Rapid coal type switching device, coal feeder and fire coal blending device

Abstract

The utility model discloses a rapid coal type switching device, a coal feeder and a fire coal blending device, the rapid coal type switching device comprises a first communicating pipe and a second communicating pipe; the first communicating pipe and the second communicating pipe are communicated with each other, so that the first coal inlet, the second coal inlet and the first coal outlet are communicated with each other to form a three-way structure, and the end face direction of the second coal outlet of the second communicating pipe and the axis direction of the first communicating pipe are inclined to form an included angle, so that the mechanical characteristics of the pipe wall of the first communicating pipe and the coal material are changed; in addition, after being guided out of the second coal outlet of the second communicating pipe, the coal directly enters the coal feeder from the first coal outlet, the retention time of the coal in the first communicating pipe is shortened, and therefore blockage in the first communicating pipe is avoided. According to the coal type rapid switching device, blockage of coal materials is avoided, the coal feeding efficiency is improved, and then the power generation efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power generation equipment, and particularly relates to a coal type rapid switching device, a coal feeder and a coal blending device. Background Art

[0002] The raw coal bins in a thermal power plant are generally arranged horizontally in rows and adjacent to each other. The adjacent raw coal bins can be interconnected through a coal conveying pipeline connected between the two raw coal bins. At present, the existing interconnection technology between adjacent coal bins can realize rapid fuel switching of a coal feeder by two interconnected coal bins when the boiler performs deep peak shaving, so as to meet the requirements of the boiler for participating in power grid peak shaving.

[0003] Since the lower part of the raw coal bin is connected to the corresponding coal feeder through a connecting section. When the coal coming from the raw coal bin has a large water content and strong agglomeration, frequent blockages are likely to occur in this connecting section. Moreover, when the coal transported from the interconnection pipe of the adjacent raw coal bin also passes through this connecting section and enters the coal feeder, the probability of blockage increases, resulting in low feeding efficiency and low power generation efficiency. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the connecting section between the raw coal bin and the coal feeder in the prior art is prone to blockage, resulting in low feeding efficiency, so as to provide a coal type rapid switching device, a coal feeder and a coal blending device.

[0005] To solve the above technical problem, the technical solution of the utility model is as follows:

[0006] A coal type rapid switching device includes: a first connecting pipe and a second connecting pipe; a first coal inlet is arranged at the top of the first connecting pipe, a first coal outlet is arranged at the bottom of the first connecting pipe, and a communication port is arranged on the side wall of the first connecting pipe along its length direction; a second coal inlet is arranged at the top of the second connecting pipe, a second coal outlet is arranged at the bottom of the second connecting pipe, the second connecting pipe is inclined, and the second coal outlet is hermetically connected to the communication port so that the first coal inlet, the second coal inlet and the first coal outlet form a tee structure; the end face direction of the second coal outlet is arranged at an inclined angle with respect to the axis direction of the first connecting pipe, and the lower edge of the second coal outlet abuts against the upper end face of the first coal outlet.

[0007] According to some embodiments of the utility model, the coal type rapid switching device further includes an electromagnetic vibrator, and the electromagnetic vibrator is arranged outside the second connecting pipe and is close to the second coal outlet.

[0008] According to some embodiments of the present utility model, the first connecting pipe has a conical tubular structure, the second connecting pipe has a rectangular tubular structure, and the cross-section of the connecting port is rectangular.

[0009] According to some embodiments of the present utility model, the length of the second coal outlet in the vertical direction is at least greater than half of the length of the first connecting pipe.

[0010] According to some embodiments of the present utility model, in the horizontal direction, the height of the second coal inlet is higher than the height of the first coal inlet.

[0011] According to some embodiments of the present utility model, a first plug valve is provided at the first coal inlet, and a second plug valve is provided at the second coal inlet.

[0012] A coal feeder includes the coal type quick switching device as described above, and the coal type quick switching device is provided at the inlet.

[0013] A coal blending device for burning coal includes: a first raw coal bunker, a second raw coal bunker, and a coal type quick switching device; a first coal feeder is provided at the bottom of the first raw coal bunker, and an interconnection interface is provided on the side wall of the first raw coal bunker; a second coal feeder is provided at the bottom of the second raw coal bunker, and the first raw coal bunker and the second raw coal bunker are arranged adjacent to each other at intervals; the coal type quick switching device is provided at the inlet of the second coal feeder, the first connecting pipe is connected to the outlet of the second raw coal bunker, and the second connecting pipe is connected to the interconnection interface through an interconnection pipeline.

[0014] The technical solution of the present utility model has the following advantages:

[0015] The coal type quick switching device provided by the present utility model has the first connecting pipe and the second connecting pipe communicating with each other, so that the first coal inlet, the second coal inlet, and the first coal outlet communicate with each other to form a tee structure. The end face direction of the second coal inlet is arranged at an inclined angle with respect to the axis direction of the first connecting pipe, and the lower edge of the second coal outlet abuts against the upper end face of the first coal outlet; the first connecting pipe and the second connecting pipe are adapted to convey different coal types, and the end face direction of the second coal outlet of the second connecting pipe is inclined at an angle with respect to the axis direction of the first connecting pipe, thereby changing the mechanical characteristics between the wall of the first connecting pipe and the coal material, avoiding the formation of agglomeration of the coal material in the first connecting pipe. In addition, after the coal material is discharged from the second coal outlet of the second connecting pipe, it directly enters the coal feeder from the first coal outlet, reducing the residence time in the first connecting pipe, thereby avoiding blockage in the first connecting pipe. The coal type quick switching device realizes the switching and conveying of coal types through the first connecting pipe and the second connecting pipe, and at the same time, by changing the mechanical characteristics of the coal material, it avoids the formation of agglomeration of the coal material in the first connecting pipe, avoids the blockage of the coal material, improves the coal conveying efficiency, and further ensures the power generation efficiency. Description of the Drawings

[0016] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a coal type quick switching device provided in some embodiments of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of a coal blending device provided in some embodiments of the present utility model.

[0019] Explanation of reference numerals: 1. Coal type quick switching device; 2. First raw coal bunker; 3. Second raw coal bunker; 4. First coal feeder; 5. Second coal feeder; 6. Interconnected pipeline; 11. First connecting pipe; 12. Second connecting pipe; 13. Electromagnetic vibrator; 111. First coal inlet; 112. First coal outlet; 113. First plug valve; 121. Second coal inlet; 122. Second coal outlet; 123. Second plug valve. Specific embodiments

[0020] The following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Referring to Figure 1 As shown, in some embodiments of the present utility model, a rapid coal type switching device 1 is provided, including: a first communication pipe 11 and a second communication pipe 12; a first coal inlet 111 is provided at the top of the first communication pipe 11, a first coal outlet 112 is provided at the bottom of the first communication pipe 11, and a communication port is formed in the side wall of the first communication pipe 11 along its length direction; a second coal inlet 121 is provided at the top of the second communication pipe 12, a second coal outlet 122 is provided at the bottom of the second communication pipe 12, the second communication pipe 12 is inclined, and the second coal outlet 122 is hermetically connected to the communication port so that the first coal inlet 111, the second coal inlet 121, and the first coal outlet 112 form a tee structure; the end face direction of the second coal outlet 122 is inclined with respect to the axis direction of the first communication pipe 11, and the lower edge of the second coal outlet 122 abuts against the upper end face of the first coal outlet 112.

[0025] Specifically, the first connecting pipe 11 and the second connecting pipe 12 are interconnected so that the first coal inlet 111, the second coal inlet 121 and the first coal outlet 112 are interconnected to form a tee structure. The end face direction of the second coal inlet 121 is arranged at an inclined angle with the axis direction of the first connecting pipe 11, and the lower edge of the second coal outlet 122 abuts against the upper end face of the first coal outlet 112. The first connecting pipe 11 and the second connecting pipe 12 are adapted to convey different coal types. The end face direction of the second coal outlet 122 of the second connecting pipe 12 is inclined at an angle with the axis direction of the first connecting pipe 11, thereby changing the mechanical characteristics between the wall of the first connecting pipe 11 and the coal material, avoiding the formation of agglomeration of the coal material in the first connecting pipe 11. In addition, after the coal material is discharged from the second coal outlet 122 of the second connecting pipe 12, it directly enters the coal feeder from the first coal outlet 112, reducing the residence time in the first connecting pipe 11, thereby avoiding blockage in the first connecting pipe 11. The coal type quick switching device 1 realizes the switching and conveying of coal types through the first connecting pipe 11 and the second connecting pipe 12, and at the same time, by changing the mechanical characteristics of the coal material, the mechanical characteristics include: the magnitude and direction of the force on the coal material, thereby avoiding the formation of agglomeration of the coal material in the first connecting pipe 11, avoiding blockage of the coal material, improving the coal conveying efficiency, and further ensuring the power generation efficiency.

[0026] It can be understood that the first connecting pipe 11 is arranged in the vertical direction, and the axis direction of the first connecting pipe 11 is consistent with the vertical direction, thereby reducing the impact of the coal material on the side wall of the first connecting pipe 11 and avoiding agglomeration on the inner wall of the first connecting pipe 11.

[0027] In some embodiments of the present invention, the coal type quick switching device 1 further includes an electromagnetic vibrator 13. The electromagnetic vibrator 13 is arranged on the outer side of the second connecting pipe 12 and is close to the second coal outlet 122.

[0028] Specifically, the second connecting pipe 12 is inclined. Under the action of gravity, the coal material is prone to agglomeration on the inner side of the second connecting pipe 12. By arranging the electromagnetic vibrator 13 on the outer side of the second connecting pipe 12 and the electromagnetic vibrator 13 is close to the second coal outlet 122, it is to prevent the coal material from agglomerating on the bottom side wall of the second connecting pipe 12.

[0029] It can be understood that the number of the electromagnetic vibrators 13 can be set to multiple, and the multiple electromagnetic vibrators 13 are evenly spaced along the length direction of the second connecting pipe 12, thereby ensuring the smoothness of the coal material feeding.

[0030] In some embodiments of the present invention, the first connecting pipe 11 has a conical tubular structure, the second connecting pipe 12 has a rectangular tubular structure, and the cross section of the connecting port is rectangular.

[0031] Specifically, the first connecting pipe 11 is in a conical tubular structure, which exerts a uniform force on the coal material. Since the cross-sectional area decreases from top to bottom, it is easy to form caking on the inner side wall of the first connecting pipe 11. Therefore, a connecting port is opened on the side wall of the first connecting pipe 11, and the second coal outlet 122 of the second connecting pipe 12 is connected to the connecting port. The connecting port is rectangular, and the second connecting pipe 12 is in a rectangular tubular structure. The structure of the polyhedral cavity overcomes the uniform force on the coal material, thereby changing the mechanical properties of the coal material and preventing the coal material from forming caking in the first connecting pipe 11 and the second connecting pipe 12.

[0032] In some embodiments of the present invention, the length of the second coal outlet 122 in the vertical direction is at least greater than half of the length of the first connecting pipe 11.

[0033] It can be understood that the length of the second coal outlet 122 in the vertical direction is at least greater than half of the length of the first connecting pipe 11, that is, the length of the connecting port is longer than half of the length of the first connecting pipe 11, so as to ensure the smooth flow of the coal material through the second coal outlet 122.

[0034] In some embodiments of the present invention, in the horizontal direction, the height of the second coal inlet 121 is higher than the height of the first coal inlet 111.

[0035] Specifically, since the second connecting pipe 12 is inclined, the height of the second coal inlet 121 is set higher than the height of the first coal inlet 111, so as to ensure that the potential energy of the coal material in the second connecting pipe 12 increases and it passes through the second connecting pipe 12 in a shorter time, thereby preventing caking from forming in the second connecting pipe 12.

[0036] In some embodiments of the present invention, a first plug valve 113 is provided on the first coal inlet 111, and a second plug valve 123 is provided on the second coal inlet 121.

[0037] Specifically, by providing a first plug valve 113 on the first coal inlet 111 and a second plug valve 123 on the second coal inlet 121, by controlling the opening and closing of the first plug valve 113 and the second plug valve 123, the rapid switching of different coal types can be realized.

[0038] A coal feeder includes a coal type rapid switching device 1, and the coal type rapid switching device 1 is arranged at the inlet.

[0039] Refer to Figure 2As shown in the figure, in some embodiments of the present utility model, a coal blending device is provided, including: a first raw coal bunker 2, a second raw coal bunker 3, and a coal type quick switching device 1; a first coal feeder 4 is provided at the bottom of the first raw coal bunker 2, and an interconnection interface is provided on the side wall of the first raw coal bunker 2; a second coal feeder 5 is provided at the bottom of the second raw coal bunker 3, and the first raw coal bunker 2 and the second raw coal bunker 3 are arranged adjacent to each other at intervals; the coal type quick switching device 1 is arranged at the inlet of the second coal feeder 5, the first connecting pipe 11 is connected to the outlet of the second raw coal bunker 3, and the second connecting pipe 12 is connected to the interconnection interface through an interconnection pipeline 6.

[0040] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. A coal type rapid switching device, characterized in that: include: A first connecting pipe (11), wherein a first coal inlet (111) is provided at the top of the first connecting pipe (11), a first coal outlet (112) is provided at the bottom of the first connecting pipe (11), and a connecting port is provided on the side wall of the first connecting pipe (11) along its length direction; a second connecting pipe (12), wherein a second coal inlet (121) is provided at the top of the second connecting pipe (12), a second coal outlet (122) is provided at the bottom of the second connecting pipe (12), the second connecting pipe (12) is arranged obliquely, and the second coal outlet (122) is sealedly connected to the connecting port, so that the first coal inlet (111), the second coal inlet (121) and the first coal outlet (112) form a three-way structure; The end surface direction of the second coal outlet (122) is arranged at an inclined angle with the axial direction of the first connecting pipe (11), and the lower edge of the second coal outlet (122) abuts against the upper end surface of the first coal outlet (112).

2. The coal type rapid switching device according to claim 1 is characterized in that: It also comprises an electromagnetic rapper (13), wherein the electromagnetic rapper (13) is arranged outside the second connecting pipe (12), and the electromagnetic rapper (13) is arranged close to the second coal outlet (122).

3. The coal type rapid switching device according to claim 1, characterized in that: The first connecting pipe (11) is in the form of a conical tube, and the second connecting pipe (12) is in the form of a rectangular tube.

4. The coal type rapid switching device according to claim 3 is characterized in that: The length of the second coal outlet (122) in the vertical direction is at least greater than half the length of the first connecting pipe (11).

5. The coal type rapid switching device according to claim 1, characterized in that: In the horizontal direction, the height of the second coal inlet (121) is higher than the height of the first coal inlet (111).

6. The coal type rapid switching device according to claim 5, characterized in that: The first coal inlet (111) is provided with a first gate valve (113), and the second coal inlet (121) is provided with a second gate valve (123).

7. A coal feeder, characterized in that: The invention comprises a coal type rapid switching device (1) as claimed in any one of claims 1 to 6, wherein the coal type rapid switching device (1) is arranged at an inlet.

8. A coal blending device, characterized in that: include A first raw coal bunker (2), wherein a first coal feeder (4) is provided at the bottom of the first raw coal bunker (2), and an interconnection interface is provided on the side wall of the first raw coal bunker (2); A second raw coal bunker (3), wherein a second coal feeder (5) is provided at the bottom of the second raw coal bunker (3), and the second raw coal bunker (3) and the first raw coal bunker (2) are arranged adjacent to each other in a spaced relationship; The coal type rapid switching device (1) as described in any one of claims 1 to 6, wherein the coal type rapid switching device (1) is arranged at the inlet of the second coal feeder (5), the first connecting pipe (11) is connected to the outlet of the second raw coal bin (3), and the second connecting pipe (12) is connected to the interconnecting interface through an interconnecting pipe (6).

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