CN114017795A - Pulverized coal ignition device - Google Patents
Pulverized coal ignition device Download PDFInfo
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- CN114017795A CN114017795A CN202111422211.0A CN202111422211A CN114017795A CN 114017795 A CN114017795 A CN 114017795A CN 202111422211 A CN202111422211 A CN 202111422211A CN 114017795 A CN114017795 A CN 114017795A
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- pulverized coal
- hot air
- air
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- 239000003245 coal Substances 0.000 title claims abstract description 114
- 239000000843 powder Substances 0.000 claims abstract description 181
- 238000002485 combustion reaction Methods 0.000 claims abstract description 76
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000010304 firing Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 14
- 239000000446 fuel Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011144 upstream manufacturing 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
- 239000002817 coal dust Substances 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
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a pulverized coal ignition device, comprising: a barrel; the internal combustion cylinder is arranged in the inner cavity of the cylinder body; the air powder pipeline is communicated with the inner cavity of the cylinder body; the ignition device comprises an ignition port; the auxiliary hot air powder pipe comprises a pre-burning pipe surrounding the ignition port and a mixing pipe communicated with the pre-burning pipe; the pulverized coal pipe is communicated with the mixing pipe and is configured to convey pulverized coal to the mixing pipe when the pulverized coal ignition device is ignited to work; a hot air device comprising a hot air duct in communication with the mixing duct, the hot air device configured to: when the pulverized coal ignition device is ignited to work, hot air with the temperature 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 is conveyed to the mixing pipe; wherein the pulverized coal firing device is configured to: when the pulverized coal ignition device is ignited to work, hot air entering the mixing pipe and pulverized coal entering the mixing pipe are mixed in the mixing pipe, and the mixed hot air flows into the pre-burning pipe to be ignited by the ignition port.
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 pipeline 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 port which is arranged in the cylinder body and is used for igniting the wind-powder airflow entering the internal combustion cylinder;
the auxiliary hot air powder pipe comprises a pre-burning pipe surrounding the ignition port and a mixing pipe communicated with the pre-burning pipe;
the pulverized coal pipe is communicated with the mixing pipe and is configured to convey pulverized coal to the mixing pipe when the pulverized coal ignition device is ignited to work;
a hot air device comprising a hot air duct in communication with the mixing duct, the hot air device configured to: when the pulverized coal ignition device is ignited to work, hot air with the temperature 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 is conveyed to the mixing pipe;
wherein the pulverized coal firing device is configured to: when the pulverized coal ignition device is ignited to work, the hot air entering the mixing pipe and the pulverized coal entering the mixing pipe are mixed in the mixing pipe, and the mixed air flows into the pre-burning pipe to be ignited by the ignition port.
In some embodiments, the outlet of the pre-combustion tube is provided at an inlet of the internal combustion cylinder or at an inlet end of a chamber of the internal combustion cylinder.
In some embodiments, the flow rate of the mixture of the hot air entering the mixing pipe and the pulverized coal entering the mixing pipe after being mixed in the mixing pipe entering the pre-combustion pipe is smaller than the flow rate of the air-pulverized coal flow entering the internal combustion cylinder.
In some embodiments, the hot air device is configured to: the temperature of the hot air input into the mixing pipe by the hot air device is 200-600 ℃.
In some embodiments, the cylinder includes a curved cylinder section, the wind powder pipeline communicates with an inlet of the curved cylinder section, the coal powder pipe includes a powder collector disposed in an inner cavity of the curved cylinder section and a powder conveying pipe communicating the powder collector and the mixing pipe, the powder collector is disposed between a radially inner cylinder wall and a radially outer cylinder wall of the curved cylinder section on a side close to the radially outer cylinder wall of the curved cylinder section, and the powder collector includes an opening facing an incoming flow direction of the wind powder airflow.
In some embodiments, the dust collector comprises a divergent inlet diverging in the direction of the incoming flow of the air-dust flow.
In some embodiments, the ignition device comprises a linear ignition pipe, the ignition pipe comprises the ignition port, the auxiliary hot air powder pipe comprises a linear air powder pipe surrounding the ignition pipe, the air powder pipe comprises a hot air input pipe, the mixing pipe and the pre-combustion pipe, the mixing pipe is located between the pre-combustion pipe and the hot air input pipe, the pulverized coal pipe is connected with the mixing pipe, and the hot air pipe is connected with the hot air input pipe.
In some embodiments, the pulverized coal pipe includes a powder collector disposed outside the barrel and a powder conveying pipe communicating the powder collector and the mixing pipe, and the powder collector is communicated with the air-powder pipeline to collect pulverized coal conveyed to the powder conveying pipe from the air-powder pipeline.
In some embodiments, the ignition device includes a linear ignition tube, the ignition tube includes the ignition port, the mixing tube includes a mixing inner tube section located in the inner cavity of the cylinder and communicated with the pre-combustion tube and a mixing outer tube section located outside the cylinder, the auxiliary hot air-powder tube further includes a hot air input tube connected with the mixing outer tube section, the coal-powder tube includes a powder collector located outside the cylinder and a powder conveying tube communicated with the powder collector and the mixing outer tube section, the powder collector is communicated with the air-powder tube to collect the coal powder conveyed to the powder conveying tube from the air-powder tube, and the hot air tube is connected with the hot air input tube.
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 is output from the first hot air outlet.
Based on the pulverized coal ignition device provided by the invention, the auxiliary hot air-powder pipe, the pulverized coal pipe and the hot air device are arranged, hot air with the temperature higher than the temperature of air-powder airflow entering the internal combustion cylinder and lower than the temperature of the ignition point of the air-powder airflow is utilized to pre-combust the mixture with pulverized coal in the pre-combustion pipe, the ignition source can form combustion near the ignition source only by providing less energy, the ambient temperature near the ignition source is increased, the ignition condition of the air-powder airflow of the main part in the area near the ignition source can be improved, the main air-powder airflow conveyed to the vicinity of the internal combustion cylinder by the air-powder pipeline is easier to ignite, the ignition energy input by the ignition source is reduced, and the ignition range of coal quality suitable for ignition of the pulverized coal ignition device is improved.
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.
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 4, the pulverized coal ignition device of the present embodiment includes a cylinder 1, an internal combustion cylinder 2, an air-powder duct 3, an ignition device 4, an auxiliary hot-air-powder duct 5, a pulverized coal duct, and a hot-air device.
The internal combustion cylinder 2 is arranged in the inner cavity of the cylinder body 1. The air powder pipeline 3 is communicated with the inner cavity of the cylinder body 1, and the air powder pipeline 3 is used for conveying air powder airflow to the inner combustion cylinder 2.
The air powder pipeline 3 is communicated with the inner cavity of the cylinder body 1, and the air powder pipeline 3 is used for conveying air powder airflow to the inner combustion cylinder 2; the air-powder pipeline 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 comprises an ignition port 41 which is arranged in the cylinder body 1 and is used for igniting the wind-powder airflow entering the internal combustion cylinder 2; the ignition port 41 is an outlet of the ignition device, and the ignition port 41 is a fire outlet for generating a flame 42.
The auxiliary hot air powder duct 5 includes a pre-combustion duct 53 surrounding the ignition port 41, and a mixing duct 52 communicating with the pre-combustion duct 53. The pre-combustion pipe 53 surrounds the outside of the ignition port 41.
The pulverized coal pipe is communicated with the mixing pipe 52, and is configured to convey pulverized coal to the mixing pipe 52 when the pulverized coal ignition device is operated for ignition. The transport of the coal dust can be carried out by various means such as gravity or by air flow.
The hot air device comprises a hot air duct 7 in communication with the mixing duct 52, the hot air device being configured to: when the pulverized coal ignition device is in ignition operation, hot air with the temperature 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 is delivered to the mixing pipe 52.
Wherein the pulverized coal firing device is configured to: when the pulverized coal ignition device is in ignition operation, the hot air entering the mixing pipe 52 and the pulverized coal entering the mixing pipe 52 are mixed in the mixing pipe 52, and after mixing, the mixture flows into the pre-combustion pipe 53 to be ignited by the ignition port 41. The temperature of the arc or flame 42 output from the ignition port 41 is higher than the ignition point of the wind-powder airflow entering the pre-combustion pipe 53 for pre-combustion, so that the mixture can be ignited.
When the pulverized coal ignition device is in ignition operation, hot air delivered by the hot air device enters the mixing pipe and then is mixed with pulverized coal entering the mixing pipe 52 to form an air-powder mixture (or a pulverized coal airflow comprising air), and the pulverized coal in the mixture is heated by the hot air. The wind-powder airflow conveyed into the cylinder by the wind-powder pipeline 3 is the main wind-powder airflow, the volume of the main wind-powder airflow accounts for most, and the wind-powder airflow formed in the mixing pipe 52 is a small amount of wind-powder airflow which is greatly less than the flow of the main wind-powder airflow. The temperature of the mixture formed in the mixing tube 52 is greater than the temperature of the main body breeze flow entering the internal combustion barrel and less than its ignition point. Since the mixture formed in the mixing pipe 52 has a high temperature and a small flow rate, the mixture is easily ignited by the ignition port 41 when flowing into the pre-combustion pipe. After the mixture is ignited, the main air-powder flow reaching the vicinity of the ignition port 41 can be ignited more easily under the combined action of the mixture and the ignition device.
The pulverized coal ignition device of the embodiment is provided with the auxiliary hot air-powder pipe 5, the pulverized coal pipe and the hot air device, hot air with the temperature higher than the temperature of air-powder airflow entering the internal combustion cylinder 2 and lower than the ignition point of the air-powder airflow is used for pre-burning the mixture of the air-powder airflow and pulverized coal in the pre-burning pipe 53, an ignition source can form burning near the ignition source only by providing smaller energy, the ambient temperature near the ignition source is increased, the ignition condition of the air-powder airflow of a main part in the area near the ignition source can be improved, the main air-powder airflow conveyed by the air-powder pipeline 3 to the internal combustion cylinder 2 is easier to ignite, the ignition energy input by the ignition source is reduced, and the range of the pulverized coal ignition device suitable for ignited coal quality is improved. Meanwhile, because the hot air device of the embodiment outputs hot air with the temperature lower than the ignition point temperature of the air-powder airflow, the hot air does not heat the hot air pipes 7, the mixing pipes 52 and other pipelines for conveying the hot air to the temperature higher than the ignition point temperature of the air-powder airflow, the hot air pipes, the mixing pipes 52 and other pipelines do not ignite the air-powder airflow, and the hot air pipes, the mixing pipes 52 and other pipelines do not ignite the air-powder airflow when the ignition device is turned off, so that the air-powder airflow can only be ignited by the ignition device, the ignition of the air-powder airflow is safer and more controllable, and the system has good safety. In addition, since the air-powder airflow formed in the mixing pipe 52 for pre-burning is a small-flow air-powder airflow independent of the main air-powder airflow, the temperature and flow rate of the small-flow air-powder airflow can be controlled more conveniently and reliably.
In some embodiments, as shown in fig. 1-4, the output of the pre-combustion tube 53 is provided at the inlet of the combustion cylinder 2 or at the inlet end of the chamber of the combustion cylinder 2. As shown in fig. 1 to 3, the outlet of the precombustion pipe 53 is provided at the inlet end of the chamber of the internal combustion cylinder 2, i.e., at the upstream portion in the chamber of the internal combustion cylinder 2. In the embodiment shown in fig. 4, the outlet of the pre-combustion pipe 53 is provided at the inlet of the internal combustion cylinder 2, i.e. upstream of the internal combustion cylinder 2.
In some embodiments, the flow rate of the mixture of the hot air entering the mixing pipe 52 and the pulverized coal entering the mixing pipe 52 entering the pre-combustion pipe 53 is smaller than the flow rate of the air-pulverized coal flow entering the internal combustion cylinder 2.
In some embodiments, the hot air device is configured to: the temperature of hot air input into the mixing pipe 52 by the hot air device is 200-600 ℃.
In some embodiments, as shown in fig. 1, the cylinder 1 includes a curved cylinder section 11, the wind powder duct 3 communicates with an inlet of the curved cylinder section 11, the coal powder duct includes a powder collector 61 disposed in an inner cavity of the curved cylinder section 11 and a powder conveying duct 62 communicating the powder collector 61 and the mixing duct 52, the powder collector 61 is disposed on a side of the cylinder wall near the radial outer side of the curved cylinder section 11 between the cylinder wall at the radial inner side and the cylinder wall at the radial outer side of the curved cylinder section 11, and the powder collector 61 includes an opening facing an incoming direction of the wind powder airflow. As shown in fig. 1, the opening 611 of the powder collector is located on the side of the inner wall of the curved tube section 11 close to the radial outer side, the pulverized coal of the air-powder airflow is collected on the side of the inner wall of the curved tube section 11 on the radial outer side under the action of the air-powder airflow entering from the curved tube section 11, so as to form a rich-lean separation, the powder collector is located at the position, and the pulverized coal with higher concentration enters the powder collector from the opening 611 of the powder collector, thereby being more conducive to the combustion of the air-powder airflow entering the pre-combustion pipe 53.
In some embodiments, as shown in fig. 1, the powder collector comprises a divergent inlet diverging in the direction of the incoming flow of the air-powder flow. That is, the flow area of the inlet of the powder collector is gradually increased along the flowing direction of the air-powder airflow, which helps to reduce the interference of the powder collector on the flowing of the main air-powder airflow, and the pulverized coal entering the powder collector has smaller flow resistance when flowing into the mixing pipe 52 and more easily passes through the powder conveying pipe 62.
In some embodiments, as shown in fig. 1, the ignition device 4 comprises a linear ignition tube, the ignition tube comprises an ignition port 41, the auxiliary hot air powder tube 5 comprises a linear air powder tube surrounding the ignition tube, the air powder tube comprises a hot air input tube 51, a mixing tube 52 and a pre-combustion tube, the mixing tube 52 is located between the pre-combustion tube 53 and the hot air input tube 51, the pulverized coal tube is connected with the mixing tube 52, and the hot air tube 7 is connected with the hot air input tube 51. The hot air pipe 7 inputs hot air through a hot air input pipe 51, and the hot air then flows into the mixing pipe 52 from the hot air input pipe 51 to be mixed with the pulverized coal entering the mixing pipe 52.
In some embodiments, the pulverized coal pipe includes a powder collector 61 disposed outside the barrel 1 and a powder conveying pipe 62 communicating the powder collector 61 and the mixing pipe 52, as shown in fig. 2 to 4, the powder collector 61 communicates with the air-powder duct 3 to collect pulverized coal conveyed to the powder conveying pipe 62 from the air-powder duct 3. The powder collector 61 in this embodiment is disposed outside the cylinder 1, and collects the pulverized coal from a device outside the cylinder 1. In the embodiments shown in fig. 2 to 4, the powder collector collects the pulverized coal from the outer tube 8 of the cylinder, and in some embodiments, the air-powder duct 3 includes the outer tube 8 of the cylinder, that is, the outer tube 8 of the cylinder is a duct for conveying the main air-powder airflow into the cylinder 1. The embodiment collects and collects the pulverized coal from the main air-pulverized coal airflow, and the pre-combustion in the pre-combustion pipe can be conveniently realized. The powder collector can collect the wind-powder airflow with the same coal powder concentration as the wind-powder airflow flowing in the wind-powder pipeline 3, and can also collect the coal powder after the coal powder concentration is improved.
In some embodiments, as shown in fig. 3 and 4, the ignition device 4 comprises a linear type ignition pipe, the ignition pipe comprises an ignition port 41, the mixing pipe 52 comprises a mixing inner pipe section located in the inner cavity of the cylinder 1 and communicated with the pre-combustion pipe 53 and a mixing outer pipe section located outside the cylinder 1, the auxiliary hot air-powder pipe 5 further comprises a hot air input pipe 51 connected with the mixing outer pipe section, the coal-powder pipe comprises a powder collector 61 arranged outside the cylinder 1 and a powder conveying pipe 62 communicated with the powder collector 61 and the mixing outer pipe section, the powder collector 61 is communicated with the air-powder pipe 3 to collect coal powder conveyed to the powder conveying pipe 62 from the air-powder pipe 3, and the hot air pipe 7 is connected with the hot air input pipe 51.
In some embodiments, the ignition device 4 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 is output from the first hot air outlet.
In some embodiments, the hot air device includes a pipeline for air to enter and a heating device for heating the air to enter, the heating device may include an electric heating device, a steam heating device or a flue gas heating device, and the heating device further includes a temperature control device, and the air output from the pipeline after the temperature is controlled by the heating and temperature control device forms the hot air of the above embodiments.
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 (11)
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 pipeline (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);
the ignition device (4) comprises an ignition port (41) which is arranged in the cylinder body (1) and is used for igniting the wind-powder airflow entering the internal combustion cylinder (2);
an auxiliary hot air powder pipe (5) comprising a pre-combustion pipe (53) surrounding the ignition port (41), and a mixing pipe (52) communicating with the pre-combustion pipe (53);
a pulverized coal pipe communicated with the mixing pipe (52) and configured to convey pulverized coal to the mixing pipe (52) when the pulverized coal ignition device is in ignition operation;
a hot air device comprising a hot air duct (7) in communication with the mixing duct (52), the hot air device configured to: when the pulverized coal ignition device is ignited to work, hot air with the temperature 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 is conveyed to the mixing pipe (52);
wherein the pulverized coal firing device is configured to: when the pulverized coal ignition device is ignited to work, the hot air entering the mixing pipe (52) and the pulverized coal entering the mixing pipe (52) are mixed in the mixing pipe (52), and the mixed pulverized coal flows into the pre-burning pipe (53) to be ignited by the ignition port (41).
2. Pulverized coal ignition device according to claim 1, characterized in that the outlet of the pre-combustion pipe (53) is provided at the inlet of the internal combustion cylinder (2) or at the inlet end of the chamber of the internal combustion cylinder (2).
3. The pulverized coal ignition device according to claim 1, characterized in that the flow rate of the mixture of the hot air entering the mixing pipe (52) and the pulverized coal entering the mixing pipe (52) after mixing in the mixing pipe (52) entering the pre-combustion pipe (53) is smaller than the flow rate of the air-pulverized-air flow entering 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 input into the mixing pipe (52) by the hot air device is 200-600 ℃.
5. The pulverized coal ignition device according to claim 1, wherein the barrel (1) comprises a bent barrel section (11), the air-powder duct (3) is communicated with an inlet of the bent barrel section (11), the pulverized coal duct comprises a powder collector (61) arranged in an inner cavity of the bent barrel section (11) and a powder conveying duct (62) communicating the powder collector (61) with the mixing duct (52), the powder collector (61) is arranged on one side of the barrel wall close to the radial outer side of the bent barrel section (11) between the barrel wall of the radial inner side and the barrel wall of the radial outer side of the bent barrel section (11), and the powder collector (61) comprises an opening facing the incoming flow direction of the air-powder airflow.
6. Pulverized coal ignition device according to claim 5, characterized in that the collector (61) comprises a divergent inlet divergent in the direction of the incoming flow of the air-powder flow.
7. The pulverized coal ignition device according to claim 1, characterized in that the ignition device (4) comprises a linear ignition pipe including the ignition port (41), the auxiliary hot air powder pipe (5) comprises a linear air powder pipe surrounding the ignition pipe, the air powder pipe comprises a hot air input pipe (51), the mixing pipe (52) and the pre-combustion pipe (53), the mixing pipe (52) is located between the pre-combustion pipe (53) and the hot air input pipe (51), the pulverized coal pipe is connected with the mixing pipe (52), and the hot air pipe (7) is connected with the hot air input pipe (51).
8. The pulverized coal ignition device according to claim 7, characterized in that the pulverized coal pipe comprises a powder collector (61) disposed outside the cylinder (1) and a powder conveying pipe (62) communicating the powder collector (61) and the mixing pipe (52), and the powder collector (61) communicates with the air-powder duct (3) to collect pulverized coal conveyed to the powder conveying pipe (62) from the air-powder duct (3).
9. Pulverized coal ignition device according to claim 1, characterized in that the ignition device (4) comprises a straight squib, the ignition tube comprises the ignition port (41), the mixing tube (52) comprises a mixing inner tube section which is positioned in the inner cavity of the cylinder body (1) and communicated with the pre-burning tube (53) and a mixing outer tube section which is positioned outside the cylinder body (1), the auxiliary hot air powder pipe (5) also comprises a hot air input pipe (51) connected with the mixed outer pipe section, the coal powder pipe comprises a powder collector (61) arranged outside the cylinder body (1) and a powder conveying pipe (62) communicated with the powder collector (61) and the mixed outer pipe section, the powder collector (61) is communicated with the air powder pipeline (3) so as to collect coal powder conveyed to the powder conveying pipe (62) from the air powder pipeline (3), and the hot air pipe (7) is connected with the hot air input pipe (51).
10. Pulverized coal ignition device according to any of claims 1 to 9, characterized in that the ignition device (4) comprises a plasma generator, a fuel or gas gun.
11. The pulverized coal ignition device as claimed in any one of claims 1 to 9, characterized in that the hot air device is configured to: when the pulverized coal ignition device works, hot air is output from the first hot air outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111422211.0A CN114017795A (en) | 2021-11-26 | 2021-11-26 | Pulverized coal ignition device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111422211.0A CN114017795A (en) | 2021-11-26 | 2021-11-26 | Pulverized coal ignition device |
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| CN114017795A true CN114017795A (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111422211.0A Pending CN114017795A (en) | 2021-11-26 | 2021-11-26 | Pulverized coal ignition device |
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| CN (1) | CN114017795A (en) |
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