CN112413618B - Soot blowing device - Google Patents
Soot blowing device Download PDFInfo
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- CN112413618B CN112413618B CN202011336285.8A CN202011336285A CN112413618B CN 112413618 B CN112413618 B CN 112413618B CN 202011336285 A CN202011336285 A CN 202011336285A CN 112413618 B CN112413618 B CN 112413618B
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- mixed gas
- shock wave
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- pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
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- 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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a soot blowing device, comprising: and the spray ends of the shock wave generators face the outer wall surface of the air pipe of the air preheater. The plurality of shock wave generators are connected with a group of mixed gas supply devices and a group of power supply ignition devices, the mixed gas supply devices are used for supplying mixed gas to the shock wave generators, the power supply ignition devices are used for igniting the mixed gas in the shock wave generators according to set pulse frequency to generate thermal explosion shock waves, and the shock wave generators are used for spraying the thermal explosion shock waves to the outer wall surface of the air pipe through the spraying ends of the thermal explosion shock waves so as to break up and disperse the hardening matters and the powdery matters in the air preheater. The soot blower of the invention can break up and disperse the plate matters adhered on the outer wall surface of the air pipe and the powder matters dispersed in the gap of the air pipe by the impact force of a plurality of and multi-angle thermal explosion impact waves, thereby effectively relieving the problem of blockage of the air preheater and reducing the smoke flow resistance.
Description
Technical Field
The invention relates to the technical field of biological generator sets, in particular to a soot blowing device.
Background
After the biomass fuel is combusted, the flue gas generally contains sulfur dioxide, sulfur trioxide, carbon monoxide, sodium ions and the like, and in the flue gas emission process, an air preheater is arranged in a flue to cool the flue gas and recover energy.
When the flue gas flows through the air preheater, because the temperature is reduced, sulfur dioxide, sulfur trioxide and the like are easy to form sodium sulfate with sodium ions and water vapor, the sodium sulfate is mixed with ash in the flue gas to form acid condensation plate structures, carbon monoxide and the like are easy to form sodium hydroxide with the water vapor, the sodium hydroxide is mixed with the ash in the flue gas to form water condensation plate structures, and the plate structures are hardened on the channel wall surface of the air preheater, so that the air preheater is blocked, the flue gas circulation resistance is increased, the load and current of an induced air fan at a flue gas discharge outlet are increased, the operation stability of a boiler is poor, the ash removal times of the boiler are increased, the boiler is required to be stopped for ash removal for 48 hours about 20 days, and the total power generation amount of a biological generator set is reduced.
Disclosure of Invention
The invention provides soot blowing equipment, which aims to solve the technical problem that the number of times of blowing out is increased due to serious soot deposition and blockage of the existing air preheater.
The technical scheme adopted by the invention is as follows:
a sootblowing apparatus comprising: the air preheater comprises a plurality of shock wave generators arranged on the periphery of the air preheater, wherein the injection end of each shock wave generator faces the outer wall surface of an air pipe of the air preheater; the plurality of shock wave generators are connected with a group of mixed gas supply devices and a group of power supply ignition devices, the mixed gas supply devices are used for supplying mixed gas to the shock wave generators, the power supply ignition devices are used for igniting the mixed gas in the shock wave generators according to set pulse frequency to generate thermal explosion shock waves, and the shock wave generators are used for spraying the thermal explosion shock waves to the outer wall surface of the air pipe through the spraying ends of the thermal explosion shock waves so as to break up and disperse the hardening matters and the powdery matters in the air preheater.
Further, the shock wave generator comprises a generator body and a spray head communicated with the generator body; the generator body is connected to the wall surface of the flue provided with the air preheater, and the mixed gas supply device and the power supply ignition device are respectively communicated with the generator body; the connection angle of the spray head and the generator body is adjustable so as to spray towards the outer wall surface of the air pipe, and the distance between the spray head and the outer wall surface of the air pipe is 300-500 mm.
Further, the shock wave generator is arranged above the air preheater, and the nozzle and the vertical plane form an included angle to extend downwards towards the outer wall surface of the air pipe; and/or the shock wave generators are arranged at the left side and the right side of the air preheater, and the included angle between the nozzle and the horizontal surface extends downwards towards the outer wall surface of the air pipe; and/or the shock wave generator is arranged below the air preheater, and the nozzle and the vertical plane form an included angle to extend upwards towards the outer wall surface of the air pipe.
Further, the number of the air preheaters is multiple, and the air preheaters are sequentially arranged at intervals along the height direction of the flue; the shock wave generators are arranged between the adjacent air preheaters and on the left side and the right side of each air preheater.
Further, the mixed gas supply device comprises a gas supply source for supplying gas, a gas delivery pipe for delivering gas, an oxygen supply source for supplying oxygen, an oxygen delivery pipe for delivering oxygen, a first compressed gas supply source for supplying compressed air for a process, a first compressed gas delivery pipe for delivering compressed air for a process, a mixed gas mixing module for mixing gas, oxygen and compressed air for a process into mixed gas, and a mixed gas delivery pipe for delivering mixed gas; two ends of the gas conveying pipe are respectively connected with a gas supply source and a mixed gas mixing module; two ends of the oxygen conveying pipe are respectively connected with an oxygen supply source and the mixed gas mixing module; two ends of the first compressed gas conveying pipe are respectively connected with a first compressed gas supply source and the mixed gas mixing module; two ends of the mixed gas conveying pipe are respectively connected with the mixed gas mixing module and each shock wave generator.
Further, the power supply ignition device comprises a power supply source, a first cable, a second cable and pulse igniters arranged in the shock wave generators; two ends of the first cable are respectively connected with a power supply and a mixed gas mixing module; two ends of the second cable are respectively connected with a power supply and a pulse igniter.
Further, the mixed gas supply device also comprises a second compressed gas supply source for supplying compressed air for the connector, a second compressed gas conveying pipe for conveying the compressed air for the connector, and a pneumatic distribution and distribution module for adjusting the ratio of the fuel gas to the oxygen and the compressed air in the mixed fuel gas; the power supply ignition device also comprises a third cable; the pneumatic distribution module is connected to the pipeline of the mixed gas conveying pipe; the input end of the second compressed gas conveying pipe is connected with a second compressed gas supply source, and the output end of the second compressed gas conveying pipe is connected with the pneumatic distribution module; the input end of the third cable is connected with a power supply, and the output end of the third cable is connected with a pneumatic distribution module.
Further, the mixed gas conveying pipes comprise a mixed gas main conveying pipe and a plurality of mixed gas branch conveying pipes corresponding to one air preheater, and each mixed gas branch conveying pipe corresponds to one pneumatic distribution and distribution module; the input end of the mixed gas main conveying pipe is connected with the mixed gas mixing module, and the output end of the mixed gas main conveying pipe is connected with the pneumatic distribution module which is correspondingly arranged; the input end of the mixed gas branch conveying pipe is connected with the corresponding pneumatic distribution module, and the output end of the mixed gas branch conveying pipe is connected with part of the shock wave generator of the air preheater; the output ends of the second compressed gas conveying pipe and the third cable are respectively connected with the corresponding mixed gas mixing modules.
Further, the soot blower also comprises a cold air supply device, and the output end of the cold air supply device is connected with each shock wave generator; the cold air supply device is used for supplying cold air to the shock wave generator so as to reduce the temperature of the thermal explosion shock wave, push the thermal explosion shock wave outwards and prevent the thermal explosion shock wave from reversely striking back the shock wave generator.
Further, the cold air supply device comprises a cold air supply source for supplying cold air and a cold air conveying pipe for conveying the cold air; the two ends of the cold air conveying pipe are respectively connected with a cold air source and the spray heads of the shock wave generators.
The invention has the following beneficial effects:
when the soot blower works, the mixed gas supply device supplies mixed gas to the shock wave generator, the power supply ignition device is started to generate pulse electric sparks, the mixed gas in the shock wave generator is ignited under the action of the pulse electric sparks to generate thermal explosion shock waves, and the thermal explosion shock waves are sprayed to the outer wall surface of an air pipe arranged in the air preheater through the spraying end of the shock wave generator. The number of the shock wave generators is multiple, and the multiple shock wave generators are arranged on the periphery of the air preheater, so that the impact force of the thermal explosion shock waves with multiple numbers and multiple angles can break up and disperse the plate matters adhered to the outer wall surface of the air pipe and the powder matters dispersed in the gaps of the air pipe, the problem of blockage of the air preheater can be effectively relieved, the smoke flow resistance is reduced, the load and current of an induced air fan at a smoke discharge outlet are further reduced, the operation of a boiler is stable, the number of times of blowing-in and blowing-out is reduced, the blowing-in and blowing-out are prolonged from the original operation of 20 days to the operation of 60 days and blowing-out are carried out for 48 hours, the total power generation amount of the generator set is increased by 15000 x 24 kW, and a 15000 x 24 x 4 x 0.75 yuan of production value is created.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of a soot blowing device of a preferred embodiment of the present invention.
Description of the drawings
64. An air preheater; 81. a shock wave generator; 82. a mixed gas supply device; 821. a gas supply source; 822. a gas delivery pipe; 823. an oxygen supply source; 824. an oxygen delivery tube; 825. a first compressed gas supply source; 826. a first compressed gas delivery pipe; 827. a gas mixture mixing module; 828. a mixed gas conveying pipe; 829. a second compressed gas supply source; 830. a second compressed gas delivery pipe; 831. a pneumatic distribution module; 84. a power supply ignition device; 841. a power supply; 842. a first cable wire; 843. a third cable; 85. a cold air supply device; 851. a cold air supply source; 852. a cold air conveying pipe.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawing figures, but the invention can be practiced in a number of different ways, as defined and covered below.
Referring to FIG. 1, a preferred embodiment of the present invention provides a sootblower comprising: a plurality of shock wave generators 81 disposed on the outer periphery of the air preheater 64, and the jet end of each shock wave generator 81 faces the outer wall surface of the air tube of the air preheater 64. The plurality of shock wave generators 81 are commonly connected with a group of mixed gas supply devices 82 and a group of power supply ignition devices 84, the mixed gas supply devices 82 are used for supplying mixed gas to the shock wave generators 81, the power supply ignition devices 84 are used for igniting the mixed gas in the shock wave generators 81 according to a set pulse frequency to generate thermal explosion shock waves, and the shock wave generators 81 are used for spraying the thermal explosion shock waves from the spraying ends to the outer wall surfaces of the air pipes so as to break up and disperse the hardening matters and the powdery matters in the air preheater 64.
When the soot blower of the present invention is in operation, the mixed gas supply device 82 supplies the mixed gas to the shock wave generator 81, the power supply ignition device 84 is started to generate pulse electric spark, the mixed gas in the shock wave generator 81 is ignited under the action of the pulse electric spark to generate thermal explosion shock waves, and the thermal explosion shock waves are sprayed onto the outer wall surface of the air pipe arranged in the air preheater 64 from the spraying end of the shock wave generator 81. Since the number of the shock wave generators 81 is plural, and the plurality of shock wave generators 81 are separately arranged on the periphery of the air preheater 64, the impact force of the thermal explosion shock waves with plural numbers and multiple angles can crush and disperse the plate matters adhered to the outer wall surface of the air pipe and the powder matters dispersed in the gaps of the air pipe, so that the problem of the blockage of the air preheater 64 can be effectively relieved, the smoke circulation resistance is reduced, the load and the current of the induced air fan at the smoke emission outlet are reduced, the boiler operation is stable, the number of times of blowing out and cleaning is reduced, the blowing out and cleaning are prolonged from the original 20 days to the 60 days, the blowing out and cleaning are carried out for 48 hours, the total power generation amount of the generator set is increased by 15000 x 24 kW, and the 15000 x 24 x 4 x 0.75 yuan of output value is created.
Alternatively, as shown in FIG. 1, the shock wave generator 81 includes a generator body, and a spray head in communication with the generator body. The generator body is connected to the wall surface of the flue in which the air preheater 64 is installed, and the mixture supply device 82 and the power supply ignition device 84 are respectively communicated with the generator body. The connection angle of the spray head and the generator body is adjustable so as to spray towards the outer wall surface of the air pipe, and the distance between the spray head and the outer wall surface of the air pipe is 300-500 mm. In the alternative scheme, the connection angle between the spray head and the generator body is adjustable, so no matter how the inner wall surfaces of the generator body and the flue are arranged and installed, the spray head connected with the generator body faces the outer wall surface of the air pipe of the corresponding air preheater 64, so that the installation of the shock wave generator 81 is flexible, and the impact and dispersion effect of the thermal explosion shock wave on the hardening matters and the dispersion blocks can be adjusted by adjusting the angle of the spray head sprayed to the outer wall surface of the air pipe; and the distance between the spray head and the outer wall surface of the air pipe is 300-500 mm, so that the fluctuation and the radiation range of the thermal explosion shock wave can be widest while the impact force of the thermal explosion shock wave on the outer wall surface of the air pipe is ensured, and the optimal impact force and impact effect are further obtained.
In the alternative, the shock wave generator 81 is arranged above the air preheater 64, and the nozzle and the vertical plane form an included angle to extend downwards towards the outer wall surface of the air pipe; preferably, the nozzle and the vertical plane form an included angle of 20-60 degrees, the spraying impact force is best, the blast wave explosion radiation range is the widest, and the crushing and scattering effects of the plate and the dispersing block are the best. And/or the shock wave generators 81 are arranged on the left side and the right side of the air preheater 64, and the nozzle and the horizontal surface form an included angle to extend downwards towards the outer wall surface of the air pipe; preferably, the included angle between the nozzle and the horizontal surface is 20-60 degrees, the spraying impact force is best, the blast wave explosion radiation range is the widest, and the crushing and scattering effects of the plate and the dispersing block are the best. And/or the shock wave generator 81 is arranged below the air preheater 64, and the nozzle extends upwards towards the outer wall surface of the air pipe at an included angle with the vertical plane; preferably, the nozzle and the vertical plane form an included angle of 20-60 degrees, the spraying impact force is best, the blast wave explosion radiation range is the widest, and the crushing and scattering effects of the plate and the dispersing block are the best. By means of arrangement and structural arrangement of the shock wave generator 81, impact and dispersion effects of thermal explosion shock waves on the hardening matters and the dispersion blocks can be adjusted, so that the fluctuation and radiation range of the thermal explosion shock waves are widest while the impact force of the thermal explosion shock waves on the outer wall surface of the air pipe is ensured, and further the optimal impact force and impact effect are obtained.
In this alternative embodiment, the number of air preheaters 64 is plural, and the plurality of air preheaters 64 are sequentially arranged at intervals along the height direction of the flue. The shock wave generator 81 is disposed between adjacent air preheaters 64 and on both left and right sides of each air preheater 64.
Alternatively, as shown in fig. 1, the gas mixture supply device 82 includes a gas supply source 821 for supplying gas, a gas delivery pipe 822 for delivering gas, an oxygen supply source 823 for supplying oxygen, an oxygen delivery pipe 824 for delivering oxygen, a first compressed gas supply source 825 for supplying compressed air for a process, a first compressed gas delivery pipe 826 for delivering compressed air for a process, a gas mixture module 827 for mixing gas, oxygen and compressed air for a process into a gas mixture, and a gas mixture delivery pipe 828 for delivering the gas mixture. Both ends of the gas delivery pipe 822 are connected to the gas supply source 821 and the mixture mixing module 827, respectively. Both ends of the oxygen delivery pipe 824 are connected to an oxygen supply source 823 and a mixture mixing module 827, respectively. Both ends of the first compressed gas delivery pipe 826 are connected to a first compressed gas supply source 825 and a mixture mixing module 827, respectively. Both ends of the mixture pipe 828 are connected to the mixture mixing module 827 and each shock wave generator 81, respectively. When the gas mixture supply device of the invention works, the gas supply source 821 is started, the gas is conveyed to the gas mixture mixing module 827 through the gas conveying pipe 822, the oxygen supply source 823 is started, the oxygen is conveyed to the gas mixture mixing module 827 through the oxygen conveying pipe 824, the first compressed gas supply source 825 is started, and the process compressed air is conveyed to the gas mixture mixing module 827 through the first compressed gas conveying pipe 826; the mixed gas mixing module 827 mixes the gas, oxygen and process compressed air into a mixed gas, and then inputs the mixed gas into the mixed gas delivery pipe 828, and the mixed gas delivery pipe 828 delivers the mixed gas to each shock wave generator 81.
Optionally, as shown in fig. 1, the power supply ignition device 84 includes a power supply 841, a first cable 842, a second cable, and a pulse igniter disposed within each shock wave generator 81. Both ends of the first cable 842 are respectively connected to the power supply 841 and the gas mixture mixing module 827. Both ends of the second cable wire are respectively connected with the power supply 841 and the pulse igniter. When the power supply ignition device 84 of the present invention works, the power supply 841 transmits current to the gas mixture mixing module 827 through the first cable 842 to support various actions of the gas mixture mixing module 827; likewise, the power supply 841 supplies current to the pulse igniter through the second cable to pulse the pulse igniter.
Further, as shown in fig. 1, the mixed gas supply device 82 further includes a second compressed gas supply source 829 for supplying compressed air for the meter, a second compressed gas delivery pipe 830 for delivering the compressed air for the meter, and a pneumatic distribution module 831 for adjusting the ratio of the fuel gas to the oxygen gas and the compressed air in the mixed fuel gas. The powered ignition device 84 also includes a third electrical cord 843. A pneumatic distribution module 831 is connected in the line of the mixture pipe 828. The input end of the second compressed gas conveying pipe 830 is connected with a second compressed gas supply source 829, and the output end of the second compressed gas conveying pipe 830 is connected with a pneumatic distribution module 831. An input end of the third cable 843 is connected with the power supply 841, and an output end of the third cable 843 is connected with the pneumatic distribution module 831. During operation, the second compressed air supply source 829 is started, compressed air for instrument connection is conveyed to the pneumatic distribution module 831 through the second compressed air conveying pipe 830, and meanwhile, the power supply 841 conveys current to the pneumatic distribution module 831 through the third cable 843 so as to support various actions of the pneumatic distribution module 831; the pneumatic distribution module 831 adjusts the ratio of the fuel gas to the oxygen and the compressed air in the mixed fuel gas according to the setting to form a rich mixed fuel gas of the fuel gas and the oxygen and a normal mixed fuel gas of the fuel gas and the compressed air, and the mixed fuel gas delivery pipe 828 delivers the rich mixed fuel gas or the normal mixed fuel gas to the corresponding shock wave generator 81.
In this alternative embodiment, as shown in fig. 1, the mixture delivery pipe 828 includes a mixture main delivery pipe and a plurality of mixture branch delivery pipes corresponding to one air preheater 64, and each of the mixture branch delivery pipes corresponds to one of the pneumatic distribution modules 831. The input end of the mixed gas main conveying pipe is connected with the mixed gas mixing module 827, and the output end of the mixed gas main conveying pipe is connected with the pneumatic distribution module 831 which is correspondingly arranged. The input end of the mixed gas branch conveying pipe is connected with a corresponding pneumatic distribution module 831, and the output end of the mixed gas branch conveying pipe is connected with a part of shock wave generator 81 of the air preheater 64. The output ends of the second compressed gas delivery pipe 830 and the third cable 843 are respectively connected to the corresponding mixed gas mixing modules 827. In this embodiment, on the one hand, each air preheater 64 is provided with a plurality of gas mixture branch conveying pipes, and two ends of each gas mixture branch conveying pipe are respectively connected with a pneumatic distribution module 831 and a plurality of shock wave generators 81, so that the ratio of mixed fuel gas in each gas mixture branch conveying pipe is different by adjusting the pneumatic distribution module 831, and therefore, the impact force of the thermal explosion shock wave generated by combustion is different, the radiation range is different, and further, the working requirements of different air preheaters 64 are met and adapted more flexibly, and the flexibility is better, and the energy is also more saved and reliable; on the other hand, the arrangement of the air preheater 64 has better adaptability and higher flexibility of the soot blower, and simultaneously, the overall structure is simple, and the layout is compact and reasonable.
Optionally, as shown in fig. 1, the soot blower further comprises a cold air supply device 85, and an output end of the cold air supply device 85 is connected to each shock wave generator 81. The cold air supply device 85 is used for supplying cold air to the shock wave generator 81 to reduce the temperature of the thermal explosion shock wave, push the thermal explosion shock wave outwards, and prevent the thermal explosion shock wave from reversely striking back the shock wave generator 81. Through setting up cold wind feeding device 85 to supply cold wind to each shock wave generator 81, and then reduce the temperature of thermal explosion shock wave, reduce the damage to the air pipe, and simultaneously available cold wind outwards pushes away thermal explosion shock wave, so that the radiation scope of thermal explosion shock wave is wider, the impact strength is stronger, and can also effectively prevent thermal explosion shock wave reverse back impact shock wave generator 81, improve shock wave generator 81's life.
In this alternative, as shown in fig. 1, the cool air supply device 85 includes a cool air supply source 851 for supplying cool air, and a cool air supply pipe 852 for supplying cool air. Both ends of the cold air supply pipe 852 are connected to a cold air source and a nozzle of each shock wave generator 81, respectively.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A sootblower, comprising:
a plurality of shock wave generators (81) arranged on the periphery of the air preheater (64), wherein the injection end of each shock wave generator (81) faces the outer wall surface of the air pipe of the air preheater (64);
the plurality of shock wave generators (81) are commonly connected with a group of mixed gas supply devices (82) and a group of power supply ignition devices (84), the mixed gas supply devices (82) are used for supplying mixed gas to the shock wave generators (81), the power supply ignition devices (84) are used for igniting the mixed gas in the shock wave generators (81) according to a set pulse frequency to generate thermal explosion shock waves, and the shock wave generators (81) are used for spraying the thermal explosion shock waves to the outer wall surface of the air pipe from the spraying ends of the thermal explosion shock waves so as to break up and disperse the plate and powder in the air preheater (64);
the shock wave generator (81) comprises a generator body and a spray head communicated with the generator body;
the mixed gas supply device (82) comprises a gas supply source (821) for supplying gas, a gas delivery pipe (822) for delivering gas, an oxygen supply source (823) for supplying oxygen, an oxygen delivery pipe (824) for delivering oxygen, a first compressed gas supply source (825) for supplying compressed air for a process, a first compressed gas delivery pipe (826) for delivering compressed air for a process, a mixed gas mixing module (827) for mixing gas, oxygen and compressed air for a process into mixed gas, and a mixed gas delivery pipe (828) for delivering mixed gas;
the mixed gas supply device (82) further comprises a second compressed gas supply source (829) for supplying compressed air for the joint instrument, a second compressed gas conveying pipe (830) for conveying the compressed air for the joint instrument, and a pneumatic distribution module (831) for adjusting the ratio of the fuel gas to the oxygen and the compressed air in the mixed fuel gas;
the mixed gas conveying pipe (828) comprises a mixed gas main conveying pipe and a plurality of mixed gas branch conveying pipes corresponding to one air preheater (64), and each mixed gas branch conveying pipe corresponds to one pneumatic distribution module (831); the input end of the mixed gas main conveying pipe is connected with a mixed gas mixing module (827), and the output end of the mixed gas main conveying pipe is connected with a pneumatic distribution module (831) which is correspondingly arranged; the input end of the mixed gas branch conveying pipe is connected with a corresponding pneumatic distribution module (831), and the output end of the mixed gas branch conveying pipe is connected with a part of shock wave generator (81) of the air preheater (64); the output ends of the second compressed gas conveying pipe (830) and the third cable (843) are respectively connected with corresponding mixed gas mixing modules (827);
the soot blower also comprises a cold air supply device (85), and the output end of the cold air supply device (85) is connected with each shock wave generator (81); the cold air supply device (85) is used for supplying cold air to the shock wave generator (81) so as to reduce the temperature of the thermal explosion shock wave, push the thermal explosion shock wave outwards and prevent the thermal explosion shock wave from reversely striking back the shock wave generator (81); the cold air supply device (85) comprises a cold air supply source (851) for supplying cold air and a cold air conveying pipe (852) for conveying the cold air; both ends of the cold air conveying pipe (852) are respectively connected with a cold air source and spray heads of the shock wave generators (81).
2. The sootblower of claim 1 wherein said soot blower comprises a plurality of soot blowers,
the generator body is connected to the wall surface of a flue provided with the air preheater (64), and the mixed gas supply device (82) and the power supply ignition device (84) are respectively communicated with the generator body;
the connection angle of the spray head and the generator body is adjustable so as to spray towards the outer wall surface of the air pipe, and the distance between the spray head and the outer wall surface of the air pipe is 300-500 mm.
3. The sootblower of claim 2 wherein said soot blower comprises a plurality of soot blowers,
the shock wave generator (81) is arranged above the air preheater (64), and the spray head and the vertical plane form an included angle to extend downwards towards the outer wall surface of the air pipe; and/or
The shock wave generators (81) are arranged on the left side and the right side of the air preheater (64), and the spray heads and the horizontal surface form an included angle to extend downwards towards the outer wall surface of the air pipe; and/or
The shock wave generator (81) is arranged below the air preheater (64), and the spray head and the vertical plane form an included angle to extend upwards towards the outer wall surface of the air pipe.
4. A sootblower as recited in claim 3 wherein,
the number of the air preheaters (64) is multiple, and the air preheaters (64) are sequentially arranged at intervals along the height direction of the flue;
the shock wave generators (81) are arranged between adjacent air preheaters (64) and on the left and right sides of each air preheater (64).
5. The sootblower of claim 2 wherein said soot blower comprises a plurality of soot blowers,
both ends of the gas conveying pipe (822) are respectively connected with the gas supply source (821) and the mixed gas mixing module (827);
both ends of the oxygen delivery pipe (824) are respectively connected with the oxygen supply source (823) and the mixed gas mixing module (827);
two ends of the first compressed gas conveying pipe (826) are respectively connected with the first compressed gas supply source (825) and the mixed gas mixing module (827);
both ends of the mixed gas conveying pipe (828) are respectively connected with the mixed gas mixing module (827) and each shock wave generator (81).
6. The sootblower of claim 5 wherein said soot blower comprises a blower,
the power supply ignition device (84) comprises a power supply source (841), a first cable (842), a second cable and pulse igniters arranged in the shock wave generators (81);
both ends of the first cable (842) are respectively connected with the power supply (841) and the mixed gas mixing module (827);
and two ends of the second cable wire are respectively connected with the power supply (841) and the pulse igniter.
7. The sootblower of claim 6 wherein said soot blower comprises a blower,
the powered ignition device (84) further comprises a third cable wire (843);
the pneumatic distribution module (831) is connected to the pipeline of the mixed gas conveying pipe (828);
the input end of the second compressed gas conveying pipe (830) is connected with the second compressed gas supply source (829), and the output end of the second compressed gas conveying pipe (830) is connected with the pneumatic distribution module (831);
the input end of the third cable (843) is connected with the power supply (841), and the output end of the third cable (843) is connected with the pneumatic distribution module (831).
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| CN202011336285.8A CN112413618B (en) | 2020-11-25 | 2020-11-25 | Soot blowing device |
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| CN112413618B true CN112413618B (en) | 2023-08-08 |
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| CN112413618A (en) | 2021-02-26 |
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