CN113915640A - Pulverized coal ignition device - Google Patents
Pulverized coal ignition device Download PDFInfo
- Publication number
- CN113915640A CN113915640A CN202111427757.5A CN202111427757A CN113915640A CN 113915640 A CN113915640 A CN 113915640A CN 202111427757 A CN202111427757 A CN 202111427757A CN 113915640 A CN113915640 A CN 113915640A
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- CN
- China
- Prior art keywords
- hot air
- internal combustion
- pulverized coal
- ignition device
- combustion cylinder
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003245 coal Substances 0.000 title claims abstract description 56
- 238000002485 combustion reaction Methods 0.000 claims abstract description 82
- 239000000843 powder Substances 0.000 claims abstract description 59
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 150000002835 noble gases Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/02—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs for igniting solid fuel
- F23Q7/04—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs for igniting solid fuel with fans for transfer of heat to fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q13/00—Igniters not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q13/00—Igniters not otherwise provided for
- F23Q13/02—Igniters not otherwise provided for using gas burners, e.g. gas pokers
Abstract
The invention discloses a pulverized coal ignition device, comprising: a barrel; the internal combustion cylinder is arranged in the inner cavity of the cylinder body; the air-powder channel is communicated with the inner cavity of the cylinder body and is used for conveying air-powder airflow to the internal combustion cylinder; the ignition device comprises an ignition source arranged at an inlet of the internal combustion cylinder or an inlet end of a chamber of the internal combustion cylinder; a hot air device comprising at least one first hot air outlet provided at an inlet of the internal combustion cylinder, in a chamber of the internal combustion cylinder and/or at an outlet of the internal combustion cylinder, the hot air device being configured to: when the pulverized coal ignition device works, hot air is output from the first hot air outlet, and the temperature of the hot air is higher than the temperature of the air-powder airflow entering the internal combustion cylinder and lower than the ignition point of the air-powder airflow.
Description
Technical Field
The invention relates to the field of pulverized coal combustion, in particular to a pulverized coal ignition device.
Background
The oil-saving ignition technology of the coal-fired boiler has been applied in domestic industry for more than 20 years, and the deep development of the oil-saving ignition technology is still needed based on the accumulation of the internal combustion ignition technology for many years, so that the oil-saving ignition technology has important significance for the continuous application and development of the oil-saving ignition technology.
The oil-saving ignition combustor is an internal combustion type combustor, and the pulverized coal is directly ignited by an ignition source in a core ignition area of the internal combustion type combustor. The condition that the pulverized coal is ignited and continuously combusted is that the pulverized coal needs to be influenced by multiple parameters such as proper wind speed, temperature, pulverized coal concentration, initial energy for igniting the pulverized coal and the like, the temperature of wind-powder airflow is primary wind temperature before the pulverized coal contacts an ignition source in conventional internal combustion ignition, the temperature has a large difference from the ignition temperature of the pulverized coal airflow, so that the pulverized coal can be ignited only by inputting high ignition energy when the ignition source ignites, and the range of adapting to the ignited coal quality is narrow.
Disclosure of Invention
The invention aims to provide a coal powder ignition device which is easy to ignite coal powder and is suitable for ignition and wide in coal quality range.
The invention discloses a pulverized coal ignition device, comprising:
a barrel;
the internal combustion cylinder is arranged in the inner cavity of the cylinder body;
the air-powder channel is communicated with the inner cavity of the cylinder body and is used for conveying air-powder airflow to the internal combustion cylinder;
the ignition device comprises an ignition source arranged at an inlet of the internal combustion cylinder or an inlet end of a chamber of the internal combustion cylinder;
a hot air device comprising at least one first hot air outlet provided at an inlet of the internal combustion cylinder, in a chamber of the internal combustion cylinder and/or at an outlet of the internal combustion cylinder, the hot air device being configured to: when the pulverized coal ignition device works, hot air is output from the first hot air outlet, and the temperature of the hot air is higher than the temperature of the air-powder airflow entering the internal combustion cylinder and lower than the ignition point of the air-powder airflow.
In some embodiments, the hot air device further comprises a second hot air outlet provided at the outlet end of the barrel, the hot air device being configured to: when the pulverized coal ignition device works, hot air is output from the second hot air outlet, and the temperature of the hot air is higher than the temperature of the air-powder airflow entering the internal combustion cylinder and lower than the ignition point of the air-powder airflow.
In some embodiments, the hot air device includes a plurality of the first hot air outlets arranged circumferentially and uniformly about an axis of the inner cylinder.
In some embodiments, the hot air device is configured to: the temperature of the hot air output by the first hot air outlet is 200-600 ℃.
In some embodiments, the first hot air outlet is directed downstream in the direction of flow of the pulverized air stream in the barrel.
In some embodiments, the hot air device is configured to: the included angle between the wind direction of the hot wind output by the first hot wind outlet and the axis of the barrel is 0-60 ℃.
In some embodiments, the hot air device includes a plurality of first hot air outlets, a hot air main pipeline, and a plurality of hot air branch pipelines respectively communicating the first hot air outlets and the hot air main pipeline, and a flow control valve for controlling a hot air volume of a corresponding pipeline is provided on the hot air main pipeline and/or the hot air branch pipelines.
In some embodiments, the hot air device includes a plurality of first hot air outlets, a hot air main pipeline, and a plurality of hot air branch pipelines respectively communicating the first hot air outlets and the hot air main pipeline, and a temperature regulator for regulating the temperature of hot air in the corresponding pipeline is provided on the hot air main pipeline and/or the hot air branch pipelines.
In some embodiments, the ignition device comprises a plasma generator, a fuel gun, or a gas gun.
In some embodiments, the hot air device is configured to: when the pulverized coal ignition device works, hot air pulverized coal airflow or hot air is output from the first hot air outlet.
Based on the pulverized coal ignition device provided by the invention, the first hot air outlet is arranged at the inlet of the internal combustion cylinder, in the cavity of the internal combustion cylinder and/or in the outlet of the internal combustion cylinder, and hot air with the temperature higher than the temperature of the air-powder airflow and lower than the ignition point temperature of the air-powder airflow is output from the first hot air outlet, so that the ignition condition of the air-powder airflow in an ignition area can be improved, the ignition energy input by an ignition source is reduced, and the range of the pulverized coal ignition device suitable for ignited coal quality is enlarged.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying 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 application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural view of a pulverized coal ignition device according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a pulverized coal ignition device according to another embodiment of the present invention;
fig. 3 is a schematic structural view of a pulverized coal ignition device according to still another embodiment of the present invention;
fig. 4 is a schematic structural view of a pulverized coal ignition device according to still another embodiment of the present invention;
fig. 5 is a schematic structural view of a pulverized coal ignition device according to still another embodiment of the present invention;
fig. 6 is a schematic structural view of a pulverized coal ignition device according to still another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 6, the pulverized coal ignition device of the present embodiment includes a cylinder 1, an internal combustion cylinder 2, a pulverized coal passage 3, an ignition device 4, and a hot air device.
The internal combustion cylinder 2 is arranged in the inner cavity of the cylinder body 1. The air-powder channel 3 is communicated with the inner cavity of the cylinder body 1, and the air-powder channel 3 is used for conveying air-powder airflow to the inner combustion cylinder 2.
The air-powder channel 3 conveys air-powder airflow, namely mixed airflow of air and coal powder, into the inner cavity of the cylinder 1. In the embodiment shown in the figure, the internal combustion cylinder 2 is connected with the inner wall of the cylinder body 1 through a plurality of supports, the internal combustion cylinder 2 is supported in the middle of the inner cavity of the cylinder body 1, the supports are distributed at intervals and form a radial shape, and when the wind-powder airflow passes through the internal combustion cylinder 2, one part of the wind-powder airflow enters the internal combustion cylinder 2, and the other part of the wind-powder airflow passes through the outer side of the internal combustion cylinder 2. In some embodiments, not shown in the figures, the connection between the internal combustion engine 2 and the cylinder body 1 is a sealed connection, and the air-powder airflow entering the inner cavity of the cylinder body 1 completely enters the internal combustion engine 2.
The ignition device 4 includes an ignition source 41 provided at an inlet of the internal combustion cylinder 2 or an inlet end of a chamber of the internal combustion cylinder 2. The ignition source 41 is an outlet of the ignition device and is a fire outlet for generating the flame 42, and in the embodiment shown in fig. 1, the ignition source 41 is located at an inlet of the internal combustion cylinder 2, upstream of the internal combustion cylinder 2, and in the embodiment of fig. 2, the ignition source 41 is located at an inlet end of the chamber of the internal combustion cylinder 2, i.e., at an upstream portion in the chamber of the internal combustion cylinder 2. An ignition source 41 is used to generate a flame 42 to ignite a nearby wind-powder stream.
The hot air device comprises at least one first hot air outlet 51, and the at least one first hot air outlet 51 is arranged at an inlet of the internal combustion cylinder 2, in a chamber of the internal combustion cylinder 2 and/or at an outlet of the internal combustion cylinder 2. That is, as shown in fig. 1, the first hot air outlet 51 may be provided only at the inlet of the internal combustion cylinder 2, as shown in fig. 3, the first hot air outlet 51 may be provided only in the chamber of the internal combustion cylinder 2, or the first hot air outlet 51 may be provided only at the outlet of the internal combustion cylinder 2, or the first hot air outlet 51 may be provided at the inlet of the internal combustion cylinder 2, the chamber of the internal combustion cylinder 2, and the outlet of the internal combustion cylinder 2, or the first hot air outlets 51 may be provided at two locations of the inlet of the internal combustion cylinder 2, the chamber of the internal combustion cylinder 2, and the outlet of the internal combustion cylinder 2.
The hot air device is configured to: when the pulverized coal ignition device works, hot air is output from the first hot air outlet 51, and the temperature of the hot air is higher than the temperature of the air-powder airflow entering the internal combustion cylinder 2 and lower than the ignition point of the air-powder airflow. The temperature of the hot air can heat the air-powder airflow entering the internal combustion cylinder 2, and meanwhile, the temperature of the hot air is lower than the ignition point of the air-powder airflow, so that the air-powder airflow cannot be ignited.
When the first hot air outlet is arranged at the inlet of the internal combustion cylinder 2 or in the cavity of the internal combustion cylinder 2, hot air can be conveyed to the air-powder airflow near the ignition source, the ignition condition of the air-powder airflow in an ignition area is improved, the ignition energy input by the ignition source 41 is reduced, and the range of the coal quality suitable for ignition of the pulverized coal ignition device is enlarged. When the first hot air outlet is provided at the outlet of the internal combustion cylinder 2, the un-ignited air-powder flow at the outlet of the internal combustion cylinder 2 can be heated by the hot air and can be more easily ignited by the upstream ignited air-powder flow. In this embodiment, since the first hot air outlet 51 outputs hot air with a temperature lower than the ignition point of the wind powder air flow, the hot air cannot heat the pipeline for conveying the hot air to a temperature higher than the ignition point of the wind powder air flow, the hot air pipeline cannot ignite the wind powder air flow, and the hot air cannot ignite the wind powder air flow when the ignition source is turned off, so that the wind powder air flow can only be ignited by the ignition source, the ignition of the wind powder air flow is safer and more controllable, and the system has good safety.
In some embodiments, as shown in fig. 6, the hot air device further comprises a second hot air outlet 54 provided at the outlet end of the barrel 1, the hot air device being configured to: when the pulverized coal ignition device works, hot air is output from the second hot air outlet 54, and the temperature of the hot air is higher than the temperature of the air-powder airflow entering the internal combustion cylinder 2 and lower than the ignition point of the air-powder airflow. In the present embodiment, by providing the second hot air outlet 54, after the core combustion is performed on the internal combustion cylinder 1, the air-powder flow which is not ignited and is located near the outlet of the cylinder 1 can be heated by the hot air output from the second hot air outlet 54, so that the air-powder flow can be ignited more easily.
In some embodiments, as shown in fig. 1 to 6, the hot air device includes a plurality of first hot air outlets 51, and the plurality of first hot air outlets 51 are uniformly arranged circumferentially around the axis of the internal combustion cylinder 2. That is, when the first hot air outlet 51 arranged at the inlet of the internal combustion cylinder 2 or the inlet end or the outlet of the chamber is a plurality of first hot air outlets 51 uniformly arranged along the circumferential direction, the hot air output by the arrangement can be more uniform, and the heating effect on the air-powder airflow is improved.
In some embodiments, the hot air device is configured to: the temperature of the hot air output from the first hot air outlet 51 is 200-600 ℃.
In some embodiments, the first hot air outlet 51 is directed downstream in the direction of flow of the pulverized air stream in the cartridge 1. The arrangement is favorable for the flame generated by the wind-powder airflow to develop downstream, and the combustion effect is improved.
In some embodiments, the hot air device is configured to: the included angle between the wind direction of the hot wind output by the first hot wind outlet 51 and the axis of the barrel 1 is 0-60 ℃. The angle is favorable for the flame generated by the wind-powder airflow to develop towards the downstream, and the combustion effect is improved.
In some embodiments, the hot air device includes a plurality of first hot air outlets 51, a hot air main pipe, and a plurality of hot air branch pipes respectively communicating the first hot air outlets 51 and the hot air main pipe, and a flow control valve 53 is disposed on the hot air main pipe and/or the hot air branch pipes for controlling the amount of hot air flowing through the corresponding pipes. As shown in fig. 6, flow control valves are provided on the main duct and each hot air branch duct. The main pipeline is provided with a flow control valve 53, which can uniformly control and adjust the hot air flow of each hot air branch pipeline and uniformly adjust the flow of the hot air output by the first hot air outlet 51. The flow control valves 53 are provided in the respective hot air branch ducts, and the flow rates of the hot air in the respective hot air branch ducts can be controlled and adjusted individually, so that the flow rates of the hot air output from the first hot air outlets 51 of the different hot air branch ducts are different. The embodiment can realize the adjustment of the flow of the hot air output, thereby adjusting the combustion effect of the air-powder airflow, outputting hot air with different flow through each first hot air outlet 51, and adjusting the combustion state and the combustion effect distribution condition of the air-powder airflow.
In some embodiments, the hot air device includes a plurality of first hot air outlets 51, a hot air main pipe, and a plurality of hot air branch pipes respectively communicating the first hot air outlets 51 and the hot air main pipe, and a temperature regulator 52 for regulating the temperature of the hot air in the corresponding pipe is disposed on the hot air main pipe and/or the hot air branch pipes. As shown in fig. 5, a temperature regulator 52 is provided on the main duct, and as shown in fig. 4, a temperature regulator 52 is provided on each of the main duct and the hot air branch ducts. The main duct is provided with a temperature regulator 52 capable of uniformly controlling and regulating the temperature of the hot air in each hot air branch duct and uniformly regulating the temperature of the hot air output from the first hot air outlet 51. The temperature regulators 52 are provided in the respective hot air branch ducts, and the temperatures of the hot air in the respective hot air branch ducts can be controlled and regulated individually so that the temperatures of the hot air output from the first hot air outlets 51 of the different hot air branch ducts are different. The temperature of hot-blast output can be realized adjusting to this embodiment to can adjust the combustion effect of wind powder air current, export the hot-blast of different flow through each first hot-blast export 51, can also adjust the combustion state and the combustion effect distribution condition of wind powder air current.
In some embodiments, the ignition device 4 comprises a plasma generator, a fuel gun, or a gas gun. So that the corresponding flame 42 is a plasma arc, a fuel flame or a gas flame.
In some embodiments, the temperature regulator 52 may be an electric heating device, a steam heating device, or a flue gas heating device, among others.
In some embodiments, the hot air device is configured to: when the pulverized coal ignition device works, hot air and pulverized coal airflow or hot air is output from the first hot air outlet 51. In some other embodiments, the hot air may also come from oxygen, noble gases, and the like.
Finally, it should be noted that: the above examples are only intended 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 preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. A pulverized coal ignition device, comprising:
a cylinder (1);
the internal combustion cylinder (2) is arranged in the inner cavity of the cylinder body (1);
the air-powder channel (3) is communicated with the inner cavity of the cylinder body (1) and is used for conveying air-powder airflow to the internal combustion cylinder (2);
an ignition device (4) comprising an ignition source (41) provided at the inlet of the internal combustion cylinder (2) or at the inlet end of the chamber of the internal combustion cylinder (2);
-a hot air device comprising at least one first hot air outlet (51), said at least one first hot air outlet (51) being provided at an inlet of the internal combustion drum (2), in a chamber of the internal combustion drum (2) and/or at an outlet of the internal combustion drum (2), the hot air device being configured to: when the pulverized coal ignition device works, hot air is output from the first hot air outlet (51), and the temperature of the hot air is higher than the temperature of the air-powder airflow entering the internal combustion cylinder (2) and lower than the ignition point of the air-powder airflow.
2. The pulverized coal ignition device according to claim 1, characterized in that the hot air device further comprises a second hot air outlet (54) provided at the outlet end of the barrel (1), the hot air device being configured to: when the pulverized coal ignition device works, hot air is output from the second hot air outlet (54), and the temperature of the hot air is higher than the temperature of the air-powder airflow entering the internal combustion cylinder (2) and lower than the ignition point of the air-powder airflow.
3. The pulverized coal ignition device as defined in claim 1, characterized in that the hot air device comprises a plurality of the first hot air outlets (51), the plurality of first hot air outlets (51) being circumferentially and evenly arranged around the axis of the internal combustion cylinder (2).
4. The pulverized coal ignition device as claimed in claim 1, characterized in that the hot air device is configured to: the temperature of the hot air output by the first hot air outlet (51) is 200-600 ℃.
5. Pulverized coal ignition device according to claim 1, characterized in that the first hot air outlet (51) is directed downstream in the direction of flow of the air-pulverized coal stream in the barrel (1).
6. The pulverized coal ignition device as claimed in claim 5, characterized in that the hot air device is configured to: the included angle between the wind direction of the hot wind output by the first hot wind outlet (51) and the axis of the barrel (1) is 0-60 ℃.
7. The pulverized coal ignition device according to claim 1, wherein the hot air device comprises a plurality of first hot air outlets (51), a hot air main pipe and a plurality of hot air branch pipes respectively communicating the first hot air outlets (51) and the hot air main pipe, and a flow control valve (53) for controlling the hot air volume of the corresponding pipe is arranged on the hot air main pipe and/or the hot air branch pipes.
8. The pulverized coal ignition device according to claim 1, wherein the hot air device comprises a plurality of first hot air outlets (51), a hot air main pipe and a plurality of hot air branch pipes respectively communicating the first hot air outlets (51) and the hot air main pipe, and a temperature regulator (52) for regulating the temperature of hot air in the corresponding pipe is arranged on the hot air main pipe and/or the hot air branch pipes.
9. Pulverized coal ignition device according to any of claims 1 to 8, characterized in that the ignition device (4) comprises a plasma generator, a fuel or gas gun.
10. The pulverized coal ignition device as claimed in any one of claims 1 to 8, characterized in that the hot air device is configured to: when the pulverized coal ignition device works, hot air and pulverized coal airflow or hot air is output from the first hot air outlet (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111427757.5A CN113915640A (en) | 2021-11-26 | 2021-11-26 | Pulverized coal ignition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111427757.5A CN113915640A (en) | 2021-11-26 | 2021-11-26 | Pulverized coal ignition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113915640A true CN113915640A (en) | 2022-01-11 |
Family
ID=79248488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111427757.5A Pending CN113915640A (en) | 2021-11-26 | 2021-11-26 | Pulverized coal ignition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113915640A (en) |
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2021
- 2021-11-26 CN CN202111427757.5A patent/CN113915640A/en active Pending
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