High-moisture low-calorific-value coal plasma efficient burner
By using a feed cylinder and baffle structure in the burner to screen coal types and controlling the opening and closing of the baffles at different temperature stages, the problem of incomplete combustion of high-moisture, low-calorific-value coal types has been solved, achieving efficient utilization of coal types and combustion stability.
Patent Information
- Application Number
- CN202511153236.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-18
- Publication Date
- 2025-10-17
AI Technical Summary
High-moisture, low-calorific-value coals are difficult to burn completely during combustion, resulting in low and unstable combustion efficiency, especially large-volume coals which are difficult to ignite quickly.
The material distribution shell employs a material distribution cylinder and baffle structure. Small coal types are screened through the material passage holes on the material distribution cylinder, and the opening and closing of the baffle are controlled at different combustion temperature stages to ensure that small coal types are ignited at low temperatures and large coal types are ignited at high temperatures. Combined with the use of spiral blades and conveying fans, the utilization rate of coal types and combustion stability are improved.
It improves the utilization efficiency and combustion stability of coal types, ensuring that small-volume coal types ignite at low temperatures and large-volume coal types ignite at high temperatures, thereby enhancing combustion efficiency and stability.
Smart Images
Figure CN120799486A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of burners, in particular to a high-moisture low-calorific-value coal plasma high-efficiency burner. BACKGROUND
[0002] At present, coal power still occupies a dominant position in China, however, in recent years, the utilization hours of thermal power generating units will decrease year by year, and it is a new normal to improve the flexibility of thermal power generating units and participate in deep peak regulation of power grids on a large scale. During this period, plasma burners need to be put into use for a long time every year to stabilize combustion.
[0003] High-moisture low-calorific-value coal generally refers to coal varieties with high moisture content and relatively low heat output per unit mass. During the combustion process of high-moisture coal, the evaporation of water will absorb part of the heat, causing the combustion temperature to decrease relatively. The lower combustion temperature can reduce the formation of unburned carbon particles in fly ash, and also inhibit the generation of nitrogen oxides at high temperatures, thereby reducing dust pollution. During the combustion process of sulfur in high-moisture coal, some sulfur will react with water to form sulfates, and these sulfates will be discharged with ash, thereby reducing the emission of sulfur dioxide.
[0004] Whether the sprayed coal can be fully combusted determines the utilization efficiency of the coal, and the size of the coal determines whether the coal can be quickly ignited, and further determines whether the coal can be fully combusted. After the coal is crushed, the particle size of the coal is still different, among which the coal with small volume and small weight is easy to be ignited and requires a lower ignition temperature, while the coal with large volume and large weight is not easy to be ignited and requires a higher ignition temperature. SUMMARY
[0005] In order to classify the coal and improve the utilization rate of the coal, the present application provides a high-moisture low-calorific-value coal plasma high-efficiency burner.
[0006] The present application provides a high-moisture low-calorific-value coal plasma high-efficiency burner, which adopts the following technical scheme:
[0007] A high-moisture low-calorific-value coal plasma high-efficiency burner, comprising a material distribution shell, a material distribution cavity and a material outlet cavity are communicated and are formed in the material distribution shell, the material distribution cavity is located above the material outlet cavity, a material distribution cylinder is rotatably connected in the material distribution cavity, a plurality of material passing holes are formed in the outer wall of the material distribution cylinder, a material inlet channel is formed in one end of the material distribution shell and is communicated with a coal source, the material inlet channel is communicated with the inside of the material distribution cylinder, a material outlet channel is formed in the end of the material distribution shell away from the material inlet channel, the material outlet channel is communicated with the material distribution cavity and the material outlet cavity respectively, a first baffle and a second baffle are arranged on the material distribution shell, and the first baffle and the second baffle are used for opening or closing the material outlet channel.
[0008] By adopting the technical scheme, the coal is added into the distributing cylinder through the feeding channel, then the distributing cylinder is rotated, the coal in the distributing cylinder is screened through the material passing hole on the distributing cylinder, the coal with small volume falls into the discharging cavity through the material passing hole, the coal with large volume continues to move through the rotation of the distributing cylinder, when the temperature in the burner is low and the burner is in the initial combustion stage, the second baffle is opened, the coal in the discharging cavity is discharged and ignited; as the temperature in the burner increases, the first baffle is opened, the coal in the distributing cylinder is discharged, the coal with large volume is quickly ignited, the utilization efficiency of the coal is improved, and the stability of the combustion is improved.
[0009] Optionally, a driving gear ring coaxially arranged on the outer wall of the distributing cylinder is driven to rotate by a transmission assembly arranged on the distributing shell.
[0010] By adopting the technical scheme, the driving gear is rotated, and the distributing cylinder is conveniently driven to rotate through the driving gear ring, so that the coal in the distributing cylinder is stirred, and the coal with small volume falls into the discharging cavity through the material passing hole on the distributing cylinder.
[0011] Optionally, the transmission assembly comprises a driving motor, an output shaft of the driving motor is fixedly connected with a driving gear in a coaxial mode, the driving gear is engaged with the driving gear ring, and the driving motor is arranged on the distributing cylinder.
[0012] By adopting the technical scheme, the driving motor is started, the driving motor drives the driving gear to rotate, and the distributing cylinder is driven to rotate through the engagement between the driving gear and the driving gear ring.
[0013] Optionally, a spiral blade is fixedly arranged on the inner wall of the distributing cylinder.
[0014] By adopting the technical scheme, the coal in the distributing cylinder is stirred through the spiral blade; meanwhile, the coal is conveyed from the feeding channel to the discharging channel through the inclined inner wall during the rotation of the distributing cylinder.
[0015] Optionally, a conveying fan is connected to one end of the discharging cavity away from the discharging channel.
[0016] By adopting the technical scheme, the conveying fan can blow the coal in the discharging cavity out of the discharging channel.
[0017] Optionally, the first baffle is matched with the distributing cavity, the second baffle is matched with the discharging cavity, four connecting plates are arranged on the distributing shell, the top of the first baffle is rotationally connected with two of the connecting plates through a first connecting shaft, and the top of the second baffle is rotationally connected with the other two connecting plates through a second connecting shaft; the first connecting shaft is parallel to the second connecting shaft.
[0018] By adopting the technical scheme, the opening and closing of the first baffle are controlled by rotating the first connecting shaft, and the opening and closing of the second baffle are controlled by rotating the second connecting shaft.
[0019] Optionally, a first connecting gear is coaxially and fixedly connected to the first connecting shaft, and a second connecting gear is coaxially and fixedly connected to the second connecting shaft, and the first connecting gear is engaged with the second connecting gear.
[0020] By adopting the technical scheme, the first connecting shaft is rotated, and under the engagement of the first connecting gear and the second connecting gear, the second connecting shaft is rotated in the opposite direction of the first connecting shaft, so that the first baffle and the second baffle are in an open-close state.
[0021] Optionally, a working motor is arranged at an end of the first connecting shaft away from the first connecting gear, an output shaft of the working motor is coaxially and fixedly connected to the first connecting shaft, and the working motor is arranged on the corresponding connecting plate.
[0022] Optionally, a material passing channel is arranged in communication between the material distributing cavity and the material discharging cavity, and the material distributing shell is provided with a blocking plate matched with the material passing channel.
[0023] By adopting the technical scheme, the material passing channel is blocked by the blocking plate, and when it is needed to pour the coal in the material distributing cavity into the material discharging cavity, the blocking plate is removed from the material passing channel, so that the coal in the material distributing cavity falls into the material discharging cavity.
[0024] Optionally, a working cylinder is arranged on the material distributing shell, and a piston rod end of the working cylinder is connected to the blocking plate.
[0025] By adopting the technical scheme, the working cylinder is started, the position of the blocking plate is adjusted, and the on-off of the material passing channel is controlled.
[0026] In summary, the present application has at least one of the following beneficial technical effects:
[0027] 1. The coal is added into the material distributing cylinder through the feeding channel, the material distributing cylinder is rotated, and the coal in the material distributing cylinder is transported from the feeding channel to the discharging channel; in the transportation process, the coal passes through the material passing hole on the material distributing cylinder, the coal with small volume falls into the material discharging cavity through the material passing hole, and the coal with large volume continues to move by the rotation of the material distributing cylinder. When the temperature in the burner is low and in the initial combustion stage, the second baffle is opened, and the coal in the material discharging cavity is sent out to be ignited; as the temperature in the burner increases, the first baffle is opened, and the coal in the material distributing cylinder is sent out, so that the coal with large volume is quickly ignited, the utilization efficiency of the coal is improved, and the stability of the combustion is improved.
[0028] 2, the spiral blade is used for stirring the coal in the distribution cylinder; meanwhile, the spiral blade is used for conveying the coal from the feeding channel to the discharging channel through the inclined inner wall during the rotation of the distribution cylinder. BRIEF DESCRIPTION OF DRAWINGS
[0029] Fig. 1 It is a whole structure schematic view of a high-moisture low-calorific-value coal plasma high-efficiency burner.
[0030] Fig. 2 It is a schematic view of the internal structure of the distribution shell in the embodiment of the application.
[0031] Fig. 3 It is a schematic view of the connection relationship between the driving gear and the driving gear ring in the embodiment of the application.
[0032] Mark explanation: 1, distribution shell; 11, distribution cavity; 12, discharging cavity; 13, material passing channel; 14, feeding channel; 15, discharging channel; 16, connecting plate; 2, distribution cylinder; 21, material passing hole; 22, driving gear ring; 23, driving motor; 24, driving gear; 25, spiral blade; 3, conveying fan; 4, first baffle; 41, first connecting shaft; 42, first connecting gear; 5, second baffle; 51, second connecting shaft; 52, second connecting gear; 6, working motor; 7, working cylinder; 71, blocking plate. DETAILED DESCRIPTION
[0033] The application will be further described in detail in combination with all the drawings.
[0034] The embodiment of the application discloses a high-moisture low-calorific-value coal plasma high-efficiency burner.
[0035] Reference Figs. 1-3 A high-moisture low-calorific-value coal plasma high-efficiency burner, comprising a distribution shell 1, the distribution shell 1 is provided with a distribution cavity 11 and a discharging cavity 12 which are connected in communication, the distribution cavity 11 is located above the discharging cavity 12, a distribution cylinder 2 is rotationally connected in the distribution cavity 11, a plurality of material passing holes 21 are formed in the outer wall of the distribution cylinder 2, a feeding channel 14 which is connected with a coal source is formed in one end of the distribution shell 1, the feeding channel 14 is in communication with the distribution cylinder 2, a discharging channel 15 is formed in the end of the distribution shell 1 which is far away from the feeding channel 14, and the discharging channel 15 is in communication with the distribution cavity 11 and the discharging cavity 12 respectively.
[0036] The outer wall of the distributing barrel 2 is provided with a driving gear ring 22 rotating by a transmission assembly, the transmission assembly comprising a driving motor 23, the output shaft of the driving motor 23 being coaxially fixedly connected with a driving gear 24, the driving gear 24 being engaged with the driving gear ring 22, and the driving motor 23 being arranged on the distributing shell 1. In use, the coal is poured into the distributing barrel 2 through the feeding channel 14, the driving motor 23 is started, the driving motor 23 works, the distributing barrel 2 is driven to rotate by the driving gear 24 and the driving gear ring 22, so that the coal in the distributing barrel 2 is stirred, the coal with small volume falls into the discharging cavity 12 through the material hole 21 on the distributing barrel 2, and the coal with large volume remains in the distributing barrel 2.
[0037] The inner wall of the distributing barrel 2 is fixedly provided with a spiral blade 25. The coal in the distributing barrel 2 is stirred by the spiral blade 25, so that the coal with small volume falls into the discharging cavity 12; meanwhile, the spiral blade 25 conveys the coal from the feeding channel 14 to the discharging channel 15 through the inclined inner wall during the rotation of the distributing barrel 2.
[0038] The discharging cavity 12 is connected with a conveying fan 3 at the end far from the discharging channel 15. The coal with small volume in the discharging cavity 12 is blown out of the discharging channel 15 by the conveying fan 3 and used for ignition.
[0039] The distributing shell 1 is provided with a first baffle 4 and a second baffle 5, the first baffle 4 and the second baffle 5 being used for guiding or cutting off the discharging channel 15, the first baffle 4 being matched with the distributing cavity 11, the second baffle 5 being matched with the discharging cavity 12, the distributing shell 1 being provided with four connecting plates 16, the top of the first baffle 4 being rotatably connected with two of the connecting plates 16 through a first connecting shaft 41, the top of the second baffle 5 being rotatably connected with the other two connecting plates 16 through a second connecting shaft 51, the first connecting shaft 41 and the second connecting shaft 51 being parallel to each other, the first connecting shaft 41 being coaxially fixedly connected with a first connecting gear 42, the second connecting shaft 51 being coaxially fixedly connected with a second connecting gear 52, the first connecting gear 42 being engaged with the second connecting gear 52. The first connecting shaft 41 is provided with a working motor 6 at the end far from the first connecting gear 42, the working motor 6 being arranged on the corresponding connecting plate 16, and the output shaft of the working motor 6 being coaxially fixedly connected with the first connecting shaft 41.
[0040] The first connecting shaft 41 is driven to rotate by the working motor 6, the first connecting shaft 41 is rotated, the first connecting gear 42 and the second connecting gear 52 are engaged, the second connecting shaft 51 is driven to rotate in the direction opposite to the rotation direction of the first connecting shaft 41, and the first baffle 4 and the second baffle 5 are in the state of one being opened and the other being closed.
[0041] The material distribution cavity 11 and the material outlet cavity 12 are communicated through the material passing channel 13, the material distribution shell 1 is provided with a blocking plate 71 matched with the material passing channel 13, the material distribution shell 1 is provided with a working cylinder 7, and the piston rod end of the working cylinder 7 is connected with the blocking plate 71. The working cylinder 7 is started to adjust the position of the blocking plate 71 so as to control the on-off of the material passing channel 13.
[0042] The implementation principle of the present application is that the coal is added into the material distribution cylinder 2 through the feeding channel 14, then the material distribution cylinder 2 is rotated, the coal in the material distribution cylinder 2 is screened through the material passing holes 21 on the material distribution cylinder 2, the coal with small volume falls into the material outlet cavity 12 through the material passing holes 21, and the coal with large volume continues to rotate through the material distribution cylinder 2. When the temperature in the burner is low and is in the initial combustion stage, the working motor 6 is started, the first blocking plate 4 is closed, the second blocking plate 5 is opened, and the conveying fan 3 is started to send the coal in the material outlet cavity 12 out to ignite; with the increase of the temperature in the burner, the working motor 6 is started to open the first blocking plate 4 and close the second blocking plate 5, and the coal in the material distribution cylinder 2 is sent out to ignite the coal with large volume, so that the utilization efficiency of the coal is improved and the stability of the combustion is improved.
[0043] The above are the preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.
Claims
1. A high-efficiency plasma burner for high-moisture and low-calorific value coal, characterized in that: The invention comprises a material distribution shell (1), wherein a material distribution cavity (11) and a material discharge cavity (12) are provided in the material distribution shell (1), wherein the material distribution cavity (11) is located above the material discharge cavity (12), wherein a material distribution cylinder (2) is rotatably connected in the material distribution cavity (11), wherein the outer wall of the material distribution cylinder (2) is provided with a plurality of material passing holes (21), wherein one end of the material distribution shell (1) is provided with a material feeding channel (14) connected with a coal source, wherein the material feeding channel (14 ... The channel (14) is communicated with the interior of the distribution barrel (2); the distribution housing (1) is provided with a discharge channel (15) at one end away from the feed channel (14); the discharge channel (15) is communicated with the distribution cavity (11) and the discharge cavity (12) respectively; the distribution housing (1) is provided with a first baffle (4) and a second baffle (5); the first baffle (4) and the second baffle (5) are used to open or close the discharge channel (15).
2. The high-efficiency plasma burner for high-moisture and low-calorific value coal according to claim 1, characterized in that: A driving gear ring (22) is coaxially arranged on the outer wall of the material distribution barrel (2) and is driven to rotate by a transmission assembly, and the transmission assembly is arranged on the material distribution housing (1).
3. The high-efficiency plasma burner for high-moisture and low-calorific value coal according to claim 2, characterized in that: The transmission assembly comprises a driving motor (23), the output shaft of the driving motor (23) is coaxially fixedly connected with a driving gear (24), the driving gear (24) is meshed with a driving gear ring (22), and the driving motor (23) is arranged on the distributing barrel (2).
4. The high-efficiency plasma burner for high-moisture and low-calorific value coal according to claim 1, characterized in that: The inner wall of the material distributing barrel (2) is fixedly provided with a spiral blade (25).
5. The high-efficiency plasma burner for high-moisture and low-calorific value coal according to claim 1, characterized in that: The discharge cavity (12) is connected to a conveying fan (3) at one end away from the discharge channel (15).
6. The high-efficiency plasma burner for high-moisture and low-calorific value coal according to claim 1, characterized in that: The first baffle (4) cooperates with the material distribution cavity (11), and the second baffle (5) cooperates with the material discharge cavity (12). Four connecting plates (16) are provided on the material distribution shell (1). The top of the first baffle (4) is rotatably connected to two of the connecting plates (16) through a first connecting shaft (41), and the two sides of the top of the second baffle (5) are rotatably connected to the other two connecting plates (16) through a second connecting shaft (51); the first connecting shaft (41) and the second connecting shaft (51) are parallel to each other.
7. The high-efficiency plasma burner for high-moisture, low-calorific value coal according to claim 6, characterized in that: A first connecting gear (42) is coaxially fixedly connected to the first connecting shaft (41), and a second connecting gear (52) is coaxially fixedly connected to the second connecting shaft (51), and the first connecting gear (42) and the second connecting gear (52) are meshed.
8. The high-efficiency plasma burner for high-moisture, low-calorific value coal according to claim 7, characterized in that: A working motor (6) is provided at one end of the first connecting shaft (41) away from the first connecting gear (42); an output shaft of the working motor (6) is coaxially fixedly connected to the first connecting shaft (41); and the working motor (6) is provided on a corresponding connecting plate (16).
9. The high-efficiency plasma burner for high-moisture and low-calorific value coal according to claim 1, characterized in that: A material transfer passage (13) is provided between the material distribution cavity (11) and the material discharge cavity (12), and the material distribution housing (1) is provided with a blocking plate (71) that matches the material transfer passage (13).
10. The high-efficiency plasma burner for high-moisture and low-calorific value coal according to claim 9, characterized in that: A working cylinder (7) is provided on the material distribution housing (1), and the end of the piston rod of the working cylinder (7) is connected to a blocking plate (71).