CN220892230U - Fire pumping device and burner using same - Google Patents
Fire pumping device and burner using same Download PDFInfo
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- CN220892230U CN220892230U CN202322529654.0U CN202322529654U CN220892230U CN 220892230 U CN220892230 U CN 220892230U CN 202322529654 U CN202322529654 U CN 202322529654U CN 220892230 U CN220892230 U CN 220892230U
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- 238000005086 pumping Methods 0.000 title claims abstract description 71
- 238000002485 combustion reaction Methods 0.000 claims abstract description 107
- 238000000605 extraction Methods 0.000 claims abstract description 50
- 239000003245 coal Substances 0.000 claims abstract description 29
- 239000007921 spray Substances 0.000 claims abstract description 27
- 230000009286 beneficial effect Effects 0.000 description 13
- 239000007789 gas Substances 0.000 description 13
- 239000000843 powder Substances 0.000 description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model relates to the technical field of power plant equipment, in particular to a fire extraction device and a burner applied to the fire extraction device, wherein the fire extraction device comprises a combustion cylinder and a fire extraction pipe, the fire extraction pipe is distributed on the outer wall side of the combustion cylinder, a fire extraction inlet ring is arranged at the outlet end of the combustion cylinder, a fire extraction outlet ring is arranged at the inlet end of the combustion cylinder, a plurality of fire extraction inclined inlet holes are arranged on the fire extraction inlet ring, a plurality of fire extraction inclined outlet holes are arranged on the fire extraction outlet ring, the fire extraction inclined inlet holes and the fire extraction inclined outlet holes are connected through the fire extraction pipe, at least one compressed gas spray head is arranged in the fire extraction pipe, and the outlet of the compressed gas spray head is in the same direction as the fire extraction direction; the fire suction inlet ring is of a shrinkage structure outwards, and the inside of the outlet end of the combustion cylinder is of an outward expansion horn shape. The fire pumping device can pump part of flame combusted at the front end of the burner to the rear end of the burner, so that stable combustion of pulverized coal in the burner is realized, and an igniter is not required to continuously work for a long time.
Description
Technical Field
The utility model relates to a fire pumping device and a burner applied to the fire pumping device, and belongs to the technical field of power plant equipment.
Background
The thermal power plant is a plant for producing electric energy by using coal, petroleum and natural gas as fuel, and the basic production process is as follows: the fuel is combusted in the boiler to heat water to form steam, chemical energy of the fuel is converted into heat energy, steam pressure pushes the turbine to rotate, heat energy is converted into mechanical energy, and then the turbine drives the generator to rotate, so that the mechanical energy is converted into electric energy.
The burner in the thermal power plant is a device matched with a boiler, and the burner is a device for spraying and mixing fuel and air in a certain mode for combustion. The self-sustaining stable combustion performance of the burner is always a research hotspot in the prior art, chinese patent CN205717183U discloses a pure oxygen stable combustion burner and a stable combustion device thereof, oxygen is sprayed into a hearth at a certain angle through an oxygen spray gun, so that the oxygen rapidly enters into pulverized coal flame, combustion is facilitated, and the stable combustion is mainly realized by supplementing oxygen in the burner. The Chinese patent application CN112325284A discloses a low-load stable combustion burner, which comprises a coal powder nozzle body, a dilute phase coal powder nozzle, a perimeter wind nozzle, a dense phase coal powder pipeline, a supporting plate, a Venturi concentrator, a flame stable combustion device and a dilute phase spoiler, wherein the coal powder nozzle body is connected with the dilute phase coal powder nozzle, the perimeter wind nozzle, the dilute phase coal powder nozzle, the dense phase coal powder pipeline and the flame stable combustion device are sequentially nested from outside to inside, the Venturi concentrator is arranged on the inner wall of the coal powder nozzle body, the dilute phase spoiler is annularly arranged between the dense phase coal powder pipeline and the dilute phase coal powder nozzle, and the coal powder airflow entering the burner is concentrated through the Venturi concentrator to form the dense-thin coal powder airflow with the center and the periphery so as to achieve the effects of ignition and stable combustion, but the disclosed structural modes still can not solve the unbalanced problems of front and back combustion flame and heat in the burner.
Disclosure of utility model
Aiming at the defects in the prior art, the utility model provides the fire pumping device and the burner applied by the fire pumping device, wherein the fire pumping device can pump part of flame burnt at the front end of the burner to the rear end of the burner, so that stable combustion of pulverized coal in the burner is realized, and an igniter is not required to continuously work for a long time.
The technical scheme for solving the technical problems is as follows: the fire pumping device comprises a combustion cylinder and a fire pumping pipe, wherein the fire pumping pipe is distributed on the outer wall side of the combustion cylinder, a fire pumping inlet ring is arranged at the outlet end of the combustion cylinder, a fire pumping outlet ring is arranged at the inlet end of the combustion cylinder, a plurality of fire pumping inclined inlet holes are arranged on the fire pumping inlet ring, a plurality of fire pumping inclined outlet holes are arranged on the fire pumping outlet ring, the fire pumping inclined inlet holes and the fire pumping inclined outlet holes are connected through the fire pumping pipe, at least one compressed gas spray nozzle is arranged in the fire pumping pipe, and the outlet of the compressed gas spray nozzle is in the same direction as the fire pumping direction; the fire suction inlet ring is of a shrinkage structure outwards, and the inside of the outlet end of the combustion cylinder is of an outward expansion horn shape.
Based on the technical scheme, the utility model can also be improved as follows:
Further, the fire pumping device comprises an outer sleeve, the fire pumping pipe is positioned in the outer sleeve, an air inlet is formed in the outer sleeve, and the air inlet is communicated with the inlet of the compressed air spray head.
The beneficial effects of adopting the further scheme are as follows: through the air inlet lets in compressed air in to the outer sleeve, compressed air can pass through the fire tube through the compressed gas nozzle fast, forms the negative pressure in the fire tube to the buggy of burning at the combustion cylinder exit end can be taken out to the entrance point of combustion cylinder through the fire tube, thereby realizes the self-sustaining steady burning of buggy in the combustion cylinder, and compressed air encircles the outer wall at the fire tube moreover, can play the cooling effect to the outer wall of fire tube, avoids the fire tube long-term high temperature by burning out.
Further, two compressed gas spray heads are arranged in each fire suction pipe, one compressed gas spray head is arranged at the joint of each fire suction pipe and each fire suction inclined inlet hole, and one compressed gas spray head is arranged at the joint of each fire suction pipe and each fire suction inclined outlet hole.
The beneficial effects of adopting the further scheme are as follows: the arrangement of the two compressed gas spray heads can effectively improve the fire pumping efficiency.
Further, the inlet end of the combustion cylinder and the outlet end of the combustion cylinder are in a shape of a flared horn which is symmetrically arranged.
The beneficial effects of adopting the further scheme are as follows: the inlet end of the combustion cylinder and the outlet end of the combustion cylinder are symmetrically arranged, so that the installation is convenient; the structural arrangement of the inlet end of the combustion cylinder is more beneficial to the focused combustion of coal dust and flame at the inlet end of the combustion cylinder; the structure of the outlet end of the combustion cylinder plays a role in decelerating coal dust and flame at the outlet end of the combustion cylinder, and is more beneficial to the fire pumping process.
Further, the flaring angle of the inlet end of the combustion cylinder and the outlet end of the combustion cylinder is 5-15 degrees.
The beneficial effects of adopting the further scheme are as follows: the setting of the flaring horn-shaped angle is convenient for processing between the inlet end of the combustion cylinder and the outlet end of the combustion cylinder, and the fire pumping and stable combustion effects are better.
Further, the included angle between the fire pumping inclined inlet hole and the central axis of the combustion cylinder is 30-60 degrees.
The beneficial effects of adopting the further scheme are as follows: the angle setting of taking out fire oblique inlet port is more favorable to promoting and takes out fire efficiency.
Further, the included angle between the fire pumping inclined outlet hole and the central axis of the combustion cylinder is 30-60 degrees.
The beneficial effects of adopting the further scheme are as follows: the angle setting of the inclined fire-pumping outlet is more beneficial to the formation of a fire core by the internal combustion of the flame in the combustion cylinder.
The utility model also discloses a burner which comprises the fire pumping device and an igniter, wherein the ignition position of the igniter is positioned at the inlet end of the combustion cylinder, and the combustion cylinder is communicated with the primary air inlet of the pulverized coal.
The beneficial effects of the utility model are as follows: the pulverized coal primary air is introduced into the combustion cylinder, the igniter ignites the pulverized coal in the combustion cylinder, the pulverized coal burns in the combustion cylinder, compressed air is introduced into the compressed air spray head, the compressed air is rapidly sprayed out of the compressed air spray head, negative pressure is formed in the fire extraction pipe, partial flame at the outlet end of the combustion cylinder can be extracted to the inlet end of the combustion cylinder through the fire extraction pipe to ignite the pulverized coal primary air which just enters the combustion cylinder, self-sustaining stable combustion of the pulverized coal in the combustion cylinder is realized, the igniter does not need to continuously work, the fire extraction efficiency can be adjusted only by adjusting the flow of the compressed air, so that the condition adjustment of self-sustaining stable combustion is realized, and the ignition energy is reduced.
Drawings
FIG. 1 is a schematic view of the internal structure of a fire pumping apparatus according to an embodiment;
FIG. 2 is a perspective view of the fire extraction device according to the embodiment;
FIG. 3 is an internal cross-sectional view of the firestop device according to the embodiment;
In the figure, 1, a combustion cylinder; 2. a fire extraction pipe; 3. a fire extraction inlet ring; 4. a fire extraction outlet ring; 5. drawing fire and obliquely feeding holes; 6. drawing fire and obliquely discharging holes; 7. a compressed gas nozzle; 8. an outer sleeve; 9. an air inlet.
Detailed Description
The following describes the present utility model in detail. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, so that the utility model is not limited to the specific embodiments disclosed.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As shown in fig. 1, the fire extraction device comprises a combustion cylinder 1 and a fire extraction pipe 2, wherein the fire extraction pipe 2 is distributed on the outer wall side of the combustion cylinder 1, a fire extraction inlet ring 3 is arranged at the outlet end of the combustion cylinder 1, a fire extraction outlet ring 4 is arranged at the inlet end of the combustion cylinder 1, a plurality of fire extraction inclined inlet holes 5 are arranged on the fire extraction inlet ring 3, a plurality of fire extraction inclined outlet holes 6 are arranged on the fire extraction outlet ring 4, the fire extraction inclined inlet holes 5 and the fire extraction inclined outlet holes 6 are connected through the fire extraction pipe 2, at least one compressed gas spray head 7 is arranged in the fire extraction pipe 2, and the outlet of the compressed gas spray head 7 is in the same direction as the fire extraction direction; the fire suction inlet ring 3 is of a contracted structure outwards, and the inside of the outlet end of the combustion cylinder 1 is of an outwards-expanded horn shape.
Specifically, as shown in fig. 1-2, the fire-pumping device comprises an outer sleeve 8, the fire-pumping pipe 2 is positioned in the outer sleeve 8, an air inlet 9 is arranged on the outer sleeve 8, and the air inlet 9 is communicated with the inlet of the compressed air spray head 7. Compressed air is introduced into the outer sleeve 8 through the air inlet 9, the compressed air can enter the compressed air spray head 7 to realize the fire pumping process, and meanwhile, the compressed air entering the outer sleeve 8 can cool the outer wall of the fire pumping pipe 2 to prevent the fire pumping pipe 2 from being burnt out.
Specifically, two compressed gas spray heads 7 are arranged in each fire suction pipe 2, one compressed gas spray head 7 is arranged at the joint of each fire suction pipe 2 and each fire suction inclined inlet hole 5, and one compressed gas spray head 7 is arranged at the joint of each fire suction pipe 2 and each fire suction inclined outlet hole 6.
Specifically, as shown in fig. 3, the inlet end of the combustion cylinder 1 and the outlet end of the combustion cylinder 1 are in a shape of a flared horn which is symmetrically arranged. The inlet end of the combustion cylinder 1 and the outlet end of the combustion cylinder 1 are symmetrically arranged, so that the installation is convenient, and the installation direction of the combustion cylinder 1 is not required to be considered during the installation; the outward-expansion horn-shaped structure of the inlet end of the combustion cylinder 1 is more beneficial to the focused combustion of coal dust and flame at the inlet end of the combustion cylinder 1, so that a flame kernel is formed; the structure setting of combustion bowl 1 exit end plays the deceleration effect to the buggy and the flame of combustion bowl 1 exit end, more does benefit to going on of taking out the fire process, improves and takes out fire efficiency.
Specifically, the flaring angle of the inlet end of the combustion cylinder 1 and the outlet end of the combustion cylinder 1 is 5 degrees to 15 degrees.
Specifically, the included angle between the fire-drawing inclined inlet hole 5 and the central axis of the combustion cylinder 1 is 30-60 degrees.
Specifically, the included angle between the fire-pumping inclined outlet hole 6 and the central axis of the combustion cylinder 1 is 30-60 degrees.
More specifically, the included angle between the fire-pumping inclined inlet 5 and the central axis of the combustion cylinder 1 is 45 degrees; the included angle between the fire-sucking inclined outlet hole 6 and the central axis of the combustion cylinder 1 is 45 degrees.
The angle of the fire pumping inclined inlet hole 5 is beneficial to improving fire pumping efficiency, so that flames in the combustion cylinder 1 are more easily pumped into the fire pumping pipe 2. The angle of the fire pumping inclined outlet hole 6 is more beneficial to the formation of a fire core by the focused combustion of flame in the combustion cylinder 1, so that the ignition of pulverized coal primary air is facilitated, the self-sustaining stable combustion of the burner is realized, the ignition power is reduced, and the service life of the igniter is prolonged.
A burner, the burner includes the fire-pulling device and the igniter in this embodiment, the ignition position of the igniter is located at the inlet end of the combustion cylinder 1, and the combustion cylinder 1 is communicated with the primary air inlet of pulverized coal. The igniter may be a conventional plasma igniter.
Working principle:
The method comprises the steps that pulverized coal primary air is introduced into a combustion cylinder 1, an igniter ignites pulverized coal in the combustion cylinder 1, the pulverized coal burns in the combustion cylinder 1, compressed air is introduced into a compressed air spray head 7, the compressed air is rapidly sprayed out of the compressed air spray head 7, negative pressure is formed in a fire extraction pipe 2, part of flame at the outlet end of the combustion cylinder 1 can be pumped back to the inlet end of the combustion cylinder 1 through the fire extraction pipe 2 to ignite the pulverized coal primary air just entering the combustion cylinder 1, self-sustaining stable combustion of the pulverized coal in the combustion cylinder 1 is realized, the igniter does not need to continuously work, and the fire extraction efficiency can be adjusted only by adjusting the flow of the compressed air, so that self-sustaining stable combustion condition adjustment is realized, and ignition energy is reduced;
The adjustment of the fire pumping amount is realized by adjusting the flow of the compressed air, when the flame at the inlet end of the combustion cylinder 1 is poor, the flow of the compressed air is increased, so that more flame can be pumped to the inlet end of the combustion cylinder 1, the temperature of the fire pumping pipe 2 is higher and is easy to burn out due to the increase of the fire pumping amount, but because the increase of the fire pumping amount is realized by increasing the flow of the compressed air, the high-efficiency cooling of the outer wall of the fire pumping pipe 2 can be realized by increasing the flow of the compressed air, and the fire pumping pipe 2 is well protected, so that the fire pumping device can realize balanced fire pumping and cooling protection, and has good application performance.
The technical features of the above-described embodiments may be arbitrarily combined, and in order to simplify the description, all possible combinations of the technical features in the above-described embodiments are not exhaustive, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present utility model without departing from the spirit or scope of the utility model as defined in the appended claims.
Claims (8)
1. The fire pumping device is characterized by comprising a combustion cylinder (1) and fire pumping pipes (2), wherein the fire pumping pipes (2) are distributed on the outer wall side of the combustion cylinder (1), a fire pumping inlet ring (3) is arranged at the outlet end of the combustion cylinder (1), a fire pumping outlet ring (4) is arranged at the inlet end of the combustion cylinder (1), a plurality of fire pumping inclined inlet holes (5) are arranged on the fire pumping inlet ring (3), a plurality of fire pumping inclined outlet holes (6) are arranged on the fire pumping outlet ring (4), the fire pumping inclined inlet holes (5) and the fire pumping inclined outlet holes (6) are connected through the fire pumping pipes (2), at least one compressed gas spray head (7) is arranged in the fire pumping pipes (2), and the outlet of the compressed gas spray head (7) is in the same direction with the fire pumping direction; the fire suction inlet ring (3) is of a contracted structure outwards, and the inside of the outlet end of the combustion cylinder (1) is of an outwards-expanded horn shape.
2. A fire extraction device according to claim 1, characterized in that the fire extraction device comprises an outer sleeve (8), the fire extraction tube (2) is located in the outer sleeve (8), an air inlet (9) is arranged on the outer sleeve (8), and the air inlet (9) is communicated with the inlet of the compressed gas spray head (7).
3. The fire pumping device according to claim 1, wherein two compressed gas spray nozzles (7) are arranged in each fire pumping pipe (2), one compressed gas spray nozzle (7) is arranged at the joint of each fire pumping pipe (2) and each fire pumping inclined inlet hole (5), and one compressed gas spray nozzle (7) is arranged at the joint of each fire pumping pipe (2) and each fire pumping inclined outlet hole (6).
4. A fire extraction device according to claim 1, characterized in that the inlet end of the combustion cylinder (1) and the outlet end of the combustion cylinder (1) are in the form of a symmetrically arranged flared horn.
5. A fire extraction apparatus according to claim 4, wherein the flaring angle between the inlet end of the combustion bowl (1) and the outlet end of the combustion bowl (1) is 5 ° -15 °.
6. A fire extraction device according to claim 1, characterized in that the angle between the fire extraction inclined inlet (5) and the central axis of the combustion cylinder (1) is 30 ° -60 °.
7. A fire extraction device according to claim 1, characterized in that the angle between the fire extraction inclined outlet (6) and the central axis of the combustion cylinder (1) is 30 ° -60 °.
8. A burner, characterized in that the burner comprises a fire extraction device as claimed in any one of claims 1-7 and an igniter, the ignition position of the igniter is located at the inlet end of the combustion cylinder (1), and the combustion cylinder (1) is communicated with a pulverized coal primary air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322529654.0U CN220892230U (en) | 2023-09-18 | 2023-09-18 | Fire pumping device and burner using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322529654.0U CN220892230U (en) | 2023-09-18 | 2023-09-18 | Fire pumping device and burner using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220892230U true CN220892230U (en) | 2024-05-03 |
Family
ID=90867848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322529654.0U Active CN220892230U (en) | 2023-09-18 | 2023-09-18 | Fire pumping device and burner using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220892230U (en) |
-
2023
- 2023-09-18 CN CN202322529654.0U patent/CN220892230U/en active Active
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