Pulverized coal distribution device and pulverized coal conveying device

Abstract

The invention provides a pulverized coal distribution device and a pulverized coal conveying device. The pulverized coal distribution device provided by the embodiment of the invention comprises a shell, the shell is provided with a distribution cavity, a pulverized coal inlet and a plurality of pulverized coal outlets, and the pulverized coal inlet and the plurality of pulverized coal outlets are communicated with the distribution cavity; each adjusting part comprises an adjusting baffle and a driving part, the adjusting baffles are movably arranged in the distribution cavity, the distribution cavity is divided into a coal inlet cavity and a plurality of coal outlet cavities by the adjusting baffles of the adjusting parts, the coal powder inlet is communicated with the coal inlet cavity, and the coal powder outlet is communicated with the coal outlet cavity. The multiple coal outlet cavities communicate with the multiple pulverized coal outlets in a one-to-one correspondence mode, and the driving part can drive the adjusting baffle to move so as to adjust the opening degree of an inlet of the corresponding coal outlet cavity. Therefore, according to the pulverized coal distribution device, the pulverized coal can be conveniently and uniformly distributed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas-solid two-phase flow conveying, in particular to a pulverized coal distribution device and a pulverized coal conveying device. BACKGROUND

[0002] In the related art, the double-in double-out steel ball coal mill is a new type of coal pulverizing equipment developed from the single-in single-out steel ball coal mill, and is a superior low-speed mill of the direct-fired type in the coal pulverizing equipment of the boiler of the thermal power plant. As a typical feature of the direct-fired type coal pulverizing system, the pulverized coal milled is separated by the separator above the outlet, and the primary air and the pulverized coal are supplied to the burner in real time through the coal pipe. The double-in double-out steel ball coal mill has poor uniformity of the air and the pulverized coal distribution, which restricts the flexibility of the boiler. SUMMARY

[0003] The present application aims to at least partially solve one of the technical problems in the related art. To this end, the embodiments of the present application propose a pulverized coal distribution device and a pulverized coal conveying device.

[0004] The pulverized coal distribution device of the embodiments of the present application comprises: a housing having a distribution cavity and a pulverized coal inlet and a plurality of pulverized coal outlets in communication with the distribution cavity; a plurality of adjusting members, each of which comprises an adjusting baffle and a driving part, the adjusting baffle is movably arranged in the distribution cavity, the adjusting baffles of the plurality of adjusting members divide the distribution cavity into a coal inlet cavity and a plurality of coal outlet cavities, the coal inlet is in communication with the coal inlet cavity, and the plurality of coal outlet cavities are in one-to-one correspondence with the plurality of pulverized coal outlets, and the driving part can drive the adjusting baffle to move so as to adjust the opening degree of the inlet of the corresponding coal outlet cavity.

[0005] Therefore, the pulverized coal distribution device according to the embodiments of the present application facilitates the uniform distribution of the pulverized coal.

[0006] In some embodiments, each of the adjusting members comprises two rotating shafts, two adjusting baffles and the driving part, the rotating shafts are located in the distribution cavity, the two adjusting baffles are arranged on the two rotating shafts respectively, the driving part is connected with the rotating shafts so as to drive the rotating shafts to rotate, and the two adjusting baffles of each of the adjusting members rotate in the direction adjacent to each other so as to reduce the opening degree of the inlet of the coal outlet cavity, and the two adjusting baffles of each of the adjusting members rotate in the direction away from each other so as to increase the opening degree of the inlet of the coal outlet cavity.

[0007] In some embodiments, the pulverized coal inlet and the pulverized coal outlet are arranged on the two sides of the housing in the first direction; the diameter of the distribution cavity increases in the direction away from the pulverized coal inlet in the first direction; The rotation shafts are adjacent to the coal powder outlets in the first direction; In a cross section perpendicular to the first direction, the projection of the rotation shafts is outside the projection of the coal powder outlets, the two rotation shafts form an angle, and the distance between the two rotation shafts decreases along a position adjacent to the central axis of the distribution cavity.

[0008] In some embodiments, the shell comprises a first plate body and a side ring plate, the thickness direction of the first plate body is the first direction, a plurality of coal powder outlets are opened on the first plate body, the outer peripheral contour of the first plate body is circular, the side ring plate has a first opening and a second opening on both sides of the first direction respectively, and the outer edge of the first plate body is connected with the edge of the first opening defined by the side ring plate, and the second opening defines the coal powder inlet; The inner wall surface of the side ring plate is a curved surface, and the adjusting baffle is a sector plate body matched with the inner wall surface of the side ring plate.

[0009] In some embodiments, the distribution cavity is a substantially hemispherical cavity, the inner wall surface of the side ring plate is a spherical surface, each adjusting baffle comprises a first straight edge, a second straight edge and a third arc-shaped edge, the distance between the third arc-shaped edge and the inner wall surface of the side ring plate is less than or equal to a first preset value, the first straight edge is connected with the corresponding rotation shaft, and the second straight edges of the two adjusting baffles of each adjusting member rotate in directions adjacent to each other to reduce the opening degree of the inlet of the coal outlet cavity, and the two adjusting baffles of each adjusting member rotate in directions away from each other to increase the opening degree of the inlet of the coal outlet cavity.

[0010] In some embodiments, each adjusting member comprises two driving portions, each driving portion comprises a driving handle and a scale disc, and the driving handle and the scale disc are both located outside the shell; Each scale disc is marked with a scale line to display the rotation angle of the driving handle.

[0011] In some embodiments, each scale disc has a first circular arc groove extending along a first circular arc line, the center of the first circular arc line is located on the central axis of the rotation shaft connected with the driving handle, the driving handle is provided with a fastening hole, and the driving handle and the scale disc are connected through a fastening member penetrating through the first circular arc groove and the fastening hole; One of the two rotation shafts of each adjusting member extends in a second direction, and the other extends in a third direction, and any two of the first direction, the second direction and the third direction are perpendicular to each other.

[0012] In some embodiments, the coal powder outlets are four; The middle position of the first plate body is provided with a first mounting shell, the first mounting shell comprises a plurality of side plates and a bottom plate, the plurality of side plates are sequentially connected in the circumferential direction, two sides of the plurality of side plates in the first direction are connected with the bottom plate and the first plate body respectively, the plurality of side plates and the bottom plate define a first mounting slot with an opening facing the outer side, and the side plate is provided with a first sealing part, and a part of the first sealing part extends into the distribution cavity and is connected with the first end part of the corresponding rotating shaft. The outer circumferential side of the shell is provided with a plurality of second mounting plates arranged at intervals in the circumferential direction, the second mounting plates are provided with a second sealing part located on the outer side of the shell, and a part of the driving handle extends into the second sealing part and is connected with the corresponding rotating shaft. The outer side of the shell is provided with a circular ring plate connected with the pulverized coal inlet and the pulverized coal outlet.

[0013] In some embodiments, the shell comprises a ceramic layer located on the inner side and a protective layer located on the outer side.

[0014] The application further provides a pulverized coal conveying device, which comprises A coarse separator; A plurality of primary air pipes; A pulverized coal distribution device, which is the pulverized coal distribution device described above, the outlet of the coarse separator is in communication with the pulverized coal inlet of the pulverized coal distribution device, and the plurality of primary air pipes are connected with the plurality of pulverized coal outlets respectively. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic view of a pulverized coal distribution device according to an embodiment of the application.

[0016] Figure 2 FIG. 2 is a bottom view of the pulverized coal distribution device according to the embodiment of the application.

[0017] Figure 3 FIG. 3 is a front view of the pulverized coal distribution device according to the embodiment of the application.

[0018] Figure 4 FIG. 4 is a top view of the pulverized coal distribution device according to the embodiment of the application.

[0019] Figure 5 FIG. 5 is a sectional view of the pulverized coal distribution device according to the embodiment of the application.

[0020] Figure 6 FIG. 6 is a schematic view of a shell and an adjusting part according to the embodiment of the application.

[0021] Figure 7 FIG. 7 is a sectional view of the shell and the adjusting part according to the embodiment of the application.

[0022] Figure 8 This is a schematic diagram of an adjusting member according to an embodiment of the present invention.

[0023] Figure label: 1. Shell; 11. Distribution chamber; 12. Pulverized coal inlet; 13. Pulverized coal outlet; 14. First plate; 15. Side ring plate. 2. Adjust the baffle: 21. First straight edge; 22. Second straight edge; 23. Third curved edge; 3. Shaft; 4. Drive handle; 41. Dial; 42. First arc groove; 43. Fastener; 5. First mounting housing; 51. Side plate; 52. Base plate; 53. First sealing part; 6. Second mounting plate; 61. Second sealing part. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] The pulverized coal distribution device according to an embodiment of the present invention will now be described with reference to the accompanying drawings. Figures 1 to 8 As shown, the pulverized coal distribution device according to an embodiment of the present invention includes a housing 1 and a plurality of adjusting components.

[0026] The housing 1 has a distribution chamber 11 and a pulverized coal inlet 12 communicating with the distribution chamber 11 and a plurality of pulverized coal outlets 13. For example, the housing 1 has two, three, four, five, six, seven or eight pulverized coal outlets 13. The plurality of pulverized coal outlets 13 are arranged at circumferential intervals.

[0027] Each regulating component includes an adjusting baffle 2 and a driving unit. The adjusting baffle 2 is movably disposed within the distribution chamber 11. The adjusting baffles 2 of the multiple regulating components divide the distribution chamber 11 into a coal inlet chamber and multiple coal outlet chambers. The pulverized coal inlet 12 is connected to the coal inlet chamber, and the multiple coal outlet chambers are connected one-to-one with multiple pulverized coal outlets 13. The driving unit can drive the adjusting baffle 2 to move in order to adjust the opening degree of the inlet of the corresponding coal outlet chamber. Specifically, each regulating component includes multiple adjusting baffles 2. The multiple adjusting baffles 2 of each regulating component and the inner wall surface of the housing 1 define a coal outlet chamber that is connected to a pulverized coal outlet 13. The multiple regulating components divide the distribution chamber 11 into a coal inlet chamber and multiple coal outlet chambers. Pulverized coal can pass through the pulverized coal inlet 12, the coal inlet chamber, and the multiple coal outlet chambers in sequence, and then be discharged from the pulverized coal outlet 13 of each coal outlet chamber. Multiple adjusting baffles 2 of each adjusting component can limit the inlet of the coal outlet chamber (one outlet of the coal inlet chamber). By adjusting the position of the corresponding adjusting baffle 2, the opening degree of the inlet of the coal outlet chamber can be adjusted, thereby controlling the coal output of each pulverized coal outlet 13.

[0028] Therefore, the pulverized coal distribution device according to embodiments of the present invention facilitates the adjustment of the coal output at each pulverized coal outlet.

[0029] like Figure 3 and Figure 5 As shown, in some embodiments, the pulverized coal inlet 12 and the pulverized coal outlet 13 are located on both sides of the housing 1 in a first direction. The first direction can be vertical; for example, the pulverized coal inlet 12 is located on the lower side of the housing 1, and the pulverized coal outlet 13 is located on the upper side of the housing 1.

[0030] In some embodiments, the diameter of the distribution cavity 11 increases in a first direction away from the pulverized coal inlet 12 so that the pulverized coal diffuses within the distribution cavity 11 as it moves in the first direction toward the adjacent pulverized coal outlet 13, thereby facilitating discharge of the housing 1 from the plurality of pulverized coal outlets 13. For example, the diameter of the distribution cavity 11 increases upward.

[0031] like Figures 1 to 8 As shown, in some embodiments, the housing 1 includes a first plate 14 and a side ring plate 15. The thickness direction of the first plate 14 is a first direction. A plurality of pulverized coal outlets 13 are formed on the first plate 14. The outer periphery of the first plate 14 is circular. The side ring plate 15 has a first opening and a second opening on both sides of the first direction, respectively. The outer edge of the first plate 14 is connected to the edge of the side ring plate 15 that defines the first opening, and the second opening defines the pulverized coal inlet 12. For example, the thickness direction of the first plate 14 is vertical. The outer edge of the first plate 14 is connected to the edge of the side ring plate 15 that defines the first opening (upper opening) (upper edge), and the second opening (lower opening) defines the pulverized coal inlet 12.

[0032] In some embodiments, the inner wall surface of the side ring plate 15 is curved, and the adjusting baffle 2 is a fan-shaped plate that mates with the inner wall surface of the side ring plate 15. Thus, when the adjusting baffle 2 rotates, the arc-shaped edge of the adjusting baffle 2 can easily mate with the inner wall surface of the side ring plate 15, thereby making the gap between the arc-shaped edge of the adjusting baffle 2 and the inner wall surface of the side ring plate 15 smaller.

[0033] like Figures 1 to 8 As shown, in some embodiments, each regulating component includes two rotating shafts 3, two adjusting baffles 2, and a drive unit. The rotating shafts 3 are located within the distribution chamber 11. The two adjusting baffles 2 are respectively disposed on the two rotating shafts 3, and the drive unit is connected to the rotating shafts 3 to drive the rotating shafts 3 to rotate. The two adjusting baffles 2 of each regulating component rotate in a mutually adjacent direction to reduce the opening (flow area) of the inlet of the coal outlet chamber, and the two adjusting baffles 2 of each regulating component rotate in a mutually distant direction to increase the opening (flow area) of the inlet of the coal outlet chamber. Thus, by rotating the two rotating shafts 3, the inlet of the coal outlet chamber can be adjusted, thereby adjusting the coal output of the corresponding pulverized coal outlet 13.

[0034] like Figures 1 to 8 As shown, in some embodiments, the rotating shaft 3 is adjacent to the pulverized coal outlet 13 in a first direction, specifically, the rotating shaft 3 is the first plate 14 in the first direction.

[0035] In a cross-section perpendicular to the first direction, the projection of the rotating shaft 3 is located outside the projection of the pulverized coal outlet 13. The two rotating shafts 3 form an angle, and the distance between the two rotating shafts 3 decreases along the central axis of the adjacent distribution chamber 11. Specifically, in a cross-section perpendicular to the first direction, the first ends of the two rotating shafts 3 are located at the center of the distribution chamber 11 and are adjacent to each other. The second ends of the two rotating shafts 3 are located at the edge of the distribution chamber 11, and the distance between the two rotating shafts 3 is smaller along the center of the adjacent distribution chamber 11. Furthermore, the two rotating shafts 3 are located outside the pulverized coal outlet 13, thus not affecting the discharge of pulverized coal from the pulverized coal outlet 13.

[0036] like Figures 5 to 8 As shown, in some embodiments, the dispensing cavity 11 is generally a hemispherical cavity, and the inner wall surface of the side ring plate 15 is spherical.

[0037] Each adjusting baffle 2 includes a first straight edge 21, a second straight edge 22, and a third arcuate edge 23. The distance between the third arcuate edge 23 and the inner wall surface of the side ring plate 15 is less than or equal to a first preset value. The first straight edge 21 is connected to a corresponding rotating shaft 3. The second straight edges 22 of the two adjusting baffles 2 of each adjusting member rotate in a mutually adjacent direction to reduce the opening of the coal outlet chamber inlet, and the two adjusting baffles 2 of each adjusting member rotate in a mutually distant direction to increase the opening of the coal outlet chamber inlet. Specifically, the adjusting baffle 2 rotates about the central axis of the rotating shaft 3 connected to it, the third arcuate edge 23 is adjacent to the inner wall surface of the side ring plate 15, the two adjusting baffles 2 and the inner wall surface of the side ring plate 15 define the coal outlet chamber, and the two second straight edges 22 of the two adjusting baffles 2 and the inner wall surface of the side ring plate 15 define the inlet of the coal outlet chamber. By adjusting the distance between the two second straight edges 22 of the two adjusting baffles 2, the opening of the coal outlet chamber can be adjusted, thereby adjusting the coal output of the corresponding pulverized coal outlet 13.

[0038] like Figures 1 to 8 As shown, each adjusting component includes two driving parts, each including a driving handle 4 and a dial 41, both located on the outside of the housing 1. The rotation axis of each driving handle 4 is consistent with the extension direction of the shaft 3 connected to it. The driving handle 4 can move on the dial 41, and each dial 41 is marked with scale lines to show the rotation angle of the driving handle 4, thereby facilitating the operator to determine the rotation angle of the shaft 3 (adjusting baffle 2), and thus determine the opening of the coal chamber inlet, thereby adjusting the coal output of the corresponding pulverized coal outlet 13.

[0039] like Figures 1 to 8As shown, in some embodiments, each dial 41 has a first arcuate groove 42 extending along a first arc. The center of the first arc is located on the central axis of the rotating shaft 3 connected to the drive handle 4. The drive handle 4 has a fastening hole. The drive handle 4 and the dial 41 are connected by a fastener 43 passing through the first arcuate groove 42 and the fastening hole. Specifically, the fastener 43 is a stud, passing through the first arcuate groove 42 and connected to the fastening hole and nut, so that the fastener 43 can slide within the first arcuate groove 42. When it is necessary to fix the drive handle 4, the fastener 43 can be tightened so that the stud and nut angle the dial 41 and the drive handle 4, thereby fixing the drive handle 4 and fixing the position of the corresponding rotating shaft 3 (connected to the drive handle 4) and the adjusting baffle 2. In some embodiments, one of the two rotating shafts 3 of each adjusting member extends in a second direction and the other extends in a third direction, wherein any two of the first, second, and third directions are perpendicular to each other. For example, one of the two rotating shafts 3 of each adjusting member extends in a left-right direction and the other extends in a front-back direction.

[0040] In some embodiments, there are four pulverized coal outlets 13 and four regulating elements.

[0041] like Figures 1 to 8 As shown, in some embodiments, a first mounting housing 5 is provided at the middle position of the first plate 14. The first mounting housing 5 includes multiple side plates 51 and a bottom plate 52. The multiple side plates 51 are connected sequentially in the circumferential direction. The two sides of the multiple side plates 51 in the first direction are respectively connected to the bottom plate 52 and the first plate 14. The multiple side plates 51 and the bottom plate 52 define a first mounting groove with an opening facing outward. A first sealing part 53 is provided on the side plate 51. A portion of the first sealing part 53 extends into the distribution cavity 11 and is connected to the first end of the corresponding rotating shaft 3. This prevents the coal powder in the distribution cavity 11 from leaking out from the mounting hole at the side plate 51. For example, the first mounting housing 5 is a rectangular housing, the first mounting groove is a rectangular groove, and each side plate 51 is provided with two first sealing parts 53. The rotating shafts 3 connected to the two first sealing parts 53 on each side plate 51 are arranged in parallel. As another example, the first sealing part 53 is a sealing cap.

[0042] The outer periphery of the housing 1 is provided with a plurality of second mounting plates 6 spaced apart along the circumference. The second mounting plates 6 are provided with a second sealing part 61 located on the outer side of the housing 1. A part of the drive handle 4 extends into the second sealing part 61 and is connected to the corresponding rotating shaft 3. Thus, the coal powder in the distribution chamber 11 can be prevented from leaking from the mounting hole on the outer periphery of the housing 1 (side ring plate 15).

[0043] like Figures 1 to 8As shown, in some embodiments, the outer side of the housing 1 is provided with an annular plate connected to the pulverized coal inlet 12 and the pulverized coal outlet 13.

[0044] In some embodiments, the housing 1 includes an inner ceramic layer and an outer protective layer. The inner wall surface of the ceramic layer on the inner side of the housing 1 defines the wall surface of the dispensing cavity 11, thereby making the inner surface of the housing 1 smooth and wear-resistant.

[0045] This invention also proposes a pulverized coal conveying device. According to an embodiment of the invention, the pulverized coal conveying device includes a coarse separator, multiple primary air ducts, and a pulverized coal distribution device. The pulverized coal distribution device is as described in this embodiment. The outlet of the coarse separator is connected to the pulverized coal inlet 12 of the pulverized coal distribution device, and the multiple primary air ducts are respectively connected to multiple pulverized coal outlets 13. Specifically, the coarse separator is a coarse powder separator of a double-inlet, double-outlet ball mill. Due to the rotational separation effect of the coarse powder separator, the pulverized coal airflow possesses a certain rotational momentum when entering the pulverized coal distribution device according to this embodiment. The distribution cavity 11 of the pulverized coal distribution device in this embodiment is generally a hemispherical cavity. Furthermore, the inner surface of the shell 1 has a smooth, wear-resistant ceramic layer, thus effectively maintaining the rotational momentum of the pulverized coal airflow. The adjusting baffle 2 has a fan-shaped structure, ensuring that its edges perfectly fit the wall of the distribution cavity 11 without interference or collision during rotation around the rotating shaft 3.

[0046] The gaseous and solid phase coal powder flows in the coal powder gas flow exhibit significant differences in flow inertia. The opening degrees of the two regulating baffles 2 of different regulating components have a more significant correlation with the guiding effect on the solid phase coal powder flow, while the correlation with the guiding effect on the gas phase flow is relatively weak. The shell 1 has multiple coal powder outlets 13, which are connected to each primary air-coal powder pipe. The distribution of the gas phase flow among the outlets can be adjusted through the adjustable constriction orifice on the primary air-coal powder pipe. By changing the opening degrees of the two regulating baffles 2 of each regulating component, and utilizing the guiding difference of the two phase coal powder gas flow by the fan-shaped regulating baffles 2, the distribution of coal powder at each coal powder outlet 13 can be adjusted. Finally, through fine adjustment, uniform air-coal powder distribution at each coal powder outlet 13 can be achieved simultaneously. The coal powder distribution device according to the embodiment of the present invention is small in size and compact in structure, and is particularly suitable for installation at the coarse powder separator outlet of a double-inlet double-outlet ball mill, enabling uniform coal powder distribution to be achieved in a direct-fired pulverizing system of a double-inlet double-outlet ball mill.

[0047] Therefore, the pulverized coal distribution device according to embodiments of the present invention facilitates the uniform distribution of pulverized coal.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pulverized coal distribution device, characterized in that, include: A housing having a distribution cavity and a coal powder inlet and a plurality of coal powder outlets communicating with the distribution cavity; Multiple adjusting components, each including an adjusting baffle and a driving unit, wherein the adjusting baffle is movably disposed within the distribution cavity, the adjusting baffles of the multiple adjusting components divide the distribution cavity into a coal inlet cavity and multiple coal outlet cavities, the coal powder inlet is connected to the coal inlet cavity, and the multiple coal outlet cavities are connected to multiple coal powder outlets in a one-to-one correspondence, and the driving unit can drive the adjusting baffle to move in order to adjust the opening degree of the inlet of the corresponding coal outlet cavity.

2. The pulverized coal distribution device according to claim 1, characterized in that, Each of the adjusting components includes two rotating shafts, two adjusting baffles, and a driving unit. The rotating shafts are located within the distribution chamber. The two adjusting baffles are respectively disposed on the two rotating shafts. The driving unit is connected to the rotating shafts to drive the rotating shafts to rotate. The two adjusting baffles of each adjusting component rotate in a mutually adjacent direction to reduce the opening of the coal outlet chamber inlet. The two adjusting baffles of each adjusting component rotate in a mutually distant direction to increase the opening of the coal outlet chamber inlet.

3. The pulverized coal distribution device according to claim 2, characterized in that, The pulverized coal inlet and the pulverized coal outlet are located on both sides of the housing in a first direction; The diameter of the distribution cavity increases in the first direction away from the pulverized coal inlet; The rotating shaft is adjacent to the pulverized coal outlet in the first direction; In a cross section perpendicular to the first direction, the projection of the rotating shaft is located outside the projection of the pulverized coal outlet, the two rotating shafts are at an angle, and the distance between the two rotating shafts decreases along the central axis of the adjacent distribution chamber.

4. The pulverized coal distribution device according to claim 3, characterized in that, The housing includes a first plate and a side ring plate. The thickness direction of the first plate is the first direction. A plurality of coal powder outlets are opened on the first plate. The outer periphery of the first plate is circular. The side ring plate has a first opening and a second opening on both sides of the first direction. The outer edge of the first plate is connected to the edge of the side ring plate that defines the first opening. The second opening defines the coal powder inlet. The inner wall surface of the side ring plate is curved, and the adjusting baffle is a fan-shaped plate that mates with the inner wall surface of the side ring plate.

5. The pulverized coal distribution device according to claim 4, characterized in that, The distribution cavity is generally a hemispherical cavity, and the inner wall surface of the side ring plate is spherical. Each adjustment baffle includes a first straight edge, a second straight edge, and a third arc-shaped edge. The distance between the third arc-shaped edge and the inner wall surface of the side ring plate is less than or equal to a first preset value. The first straight edge is connected to the corresponding rotating shaft. The second straight edges of the two adjustment baffles of each adjustment member rotate in a direction adjacent to each other to reduce the opening of the coal outlet cavity inlet. The two adjustment baffles of each adjustment member rotate in a direction away from each other to increase the opening of the coal outlet cavity inlet.

6. The pulverized coal distribution device according to claim 4, characterized in that, Each of the adjustment components includes two drive units, each drive unit including a drive handle and a dial, both of which are located on the outside of the housing; Each of the dials is marked with scale lines to indicate the rotation angle of the drive handle.

7. The pulverized coal distribution device according to claim 6, characterized in that, Each of the dials has a first arc groove extending along a first arc line, the center of which is located on the central axis of the rotating shaft connected to the drive handle. The drive handle has a fastening hole, and the drive handle and the dials are connected by a fastener passing through the first arc groove and the fastening hole. One of the two axes of each adjustment member extends in a second direction and the other extends in a third direction, wherein any two of the first direction, the second direction and the third direction are perpendicular to each other.

8. The pulverized coal distribution device according to claim 7, characterized in that, The pulverized coal outlets are four; A first mounting housing is provided at the middle position of the first plate. The first mounting housing includes multiple side plates and a bottom plate. The multiple side plates are connected in sequence in the circumferential direction. The multiple side plates are connected to the bottom plate and the first plate on both sides in the first direction, respectively. The multiple side plates and the bottom plate define a first mounting groove with the opening facing outward. A first sealing part is provided on the side plate. A part of the first sealing part extends into the distribution cavity and is connected to the first end of the corresponding rotating shaft. The outer periphery of the housing is provided with a plurality of second mounting plates spaced apart circumferentially. The second mounting plates are provided with a second sealing part located on the outside of the housing. A part of the drive handle extends into the second sealing part and is connected to the corresponding rotating shaft. The outer side of the housing is provided with an annular plate connected to the pulverized coal inlet and the pulverized coal outlet.

9. The pulverized coal distribution device according to any one of claims 1-8, characterized in that, The housing includes an inner ceramic layer and an outer protective layer.

10. A pulverized coal conveying device, characterized in that, include Coarse separator; Multiple primary air ducts; A pulverized coal distribution device, wherein the pulverized coal distribution device is the pulverized coal distribution device according to any one of claims 1-9, wherein the outlet of the coarse separator is connected to the pulverized coal inlet of the pulverized coal distribution device, and the plurality of primary air ducts are respectively connected to the plurality of pulverized coal outlets.

Images