7 is an enlarged view of the structure of FIG. 6 at C according to the present invention;
FIG. 8 is a schematic top view of the outer ring of the first blade of the present invention;
fig. 9 is a schematic block diagram of the control system of the present invention.
In the figure: 1-a boiler body; 11-a temperature detection module; 12-an oxygen concentration detection module; 2-a burner; 3-a base; 4-ignition combustion-supporting spray heads; 41-ignition combustion-supporting spray needles; 411-resistance wire; 412-an oxygen distribution tube; 413-natural gas distribution pipe; 414-first ignition line; 415-a second ignition wire; 416-a first blade outer ring; 4161-leaf; 4162-intermediate pipe sleeve; 417-a second blade outer ring; 42-a first pressure regulation module; 43-a second pressure regulation module; 5-a bracket; 51-oxygen input pipe; 511-a first flow control module; 512-oxygen pipeline; 52-natural gas input pipe; 521-a second flow control module; 522-natural gas pipeline; 53-cable.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In embodiment 1, referring to fig. 1 to 8, the present invention provides a technical solution: a device for boiler ignition and combustion supporting comprises a boiler body 1 and burners 2, wherein the burners 2 are fixedly installed on the wall body of the boiler body 1, the number of the burners 2 is four, the projections of extension lines of the nozzles of the burners 2, which penetrate through the inner wall of the boiler body 1, on the horizontal plane are tangent to the same circle, an ignition combustion supporting device is arranged inside the burners 2, the ignition combustion supporting device is arranged on the central axis of the inner cavity of the boiler body 1 and consists of a base 3, ignition combustion supporting nozzles 4 and a support 5, one end of the support 5 is fixedly connected at four corners of the inner wall of the boiler body 1, the other end of the support 5 is fixedly connected with the base 3, the base 3 is positioned below the horizontal plane formed by the nozzles of the burners 2, the outer wall of the base 3 is fixedly connected with the four ignition combustion supporting nozzles 4, and the nozzles of the ignition combustion supporting nozzles 4 face the nozzle directions of the burners 2, the ignition combustion-supporting nozzle 4 is internally provided with an input pipeline of natural gas and oxygen and an igniter for igniting mixed gas consisting of oxygen and natural gas, when in use, the base 3 provided with the ignition combustion-supporting nozzle 4 is fixedly supported in the inner cavity of the boiler body 1 by the bracket 5, when in ignition, the nozzle of the combustor 2 sprays mixture of pulverized coal and combustion-supporting gas, the ignition combustion-supporting nozzle 4 ignites the mixed gas of natural gas and oxygen by the igniter and sprays flame to pulverized coal airflow sprayed from the nozzle of the combustor 2, the effect of igniting pulverized coal is achieved, and stable fire vortex is formed above the base 3 and is used for heating steam; when the temperature of the inner cavity of the boiler body 1 is reduced to endanger the ignition stability of pulverized coal and the occurrence of the pulsation of flame in the boiler so as to cause flameout danger, the ignition combustion-supporting nozzle 4 can assist combustion in a mode of spraying oxygen to pulverized coal airflow, and heat generated in the ignition and combustion-supporting processes is completely used for heating steam, so that the utilization rate of energy is greatly improved.
The base 3 is in an inverted frustum shape, the middle cavity of the base is also in an inverted frustum shape, particles generated by pulverized coal combustion can fall to the bottom of an inner cavity of the boiler body 1 through the cavity of the base 3, the bottom end of the outer wall of the ignition combustion-supporting spray head 4 at the top end of the base is tangent to the outer wall of the base 3, the ignition combustion-supporting spray head 4 is fixedly connected with the base 3 at the tangent position, the ignition combustion-supporting spray head 4 is provided with an elevation angle, the extension line of the spray opening of the ignition combustion-supporting spray head 4 is intersected with the extension line of the spray opening of the combustor 2 at a position close to the spray opening of the combustor 2, so that the ignition combustion-supporting spray head 4 finishes an ignition process when pulverized coal airflow is just sprayed by the combustor 2, the utilization rate of pulverized coal and combustion-supporting gas is greatly improved, the support 5 is in a cavity structure, an oxygen input pipe 51, a natural gas input pipe 52 and a cable 53 are sleeved in the cavity structure, and a natural gas pipeline 522 connected with the ignition combustion-supporting spray head 4, the outer wall of the bracket 5 is provided with a nano high-temperature-resistant ceramic powder coating, and aluminum silicate is filled around the oxygen input pipe 51, the natural gas input pipe 52 and the cable 53 in the cavity structure, so that the oxygen input pipe 51, the natural gas input pipe 52 and the cable 53 are all in an adiabatic environment, the safety is enhanced, the top end of the ignition combustion-supporting spray head 4 is fixedly connected with a plurality of ignition combustion-supporting spray needles 41, each ignition combustion-supporting spray needle 41 is formed by combining two cylindrical cavities with different outer diameters and inner diameters, the cylindrical cavity with the smaller outer diameter and inner diameter is positioned at the top end part of the ignition combustion-supporting spray needle 41, a spiral resistance wire 411 is arranged in an inner cavity at the top end of the ignition combustion-supporting spray needle 41, two wiring ends of the resistance wire 411 are respectively connected with a first ignition wire 414 and a second ignition wire 415, and the first ignition wire 414 and the second, the bottom end of the ignition combustion-supporting spray needle 41 is connected with an oxygen distribution pipe 412 and a natural gas distribution pipe 413, the oxygen distribution pipe 412 is connected with an oxygen pipeline 512, the natural gas distribution pipe 413 is connected with a natural gas pipeline 522, the input end of the cable 53 is electrically connected with an ignition module, oxygen sequentially passes through an oxygen input pipe 51, the oxygen pipeline 512 and the oxygen distribution pipe 412 and enters the inner cavity of the ignition combustion-supporting spray needle 41, meanwhile, natural gas sequentially passes through a natural gas input pipe 52, the natural gas pipeline 522 and the natural gas distribution pipe 413 and enters the inner cavity of the ignition combustion-supporting spray needle 41, at the moment, through the opening of an igniter, the cable 53, a first ignition wire 414, a second ignition wire 415 and a resistance wire 411 form a closed loop, the resistance wire 411 is preferably made of molybdenum disilicide, the electrified resistance wire 411 rapidly heats up, mixed gas of natural gas and oxygen is ignited, flames are sprayed to pulverized coal airflow sprayed to the combustor, the purpose of ignition is achieved.
The inner walls of the top end and the bottom end of the ignition combustion-supporting spray needle 41 are respectively rotatably sleeved with a first blade outer ring 416 and a second blade outer ring 417, the inner walls of the first blade outer ring 416 and the second blade outer ring 417 are respectively and fixedly connected with blades 4161, oxygen and natural gas enter the inner cavity of the ignition combustion-supporting spray needle 41 and then sequentially pass through the second blade outer ring 417 and the first blade outer ring 416 to push the blades 4161 to rotate, so that the effect of fully mixing the oxygen and the natural gas is achieved, the improvement of the combustion efficiency of the natural gas is facilitated, the inner ends of the blades 4161 are fixedly connected with an intermediate sleeve 4162, the bottom end of the intermediate sleeve 4162 is arranged in, the middle sleeve 4162 is a hollow cavity structure, the number of the blades 4161 is five, the blades 4161 are uniformly and fixedly connected to the outer wall of the middle sleeve 4162, the blades 4161 and the outer ring form a rigid whole, the strength of the whole is improved, and its resistance to gas flow is greatly reduced by the structural arrangement of the intermediate sleeve 4162.
The top end inner cavity of the ignition combustion-supporting spray needle 41 is positioned at the bottom end of the resistance wire 411 and is arranged into a frustum cavity structure, and the inner diameter of the top end of the frustum is smaller than that of the resistance wire 411 to form a spiral line, so that the impact of air flow on the resistance wire 411 is reduced.
The ignition combustion-supporting spray needles 41 are arranged on the top end of the ignition combustion-supporting spray head 4 in a spiral line shape, and the ignition combustion-supporting spray needles 41 are perpendicular to the spherical surface on the top end of the ignition combustion-supporting spray head 4, so that flame sprayed out by the ignition combustion-supporting spray needles 41 forms an approximate vortex structure, and the effect of fully igniting pulverized coal airflow sprayed out by the combustor 2 is achieved.
Embodiment 2, please refer to fig. 1 to 9, the present invention provides a technical solution: a device for boiler ignition and combustion supporting comprises a boiler body 1 and burners 2, wherein the burners 2 are fixedly installed on the wall body of the boiler body 1, the number of the burners 2 is four, the projections of extension lines of the nozzles of the burners 2, which penetrate through the inner wall of the boiler body 1, on the horizontal plane are tangent to the same circle, an ignition combustion supporting device is arranged inside the burners 2, the ignition combustion supporting device is arranged on the central axis of the inner cavity of the boiler body 1 and consists of a base 3, ignition combustion supporting nozzles 4 and a support 5, one end of the support 5 is fixedly connected at four corners of the inner wall of the boiler body 1, the other end of the support 5 is fixedly connected with the base 3, the base 3 is positioned below the horizontal plane formed by the nozzles of the burners 2, the outer wall of the base 3 is fixedly connected with the four ignition combustion supporting nozzles 4, and the nozzles of the ignition combustion supporting nozzles 4 face the nozzle directions of the burners 2, the ignition combustion-supporting spray head 4 is internally provided with an input pipeline of natural gas and oxygen and an igniter for igniting mixed gas formed by oxygen and natural gas, the top end of the ignition combustion-supporting spray head 4 is fixedly connected with a plurality of ignition combustion-supporting spray needles 41, each ignition combustion-supporting spray needle 41 is formed by combining two cylindrical cavities with different outer diameters and inner diameters, the cylindrical cavities with smaller outer diameters and inner diameters are positioned at the top end parts of the ignition combustion-supporting spray needles 41, a spiral resistance wire 411 is arranged in an inner cavity at the top end of each ignition combustion-supporting spray needle 41, two terminal ends of the resistance wire 411 are respectively connected with a first ignition wire 414 and a second ignition wire 415, the first ignition wire 414 and the second ignition wire 415 are both arranged in the wall body of the ignition combustion-supporting spray needles 41, the bottom end of the ignition combustion-supporting spray needles 41 is connected with an oxygen distribution flow pipe 412 and a natural gas distribution flow pipe 413, the oxygen distribution, the input end of the cable 53 is electrically connected with an ignition module, one end of the oxygen input pipe 51 close to the base 3 is connected with a first flow control module 511, the output end of the first flow control module 511 is connected with an oxygen pipeline 512, one end of the natural gas input pipe 52 close to the base 3 is connected with a second flow control module 521, the output end of the second flow control module 521 is connected with a natural gas pipeline 522, the inner cavity of the ignition combustion supporting nozzle 4 is provided with a first pressure regulating module 42 and a second pressure regulating module 43, the input end of the first pressure regulating module 42 is connected with the oxygen pipeline 512, the output end of the first pressure regulating module is connected with an oxygen distributing pipe 412, the input end of the second pressure regulating module 43 is connected with the natural gas pipeline 522, the output end of the second pressure regulating module 43 is connected with a natural gas distributing pipe 413, the input ends of the first flow control module 511, the second flow control module, the output end of the control module is electrically connected with the ignition module, the inner cavity of the boiler body 1 is provided with a temperature detection module 11 and an oxygen concentration detection module 12, the output ends of the temperature detection module 11 and the oxygen concentration detection module 12 are electrically connected with the input end of the control module, during ignition, the control module controls the flow of oxygen through a first flow control module 511 and controls the flow of natural gas through a second flow control module 521 so as to allocate the concentration ratio of mixed gas with the highest combustion efficiency, the control module controls the output pressure of oxygen through a first pressure adjusting module 42 and controls the output pressure of natural gas through a second pressure adjusting module 43, and the control module is simultaneously communicated with an electrifying loop of a resistance wire 411 through the ignition module, so that the mixed gas is ignited and sprayed with enough pressure, the effect of fully igniting pulverized coal airflow is achieved, and when the temperature detection module 11 detects that the temperature of the inner cavity of the, endanger the stability that the buggy catches fire, when the stove flame takes place the pulsation, or the oxygen concentration that oxygen concentration detection module 12 detected is lower, when being not enough to satisfy the abundant high-efficient burning needs of buggy, control module passes through first flow control module 511 and the blowout in the combustion-supporting needle 41 of the oxygen of first pressure regulation module 42 control according to certain pressure and concentration, close the natural gas through second flow control module 521 simultaneously, reach combustion-supporting effect, the boiler body 1 inner chamber temperature that detects according to temperature detection module 11 is crossed lowly, or the oxygen concentration that oxygen detection module 12 detected is crossed lowly, so that when there is flame-out danger, it is combustion-supporting according to the procedure of igniteing, and the in-process only need allocate output concentration and the pressure of oxygen and natural gas can.
The control module may be a circuit including at least one processor, a circuit including at least one single chip, or a combination of multiple circuits or chips, as long as the corresponding functions can be realized.
The working principle is as follows: during ignition, the control module controls the flow of oxygen output from the oxygen input pipe 51 through the first flow control module 511, controls the flow of natural gas output from the natural gas input pipe 52 through the second flow control module 521, controls the output pressure of oxygen output from the oxygen pipeline 512 through the first pressure regulating module 42, controls the output pressure of natural gas output from the natural gas pipeline 522 through the second pressure regulating module 43, the natural gas and oxygen enter the inner cavity of the ignition combustion-supporting spray needle 41 and then sequentially pass through the second blade outer ring 417 and the first blade outer ring 416, the blades 4161 are pushed to rotate so that the oxygen and the natural gas are fully mixed, the control module is simultaneously communicated with an electrifying loop of the resistance wire 411 through the ignition module, so that the mixed gas is ignited and sprayed at sufficient pressure, when pulverized coal airflow is just sprayed by the burner 2, the ignition process is completed, when the temperature detecting module 11 detects that the temperature of the inner cavity of the boiler body 1 is obviously reduced, endanger the stability that the buggy catches fire, when the stove flame takes place the pulsation, or the oxygen concentration that oxygen concentration detection module 12 detected is lower, when being not enough to satisfy the abundant high-efficient burning needs of buggy, control module passes through first flow control module 511 and the blowout from the combustion-supporting needle 41 of ignition of first pressure regulation module 42 control oxygen according to certain pressure and concentration, close the natural gas through second flow control module 521 simultaneously, reach combustion-supporting effect, the boiler body 1 inner chamber temperature that detects according to temperature detection module 11 is crossed lowly, or the oxygen concentration that oxygen detection module 12 detected is crossed lowly, so that when there is flame-out danger, carry out combustion-supporting according to the procedure of igniting.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (1)

1. The utility model provides a device for boiler ignition and combustion-supporting, includes boiler body (1) and combustor (2), fixed mounting has combustor (2) on the wall body of boiler body (1), the quantity of combustor (2) is four, and the spout of combustor (2) runs through respectively the projection and same circular tangent on the horizontal plane of the extension line of boiler body (1) inner wall, combustor (2) inside is provided with the combustion-supporting device of igniteing, its characterized in that: the ignition combustion-supporting device is arranged on a central axis of an inner cavity of a boiler body (1), and consists of a base (3), ignition combustion-supporting nozzles (4) and a support (5), one end of the support (5) is fixedly connected at four corners of the inner wall of the boiler body (1), the other end of the support (5) is fixedly connected with the base (3), the base (3) is positioned below a horizontal plane formed by nozzles of a burner (2), the outer wall of the base (3) is fixedly connected with the four ignition combustion-supporting nozzles (4), the nozzles of the ignition combustion-supporting nozzles (4) respectively face the nozzle direction of the burner (2), natural gas and oxygen input pipelines and igniters used for igniting mixed gas formed by oxygen and natural gas are arranged in the ignition combustion-supporting nozzles (4), and the base (3) is in an inverted frustum shape, the bottom end of the outer wall of the ignition combustion-supporting spray head (4) is tangent to the outer wall of the base (3), the ignition combustion-supporting spray head (4) is fixedly connected with the base (3) at the tangent position, the ignition combustion-supporting spray head (4) is provided with an elevation angle, the extension line of the nozzle of the ignition combustion-supporting spray head (4) is intersected with the extension line of the nozzle of the burner (2) at a position close to the nozzle of the burner (2), the bracket (5) is of a cavity structure, an oxygen input pipe (51), a natural gas input pipe (52) and a cable (53) are sleeved in the cavity structure, an oxygen pipeline (512) connected with the output end of the oxygen input pipe (51) and connected with the ignition combustion-supporting spray head (4) and a natural gas pipeline (522) connected with the output end of the natural gas input pipe (52) and connected with the ignition combustion-supporting spray head (4), the top end of the ignition combustion-supporting spray head (4) is fixedly connected with a plurality of ignition combustion-supporting spray needles (41), each ignition combustion-supporting spray needle (41) is formed by combining two cylindrical cavities with different outer diameters and inner diameters, the cylindrical cavities with the smaller outer diameters and inner diameters are positioned at the top end portions of the ignition combustion-supporting spray needles (41), a spiral resistance wire (411) is arranged in an inner cavity at the top end of each ignition combustion-supporting spray needle (41), two wiring ends of each resistance wire (411) are respectively connected with a first ignition wire (414) and a second ignition wire (415), the first ignition wire (414) and the second ignition wire (415) are both arranged in the wall body of each ignition combustion-supporting spray needle (41), the bottom end of each ignition combustion-supporting spray needle (41) is connected with an oxygen distribution pipe (412) and a natural gas distribution pipe (413), and the oxygen distribution pipe (412) is connected with the oxygen pipeline (512), the natural gas distribution pipe (413) is connected with the natural gas pipeline (522), the input end of the cable (53) is electrically connected with an ignition module, the inner walls of the top end and the bottom end of the ignition combustion-supporting spray needle (41) are respectively sleeved with a first blade outer ring (416) and a second blade outer ring (417) in a rotating mode, the inner walls of the first blade outer ring (416) and the second blade outer ring (417) are respectively and fixedly connected with blades (4161), the inner end of each blade (4161) is fixedly connected with an intermediate sleeve (4162), the bottom end of the intermediate sleeve (4162) is arranged in an inverted frustum shape, the intermediate sleeve (4162) is of a hollow cavity structure, the number of the blades (4161) is five, the blades (4161) are uniformly and fixedly connected to the outer wall of the intermediate sleeve (4162), and the top end inner cavity of the ignition combustion-supporting spray needle (41) is arranged at the bottom end of the resistance wire (411) to form a frustum cavity structure, the inner diameter of the top end of the frustum is smaller than the inner diameter of a spiral line formed by the resistance wire (411), the ignition combustion-supporting spray needle (41) is arranged at the top end of the ignition combustion-supporting spray head (4) in a spiral line shape, the ignition combustion-supporting spray needle (41) is perpendicular to the spherical surface of the top end of the ignition combustion-supporting spray head (4), one end, close to the base (3), of the oxygen input pipe (51) is connected with a first flow control module (511), the output end of the first flow control module (511) is connected with the oxygen pipeline (512), one end, close to the base (3), of the natural gas input pipe (52) is connected with a second flow control module (521), the output end of the second flow control module (521) is connected with the natural gas pipeline (522), a first pressure adjusting module (42) and a second pressure adjusting module (43) are arranged in the inner cavity of the ignition combustion, the input end of the first pressure regulating module (42) is connected with the oxygen pipeline (512), the output end of the second pressure regulating module (43) is connected with the oxygen distribution pipe (412), the input end of the second pressure regulating module is connected with the natural gas pipeline (522), and the output end is connected with the natural gas distribution pipe (413), the input ends of the first flow control module (511), the second flow control module (521), the first pressure regulating module (42) and the second pressure regulating module (43) are electrically connected with a control module, the output end of the control module is electrically connected with the ignition module, the inner cavity of the boiler body (1) is provided with a temperature detection module (11) and an oxygen concentration detection module (12), the output ends of the temperature detection module (11) and the oxygen concentration detection module (12) are electrically connected with the input end of the control module.
CN201910264158.2A 2019-04-03 2019-04-03 Device for ignition and combustion supporting of boiler Active CN110043920B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI85910C (en) * 1989-01-16 1992-06-10 Imatran Voima Oy FOERFARANDE OCH ANORDNING FOER ATT STARTA PANNAN I ETT KRAFTVERK SOM UTNYTTJAR FAST BRAENSLE SAMT FOER ATT SAEKERSTAELLA FOERBRAENNINGEN AV BRAENSLET.
CN2476726Y (en) * 2001-05-16 2002-02-13 项德培 Secondery spiral-flow oil spray gun
DE102013111504B4 (en) * 2013-10-18 2017-12-07 Mitsubishi Hitachi Power Systems Europe Gmbh Method for igniting a power plant burner and suitable pulverized coal burner
CN104676586A (en) * 2014-11-10 2015-06-03 中国神华能源股份有限公司 Micro-gas ignition and combustion-supporting combustor and micro-gas ignition system
CN204987005U (en) * 2015-07-14 2016-01-20 北京市公用事业科学研究所 Air distributor and low NOx gas combustion ware of gas combustion utensils
CN206191584U (en) * 2016-10-11 2017-05-24 北京科利得燃烧设备有限责任公司 Dimethyl ether combustor

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Denomination of invention: A device for boiler ignition and combustion support

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