A coal blending and burning device for power plants

Abstract

The present application relates to the technical fields of coal blending and blending combustion in power plants, and particularly relates to a coal blending and blending combustion device for power plants, which comprises a coal blending tank, support columns, a discharging assembly, a storage assembly and a driving assembly; the bottom of the coal blending tank is provided with the support columns and the discharging assembly, and the support columns are annularly distributed around the discharging assembly; the top of the coal blending tank is annularly provided with multiple groups of the storage assemblies; the inside of the coal blending tank is provided with the driving assembly, and the driving assembly controls the multiple groups of the storage assemblies to alternately discharge materials. The multiple groups of the storage assemblies are controlled by the driving assembly to alternately discharge materials, so that the multiple groups of the storage assemblies are conveniently divided into multiple batches, and the materials are alternately, orderly and intermittently discharged, so that the coal materials are more fully mixed, the final blended coal reaches or approaches the design coal requirements of the boiler in performance indexes, and the boiler is high in efficiency, high in output and high in effect.

Description

Technical Field

[0001] This invention relates to the field of coal blending technology in power plants, and in particular to a coal blending device for power plants. Background Technology

[0002] Boilers are one of the most common and essential pieces of equipment in power plants. Co-firing technology refers to the process of mixing and blending different types of coal with different properties in a certain proportion during the combustion of coal in a boiler, and then burning them to generate electricity. The principle is to use the composition of different types of coal to blend and mix them according to requirements, so that the final blended coal meets or approaches the design coal requirements of the boiler in terms of performance indicators, so as to make the boiler more efficient, more powerful, and more effective.

[0003] In the process of blending and preparing coals with different properties, a coal blending and combustion device is needed for ease of preparation. This device facilitates the rapid and thorough mixing of various coals. However, the coal blending and combustion devices commonly available on the market are not convenient for batching and intermittently adding various coals in an orderly manner. Adding too much coal at once, and adding different amounts of each coal, will affect the mixing effect. Furthermore, it is not convenient for grinding larger pieces of coal, which will result in incomplete combustion and energy waste. Summary of the Invention

[0004] The purpose of this invention is to provide a coal blending device for power plants, which can solve the problem in the prior art that it is inconvenient to feed multiple types of coal in batches and intermittently in an orderly manner, thus affecting the mixing effect of the coal materials.

[0005] This invention provides a coal blending and combustion device for power plants, comprising: a coal blending tank, a support column, a discharge assembly, a storage assembly, and a drive assembly;

[0006] The bottom of the coal mixing tank is equipped with support columns and a discharge assembly, and the support columns are arranged in a ring around the discharge assembly;

[0007] The top of the coal mixing tank has multiple sets of storage components arranged in a ring. The inside of the coal mixing tank is equipped with a drive component, which controls the multiple sets of storage components to release materials alternately.

[0008] Preferably, the discharge assembly includes: a baffle plate, a pin, and a spring;

[0009] The baffle plate is rotatably connected to the bottom of the coal mixing tank;

[0010] The pin is slidably connected to one side of the baffle plate, and the top of the pin extends into the coal mixing tank;

[0011] The two ends of the spring are fixedly connected to the choke plate and the pin, respectively.

[0012] Preferably, the lower end of the coal mixing tank has a hole-like structure that matches the insertion pin.

[0013] Preferably, the storage assembly includes: a storage bucket, a support, a discharge plate, and a connecting rod;

[0014] The storage bin is installed on top of the coal mixing tank, and a bracket is installed on the bottom of the storage bin near the inner wall of the coal mixing tank.

[0015] The bottom of the storage hopper is provided with a discharge plate, and a connecting rod is fixed to one end of the discharge plate near the support. The connecting rod is rotatably connected to the support.

[0016] Preferably, the drive assembly includes: a motor, a fixed shaft, a support rod, and a retaining ring;

[0017] The motor is fixedly installed at the top center of the coal mixing tank. The output end of the motor is fixedly connected to a fixed shaft. Support rods are fixedly connected to both sides of the upper end of the fixed shaft. The two support rods are connected to a fixed ring at opposite ends.

[0018] Preferably, the outer wall of the fixed shaft is connected to a first grinding plate and a mixing rod;

[0019] The first grinding plate is located below the fixing ring, and the mixing rod is located below the first grinding plate.

[0020] Preferably, the fixing ring is provided with a plurality of upward protrusions at intervals, and the protrusions are adapted to the connecting rod.

[0021] Preferably, a second grinding plate is welded to the upper inner wall of the coal mixing tank;

[0022] The distance between the first grinding plate and the second grinding plate decreases from top to bottom.

[0023] Preferably, both the first grinding plate and the second grinding plate have protruding structures distributed at their ends that are close to each other.

[0024] Preferably, a guide ring is welded to the bottom of the coal mixing tank.

[0025] Beneficial effects:

[0026] The technical solution of the present invention controls multiple sets of storage components to release materials alternately through a drive component, which facilitates the distribution of multiple sets of storage components into multiple batches, realizing alternating, orderly, and intermittent material release. This makes it easier for the coal to be mixed more thoroughly, so that the final coal mixes meet or approach the boiler's design coal requirements in terms of performance indicators, thereby making the boiler more efficient, more powerful, and more effective. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A three-dimensional front view of the coal blending and combustion device for power plants provided by the present invention;

[0029] Figure 2 This is a schematic diagram of the three-dimensional frontal cross-sectional structure provided by the present invention;

[0030] Figure 3 This is a side cross-sectional view of the material storage assembly provided by the present invention.

[0031] Figure 4 A bottom view of the drive component structure provided by the present invention;

[0032] Figure 5 This is a schematic diagram of the feeding plate in the open state provided by the present invention.

[0033] Explanation of reference numerals in the attached drawings: 1. Coal mixing tank; 2. Support column; 3. Discharge assembly; 31. Cut-off plate; 32. Pin; 33. Spring; 4. Storage assembly; 41. Storage bucket; 42. Bracket; 43. Discharge plate; 44. Connecting rod; 5. Drive assembly; 51. Motor; 52. Fixed shaft; 53. Support rod; 54. Fixing ring; 55. First grinding plate; 56. Mixing rod; 6. Second grinding plate; 7. Guide ring. Detailed Implementation

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] 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," and "counterclockwise," etc., 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 do not 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 limiting this invention.

[0036] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] like Figures 1 to 5 As shown, this embodiment provides a coal blending device for power plants, which includes a coal blending tank 1. Support columns 2 and a discharge assembly 3 are installed at the bottom of the coal blending tank 1. All three support columns 2 are welded to the coal blending tank 1. The arrangement of the three support columns 2 facilitates stable support of the coal blending tank 1. The three support columns 2 are arranged in a ring around the discharge assembly 3, which facilitates the removal of fully blended coal. Four sets of storage assemblies 4 are arranged in a ring on the top of the coal blending tank 1. The arrangement of the four sets of storage assemblies 4 facilitates… Different types of coal are stored to facilitate subsequent blending. A drive assembly 5 is installed in the middle of the coal blending tank 1. The drive assembly 5 allows the four sets of storage assemblies 4 to be fed in two batches alternately. A second grinding plate 6 is welded to the upper inner wall of the coal blending tank 1. The cooperation between the second grinding plate 6 and the first grinding plate 55 facilitates the grinding of larger pieces of coal. A guide ring 7 is welded to the bottom of the inside of the coal blending tank 1. The guide ring 7 facilitates the full outflow of coal.

[0038] It should be noted that there is no limit to the number of storage components 4. They can be set to two, four, six, eight or more groups depending on the actual use. Examples will not be given here.

[0039] In this embodiment, the discharge assembly 3 includes a baffle plate 31, a pin 32, and a spring 33. The baffle plate 31 is installed at the bottom of the coal mixing tank 1 by a rotatable connection. The pin 32 is slidably connected inside the right end of the baffle plate 31. A spring 33 is provided on the outer side of the bottom of the pin 32. The discharge assembly 3 facilitates the removal of fully mixed coal.

[0040] In this embodiment, the two ends of the spring 33 are fixedly connected to the baffle plate 31 and the pin 32 respectively. The top of the pin 32 extends into the hole-like structure opened at the lower right end of the coal mixing tank 1. By using the pin 32, the closed state of the baffle plate 31 can be locked.

[0041] In this embodiment, the storage assembly 4 includes a storage bucket 41, a support 42, a discharge plate 43, and a connecting rod 44. The storage bucket 41 is installed on the top of the coal mixing tank 1 by embedding. The support 42 is welded to the bottom of the storage bucket 41 near the inner wall of the coal mixing tank 1. The discharge plate 43 is provided at the bottom of the storage bucket 41. The connecting rod 44 is welded to the end of the discharge plate 43 near the support 42. The connecting rod 44 is rotatably connected to the support 42. Under the action of the four sets of storage assemblies 4 on the top of the coal mixing tank 1, it is convenient to collect and store various coal materials, and facilitate subsequent feeding and blending.

[0042] In this embodiment, the drive assembly 5 includes a motor 51, a fixed shaft 52, a support rod 53, a fixed ring 54, a first grinding plate 55, and a mixing rod 56. The output end of the motor 51 is fixedly connected to the fixed shaft 52. Support rods 53 are welded to both the left and right ends of the upper end of the fixed shaft 52. The ends of the two support rods 53 that are opposite to each other are welded to the fixed ring 54. The first grinding plate 55 and the mixing rod 56 are welded to the outside of the support rods 53. The mixing rod 56 is located below the first grinding plate 55. By using the drive assembly 5, it is easy to control the four sets of storage assemblies 4 to be divided into two batches. The two batches of storage assemblies 4 are fed alternately, which facilitates the full mixing of various coal materials.

[0043] In this embodiment, the motor 51 is fixedly installed at the top center of the coal mixing tank 1. The front and rear ends of the fixing ring 54 are provided with upward protrusions, and the left and right ends of the protrusions are inclined. By using the setting of the fixing ring 54, it is convenient to control the connecting rod 44 to drive the material discharge plate 43 to rotate and open or close.

[0044] It should be noted that there is no limit to the number of protrusions. They can be set to one, two, three or more groups depending on the number of storage components 4 and the batches to be divided into. Examples will not be given here.

[0045] In this embodiment, during the synchronous rotation of the first grinding plate 55 driven by the fixed shaft 52, the distance between the first grinding plate 55 and the second grinding plate 6 decreases from top to bottom, facilitating the entry of coal lumps between them. Both the first grinding plate 55 and the second grinding plate 6 have protruding structures at their closest points, which can grind larger pieces of coal, facilitating rapid and complete combustion during blending and achieving full utilization of resources.

[0046] The working principle of this invention is as follows:

[0047] In use, firstly, various coal materials are sequentially added into the four storage bins 41 located at the top of the coal mixing tank 1. Then, the motor 51 is started, and the fixed shaft 52 is controlled to drive the fixed ring 54 to rotate stably through the two support rods 53. When the upward protrusions at both ends of the fixed ring 54 rotate to the top of the connecting rod 44, the connecting rod 44 loses the compression of the fixed ring 54, and the connecting rod 44 can drive the discharge plate 43 to rotate and open, so that the two sets of storage components 4 on the same horizontal line can be simultaneously discharged into the coal mixing tank 1. When the upward protrusions of the fixed ring 54 rotate away from the top of the connecting rod 44, the fixed ring 54 can press down on the connecting rod 44 again, so that the connecting rod 44 drives the discharge plate 43 to rotate and close the bottom opening of the storage bin 41. With the uniform rotation of the fixed ring 54, the four sets of storage components 4 can be divided into two batches. The two batches of storage components 4 can be discharged alternately, orderly, and intermittently. Under the rotation of the mixing rod 56, it is easy to fully mix the various coal materials.

[0048] When larger pieces of coal enter between the first grinding plate 55 and the second grinding plate 6, the protruding structures on the surfaces of the first grinding plate 55 and the second grinding plate 6 can grind the larger pieces of coal, facilitating rapid and complete combustion of the coal during blending and achieving full utilization of resources.

[0049] After the various coal materials are mixed and prepared, the collection container is placed under the discharge component 3, and the plug 32 is pulled to separate its top from the coal blending tank 1. Then, the baffle plate 31 is rotated horizontally to open the discharge port at the bottom of the coal blending tank 1, so that the coal can be taken out and used for blending.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal blending and combustion device for power plants, characterized in that, include: Coal mixing tank (1), support column (2), discharge assembly (3), storage assembly (4), and drive assembly (5); The bottom of the coal mixing tank (1) is equipped with a support column (2) and a discharge assembly (3), and the support column (2) is arranged in a ring around the discharge assembly (3); The top of the coal mixing tank (1) is arranged in a ring with multiple sets of storage components (4), and the inside of the coal mixing tank (1) is equipped with a drive component (5), which controls the multiple sets of storage components (4) to release materials alternately. The storage assembly (4) includes: a storage bucket (41), a support (42), a discharge plate (43), and a connecting rod (44); The storage bin (41) is installed on the top of the coal mixing tank (1), and a bracket (42) is installed on the bottom of the storage bin (41) near the inner wall of the coal mixing tank (1). The bottom of the storage hopper (41) is provided with a discharge plate (43), and a connecting rod (44) is fixed at one end of the discharge plate (43) near the support (42). The connecting rod (44) is rotatably connected to the support (42). The drive assembly (5) includes: a motor (51), a fixed shaft (52), a support rod (53), and a retaining ring (54); The motor (51) is fixedly installed at the top center of the coal mixing tank (1). The output end of the motor (51) is fixedly connected to a fixed shaft (52). Support rods (53) are fixedly connected to both sides of the upper end of the fixed shaft (52). The two support rods (53) are connected to a fixed ring (54) at opposite ends. The fixing ring (54) is provided with a number of upward protrusions at intervals, and the protrusions are adapted to the connecting rod (44).

2. The power plant coal blending and combustion device according to claim 1, characterized in that, The discharge assembly (3) includes: a baffle plate (31), a pin (32), and a spring (33); The baffle plate (31) is rotatably connected to the bottom end of the coal mixing tank (1); The pin (32) is slidably connected to one side of the baffle plate (31), and the top of the pin (32) extends into the coal mixing tank (1); The two ends of the spring (33) are fixedly connected to the cut-off plate (31) and the pin (32), respectively.

3. The power plant coal blending and combustion device according to claim 2, characterized in that, The lower end of the coal mixing tank (1) is provided with a hole-like structure that matches the insert (32).

4. The power plant coal blending and combustion device according to claim 1, characterized in that, The outer wall of the fixed shaft (52) is connected to the first grinding plate (55) and the mixing rod (56); The first grinding plate (55) is located below the fixing ring (54), and the mixing rod (56) is located below the first grinding plate (55).

5. The power plant coal blending and combustion device according to claim 4, characterized in that, The upper inner wall of the coal mixing tank (1) is welded with a second grinding plate (6); The distance between the first grinding plate (55) and the second grinding plate (6) decreases from top to bottom.

6. The power plant coal blending and combustion device according to claim 5, characterized in that, Both the first grinding plate (55) and the second grinding plate (6) have protruding structures distributed at their respective ends that are close to each other.

7. The power plant coal blending and combustion device according to claim 1, characterized in that, The bottom of the coal mixing tank (1) is welded with a guide ring (7).

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