CN210314136U - Gasifier burner structure with spiral flow channel - Google Patents
Gasifier burner structure with spiral flow channel Download PDFInfo
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- CN210314136U CN210314136U CN201921100477.1U CN201921100477U CN210314136U CN 210314136 U CN210314136 U CN 210314136U CN 201921100477 U CN201921100477 U CN 201921100477U CN 210314136 U CN210314136 U CN 210314136U
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Abstract
The utility model relates to a gasifier burner structure of a spiral flow passage, which comprises a burner shell, a liquid inlet pipe, a vent pipe, a first air inlet pipe, a second air inlet pipe, a compressed air pipe, a water inlet pipe and a water outlet pipe; the first spiral plate and the second spiral plate of the utility model not only improve the rigidity of the burner, but also ensure the coaxiality of the burner, so that the processing error, the assembly error and the thermal deformation of the flow channel are all limited; meanwhile, vibration is effectively dispersed, and the probability of mechanical failure is reduced; the first spiral plate and the second spiral plate accelerate the flow velocity of oxygen and fluid respectively and change the direction of the oxygen and the fluid into the spiral direction, the mixing time in the mixing cavity is longer, the mixing is more sufficient, the atomization effect of the coal water slurry is better, and the combustion is quicker after the water coal slurry is sprayed out of the burner.
Description
Technical Field
The utility model relates to a gasifier nozzle structure of spiral runner.
Background
In the water-coal-slurry gasification process, a burner of a gasification furnace is used for atomizing water-coal-slurry serving as fuel and then spraying the atomized water-coal-slurry into the gasification furnace for combustion; the coal water slurry is a low-pollution, high-efficiency and pipelineable oil-substituting coal-based fluid fuel which is obtained by physically processing about 65% of coal, 34% of water and 1% of additives.
The existing burner is characterized in that three layers of pipelines with gradually increased pipe diameters are sleeved together, high-pressure oxygen is introduced into an inner pipe and an outer pipe during combustion, and coal water slurry is introduced into a middle pipe. Mixing the coal water slurry with the high-pressure gas at the tail end close to the outlet of the burner, spraying the mixture out from the outlet of the burner, rapidly expanding the volume of the gas at the moment of spraying, dispersing and atomizing the coal water slurry into fine particles, and fully burning the fine particles in a hearth; the above structure has several disadvantages:
1. the rigidity of the burner is insufficient, because three layers of mutually nested runners are only welded through a few supporting plates, fluid can vibrate when passing through the runners, high-pressure oxygen and water-coal slurry can vibrate at different frequencies when flowing at high speed in the three layers of runners, and the vibration can generate continuous impact on the supporting plates between the runners, so that cracks appear on welding seams between the supporting plates and the runners;
2. the coal water slurry and the oxygen are not fully mixed, the flowing directions of the coal water slurry and the high-pressure oxygen are the same, especially when the coal water slurry works under the condition of low load, the spraying speeds of the coal water slurry and the oxygen are insufficient, the coal water slurry and the oxygen are difficult to be fully mixed and atomized, the coal water slurry cannot be fully combusted, and the combustion efficiency is reduced;
3. the burner is complex in structure, and carbon deposition is easily formed in the coal water slurry in a narrow gap by the aid of the nested structure of the three layers of runners. The carbon deposits can form adhesion between the flow channels, so that the fuel and the high-pressure oxygen are prevented from passing through, and the disassembly and cleaning work of the burner during maintenance is also prevented.
4. The cooling water pipe is externally arranged and spirally coiled on the burner, so that carbon deposition is easily generated, and the difficulty in disassembly and assembly is caused.
In conclusion, the existing gasifier nozzle structure has short service life and frequent maintenance, and the nozzle needs to be stopped and cooled for maintenance or replacement, so that the whole production process flow is greatly influenced, the economic loss is large, and the gasifier nozzle structure is to be further improved.
SUMMERY OF THE UTILITY MODEL
In view of the current situation of the prior art, the technical problem to be solved by the present invention is to provide a burner that not only improves the rigidity of the burner, but also ensures the coaxiality of the burner, and simultaneously effectively disperses the vibration, thereby reducing the probability of mechanical failure; the mixing time of the oxygen and the fluid is longer, the mixing is more sufficient, the service life is effectively prolonged, the maintenance frequency is greatly reduced, the production safety and reliability are improved, and the size of the burner structure of the gasification furnace with the spiral flow channel is small and compact.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a gasifier burner structure with a spiral flow channel comprises a burner shell, a liquid inlet pipe, a vent pipe, a first air inlet pipe, a second air inlet pipe, a compressed air pipe, a water inlet pipe and a water outlet pipe, and is characterized in that a cone opening part is formed at the upper end of the burner shell, a backing ring is outwards formed at the outer side of the upper end of the burner shell, the backing ring is arranged below the cone opening part, the lower end of the burner shell is sealed and vertically distributed liquid inlet pipes are fixedly inserted in the lower end of the burner shell, and the upper end of the liquid inlet pipe is arranged below the cone opening part; the outer side of the liquid inlet pipe is outwards provided with at least one first spiral plate, the outer sides of the first spiral plates are fixed on the inner wall of the burner shell, and one end of the first air inlet pipe is inserted and fixed at the bottom of one side of the burner shell and communicated with the inside of the burner shell; the vent pipe is vertically arranged inside the liquid inlet pipe, the lower end of the vent pipe is closed, at least one second spiral plate is outwards formed on the outer side of the vent pipe, and the outer sides of the second spiral plates are fixed on the inner wall of the liquid inlet pipe; one end of the second air inlet pipe penetrates through one side of the liquid inlet pipe, is inserted into one side of the lower end of the vent pipe and is fixedly connected with the interior of the vent pipe, and the second air inlet pipe is arranged below the burner shell; a spiral water channel is formed inside the burner shell, and one ends of the water inlet pipe and the water outlet pipe are inserted and fixed at the lower end of the burner shell and are respectively communicated with the two ends of the spiral water channel; the burner is characterized in that a spacer layer is formed inside the burner shell and the conical opening part, and one end of the compressed air pipe is inserted into one side of the burner shell and is communicated with the inner wall of the lower end of the spacer layer.
Preferably, one end of the spiral water channel is arranged at the lower end of the burner shell, and the other end of the spiral water channel is upwards wound to the upper end of the conical opening part and then downwards wound to the lower end of the burner shell.
Preferably, the spacer layer is sleeved outside the spiral water channel.
Preferably, a plurality of small holes distributed circumferentially are formed in the outer side of the conical opening and the outer side of the upper end of the burner shell, and the inner end of each small hole is communicated with the inside of the spacer layer.
Compared with the prior art, the utility model has the advantages of: the first spiral plate and the second spiral plate of the utility model not only improve the rigidity of the burner, but also tightly connect the three-layer flow passages into a whole to support each other; the coaxiality of the burner is ensured, so that the processing error, the assembly error and the thermal deformation of the flow channel are limited, the spatial distribution of each part in the flow channel is more uniform, and the flow channel is smoother; meanwhile, the first spiral plate and the second spiral plate also effectively disperse vibration, and the probability of mechanical failure is reduced; the first spiral plate and the second spiral plate respectively accelerate the flow velocity of oxygen and fluid and change the direction of the oxygen and the fluid into a spiral direction, the mixing time in the mixing cavity is longer, the mixing is more sufficient, the atomization effect of the coal water slurry is better, and the combustion is quicker after the coal water slurry is sprayed out of the burner; in addition, the spirally sprayed coal water slurry has a certain protection effect on the burner, and because the spirally sprayed coal water slurry and the high-pressure oxygen can form a black area with lower temperature in a certain range at the outlet, the radial cracking of the burner caused by the erosion of the burner by the high temperature in the furnace is avoided; the utility model also integrates the cooling water channel into the burner to replace an external cooling spiral water pipe, thereby not only protecting the fragile cooling water channel, but also reducing the risk of cracking of the weak part of the welding line, and omitting frequent maintenance and disassembly of the external cooling spiral water pipe; meanwhile, the heat exchange efficiency is improved, the contact area between cooling water and the burner is larger, the cooling range is larger, and the integral temperature difference of the burner is reduced.
The utility model discloses can outwards spout compressed air with the help of a plurality of apertures that distribute annularly in order to form the shielding air curtain, avoid flame to directly lick the burning to the nozzle, reduce the temperature of nozzle surface, avoid the erosion of interior high temperature of stove to the nozzle to cause the nozzle radial fracture, and promoted the cooling effect, prolonged life; the utility model discloses on overall structure, change into a whole by original multilayer components of a whole that can function independently nested structure, do not have the gap between every laminar flow way, so the coal slurry can not produce the problem of carbon deposit because the card goes into in the gap, has improved the security and the reliability of production, work load when having reduced dismouting and maintenance nozzle, and small in size compactness.
Drawings
FIG. 1 is a view of a rotary cross section of the present invention;
FIG. 2 is a view showing the installation position of the air pipe according to the present invention;
fig. 3 is a structural view of a second spiral plate of the present invention;
fig. 4 is a structural view of a first spiral plate of the present invention;
fig. 5 is a trend diagram of the spiral water channel of the present invention.
Detailed Description
As shown in fig. 1 to 5, a burner structure of a gasification furnace with a spiral flow channel comprises a burner shell 9, a liquid inlet pipe 2, a vent pipe 11, a first air inlet pipe 4, a second air inlet pipe 1, a compressed air pipe 3, a water inlet pipe 5 and a water outlet pipe 6; a cone opening part 10 is formed at the upper end of the burner shell 9, a backing ring 91 is formed outwards on the outer side of the upper end of the burner shell 9, the backing ring 91 is arranged below the cone opening part 10, a vertically distributed liquid inlet pipe 2 is sealed and fixedly inserted at the lower end of the burner shell 9, and the upper end of the liquid inlet pipe 2 is arranged below the cone opening part 10; the outer side of the liquid inlet pipe 2 is outwards provided with at least one first spiral plate 14, the outer sides of the first spiral plates 14 are fixed on the inner wall of the burner shell 9, and one end of a first air inlet pipe 4 is inserted and fixed at the bottom of one side of the burner shell 9 and is communicated with the inside of the burner shell 9; the vent pipe 11 is vertically arranged inside the liquid inlet pipe 2, the lower end of the vent pipe is closed, at least one second spiral plate 13 is formed outside the vent pipe 11, and the outer sides of the second spiral plates 13 are fixed on the inner wall of the liquid inlet pipe 2; one end of a second air inlet pipe 1 penetrates through one side of the liquid inlet pipe 2, is inserted into one side of the lower end of the vent pipe 11 and is communicated with the interior of the vent pipe 11, and the second air inlet pipe 1 is arranged below the burner shell 9; a spiral water channel 7 is formed inside the burner shell 9, one end of the spiral water channel 7 is arranged at the lower end of the burner shell 9, the other end of the spiral water channel 7 is wound upwards to the upper end of the conical opening part 10 and then downwards to the lower end of the burner shell 9, and one ends of the water inlet pipe 5 and the water outlet pipe 6 are inserted and fixed at the lower end of the burner shell 9 and are respectively communicated with two ends of the spiral water channel 7; a spacer layer 15 is formed inside the burner shell 9 and the conical opening part 10, the spacer layer 15 is sleeved outside the spiral water channel 7, and one end of the compressed air pipe 3 is inserted and fixed on one side of the burner shell 9 and communicated with the inner wall of the lower end of the spacer layer 15; a plurality of small holes 12 distributed circumferentially are formed in the outer side of the conical opening portion 10 and the outer side of the upper end of the burner shell 9, and the inner end of each small hole 12 is communicated with the inside of the spacer layer 15.
The working principle is as follows: introducing pressurized pure oxygen or oxygen-enriched gas into the burner shell 9 through a first gas inlet pipe 4, simultaneously introducing the pressurized pure oxygen or oxygen-enriched gas into a vent pipe 11 through a second gas inlet pipe 1, and then introducing the water-coal-slurry fluid into the lower end of a liquid inlet pipe 2 so as to spirally flow upwards along a second spiral plate 13; pure oxygen or oxygen-enriched gas introduced into the burner shell 9 flows upwards along the first spiral plate 14 in a spiral mode to generate an angular movement speed, and gas coming out of the upper end of the inner portion of the vent pipe 11 is mixed with gas rising from the inner portion of the burner shell 9 and water-coal-slurry fluid in the mixing cavity 8 at the upper end of the burner shell 9, so that the water-coal-slurry fluid is impacted, fully diffused and atomized, and then enters the conical opening portion 10 to be combusted; then cooling water enters the spiral water channel 7 through the water inlet pipe 5, and flows out of the water outlet pipe 6 after the cooling water circularly rises and circularly falls along the spiral water channel 7, so that the cone part 10 is cooled through the inner wall of the burner shell 9, and the cone part 10 is prevented from annealing due to overheating, and further the metal structure is damaged; meanwhile, compressed air enters the jacket layer 15 through the compressed air pipe 3 and is uniformly filled in the whole jacket layer 15, then the compressed air rises and is sprayed out through the small holes 12, a thin air curtain is further formed outside the cone opening part 10 and is used for isolating flame and incandescent gas in the boiler, the surface temperature of the outer end of the cone opening part 10 is reduced, meanwhile, high-temperature and high-pressure oxygen is prevented from reacting with materials at the cone opening part 10 to cause metal oxidation, and the service life is effectively prolonged.
Normally, the spiral direction of the second spiral plate 13 and the spiral direction of the first spiral plate 14 may be opposite or the same; however, under the condition of long-term low-load operation, the spiral direction of the second spiral plate 13 and the spiral direction of the first spiral plate 14 must be opposite, and the opposite direction can enable the pure oxygen or oxygen-enriched gas on the first spiral plate 14 and the coal water slurry fluid on the second spiral plate 13 to have opposite angular motions, so that the relative speed between the high-pressure oxygen and the coal water slurry fluid is increased, and further the impact force is increased, thereby realizing sufficient mixing and promoting the coal water slurry fluid to be better solidified.
The number of the second spiral plates 13 may be one or more to form a multi-line spiral direction, and the number of the first spiral plates 14 may be one or more to form a multi-line spiral direction; the multi-thread spiral direction can better increase the rigidity of the burner and better disperse vibration during high-load operation, thereby prolonging the service life of the burner.
In the water-coal-slurry gasification process, a burner of a gasification furnace is used for atomizing water-coal-slurry serving as fuel and then spraying the atomized water-coal-slurry into the gasification furnace for combustion; the coal water slurry is a low-pollution, high-efficiency and pipelineable oil-substituting coal-based fluid fuel which is obtained by physically processing about 65 percent of coal, 34 percent of water and 1 percent of additive; the existing burner is characterized in that three layers of pipelines with gradually increased pipe diameters are sleeved together, high-pressure oxygen is introduced into an inner pipe and an outer pipe during combustion, and coal water slurry is introduced into a middle pipe. Mixing the coal water slurry with the high-pressure gas at the tail end close to the outlet of the burner, spraying the mixture out from the outlet of the burner, rapidly expanding the volume of the gas at the moment of spraying, dispersing and atomizing the coal water slurry into fine particles, and fully burning the fine particles in a hearth; the above structure has several disadvantages:
1. the rigidity of the burner is insufficient, because three layers of mutually nested runners are only welded through a few supporting plates, fluid can vibrate when passing through the runners, high-pressure oxygen and water-coal slurry can vibrate at different frequencies when flowing at high speed in the three layers of runners, and the vibration can generate continuous impact on the supporting plates between the runners, so that cracks appear on welding seams between the supporting plates and the runners;
2. the coal water slurry and the oxygen are not fully mixed, the flowing directions of the coal water slurry and the high-pressure oxygen are the same, especially when the coal water slurry works under the condition of low load, the spraying speeds of the coal water slurry and the oxygen are insufficient, the coal water slurry and the oxygen are difficult to be fully mixed and atomized, the coal water slurry cannot be fully combusted, and the combustion efficiency is reduced;
3. the burner is complex in structure, and carbon deposition is easily formed in the coal water slurry in a narrow gap by the aid of the nested structure of the three layers of runners. The carbon deposits can form adhesion between the flow channels, so that the fuel and the high-pressure oxygen are prevented from passing through, and the disassembly and cleaning work of the burner during maintenance is also prevented.
4. The cooling water pipe is externally arranged and spirally coiled on the burner, so that carbon deposition is easily generated, and the difficulty in disassembly and assembly is caused.
In conclusion, the existing gasifier burner structure has short service life and frequent maintenance, and the burner needs to be shut down for cooling when being maintained or replaced, so that the whole production process flow is greatly influenced, and the economic loss is large;
the first spiral plate 14 and the second spiral plate 13 of the utility model not only improve the rigidity of the burner, but also connect the three layers of runners into a whole closely and support each other; the coaxiality of the burner is ensured, so that the processing error, the assembly error and the thermal deformation of the flow channel are limited, the spatial distribution of each part in the flow channel is more uniform, and the flow channel is smoother; meanwhile, the first spiral plate 14 and the second spiral plate 13 effectively disperse vibration, and the probability of mechanical failure is reduced; the first spiral plate 14 and the second spiral plate 13 also respectively accelerate the flow velocity of oxygen and fluid and change the direction of the oxygen and the fluid into a spiral direction, the mixing time in the mixing cavity 8 is longer, the mixing is more sufficient, the atomization effect of the coal water slurry is better, and the combustion is quicker after the coal water slurry is sprayed out of the burner; in addition, the spirally sprayed coal water slurry has a certain protection effect on the burner, and because the spirally sprayed coal water slurry and the high-pressure oxygen can form a black area with lower temperature in a certain range at the outlet, the radial cracking of the burner caused by the erosion of the burner by the high temperature in the furnace is avoided; the utility model also integrates the cooling water channel into the burner to replace an external cooling spiral water pipe, thereby not only protecting the fragile cooling water channel, but also reducing the risk of cracking of the weak part of the welding line, and omitting frequent maintenance and disassembly of the external cooling spiral water pipe; meanwhile, the heat exchange efficiency is improved, the contact area of cooling water and the burner is larger, the cooling range is larger, and the integral temperature difference of the burner is reduced;
the utility model discloses can outwards spout compressed air with the help of a plurality of apertures 12 that distribute annularly in order to form the shielding air curtain, avoid flame to directly lick the burning to the nozzle, reduce the temperature of nozzle surface, avoid the erosion of interior high temperature to the nozzle of stove to cause the nozzle radial fracture, and promoted the cooling effect, prolonged life; the utility model discloses on overall structure, change into a whole by original multilayer components of a whole that can function independently nested structure, do not have the gap between every laminar flow way, so the coal slurry can not produce the problem of carbon deposit because the card goes into in the gap, has improved the security and the reliability of production, work load when having reduced dismouting and maintenance nozzle, and small in size compactness.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (4)
1. A gasifier burner structure with a spiral flow channel comprises a burner shell, a liquid inlet pipe, a vent pipe, a first air inlet pipe, a second air inlet pipe, a compressed air pipe, a water inlet pipe and a water outlet pipe, and is characterized in that a cone opening part is formed at the upper end of the burner shell, a backing ring is outwards formed at the outer side of the upper end of the burner shell, the backing ring is arranged below the cone opening part, the lower end of the burner shell is sealed and vertically distributed liquid inlet pipes are fixedly inserted in the lower end of the burner shell, and the upper end of the liquid inlet pipe is arranged below the cone opening part; the outer side of the liquid inlet pipe is outwards provided with at least one first spiral plate, the outer sides of the first spiral plates are fixed on the inner wall of the burner shell, and one end of the first air inlet pipe is inserted and fixed at the bottom of one side of the burner shell and communicated with the inside of the burner shell; the vent pipe is vertically arranged inside the liquid inlet pipe, the lower end of the vent pipe is closed, at least one second spiral plate is outwards formed on the outer side of the vent pipe, and the outer sides of the second spiral plates are fixed on the inner wall of the liquid inlet pipe; one end of the second air inlet pipe penetrates through one side of the liquid inlet pipe, is inserted into one side of the lower end of the vent pipe and is fixedly connected with the interior of the vent pipe, and the second air inlet pipe is arranged below the burner shell; a spiral water channel is formed inside the burner shell, and one ends of the water inlet pipe and the water outlet pipe are inserted and fixed at the lower end of the burner shell and are respectively communicated with the two ends of the spiral water channel; the burner is characterized in that a spacer layer is formed inside the burner shell and the conical opening part, and one end of the compressed air pipe is inserted into one side of the burner shell and is communicated with the inner wall of the lower end of the spacer layer.
2. The spiral flow path gasifier burner structure as claimed in claim 1, wherein one end of said spiral water path is disposed at a lower end of the burner housing, and another end of said spiral water path is wound upward to an upper end of the tapered portion and then downward to a lower end of the burner housing.
3. The spiral runner gasifier burner structure of claim 1, wherein the spacer layer is sleeved outside the spiral runner.
4. The spiral-flow-channel gasifier burner structure as claimed in claim 1, wherein a plurality of small holes distributed circumferentially are formed in the outer side of the conical opening and the outer side of the upper end of the burner housing, and the inner end of each small hole is communicated with the inside of the spacer layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921100477.1U CN210314136U (en) | 2019-07-14 | 2019-07-14 | Gasifier burner structure with spiral flow channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921100477.1U CN210314136U (en) | 2019-07-14 | 2019-07-14 | Gasifier burner structure with spiral flow channel |
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| CN210314136U true CN210314136U (en) | 2020-04-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110283627A (en) * | 2019-07-14 | 2019-09-27 | 南京湛泸科技有限公司 | A kind of gasifier nozzle structure of helical flow path |
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2019
- 2019-07-14 CN CN201921100477.1U patent/CN210314136U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110283627A (en) * | 2019-07-14 | 2019-09-27 | 南京湛泸科技有限公司 | A kind of gasifier nozzle structure of helical flow path |
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