Uniform powder feeding device of power plant powder feeder

Abstract

The invention discloses a uniform pulverized coal feeding device of a pulverized coal feeder of a power plant, and relates to the technical field of coal-fired boilers. Comprising a powder feeding side wall, a circle of powder feeding frame body is rotationally connected between the inner walls of the two sides of the powder feeding side wall, a plurality of evenly-distributed powder feeding sliding grooves are formed in the outer edge of the powder feeding frame body, and a partition plate is slidably connected between the inner walls of the powder feeding sliding grooves. According to the powder feeding device, the evenly-distributed partition plates are arranged, every two adjacent partition plates are matched with the powder feeding side wall, the containing spaces with the same size are combined, the containing spaces are used for containing powder with the same volume, and therefore all the powder has the same mass, and meanwhile the pushing springs are arranged, so that the powder feeding effect is improved. The partition plate is tightly attached to the powder feeding side wall, mutual flowing of powder in different spaces is avoided, the corresponding powder is driven by rotation of the partition plate to move and guided out through the powder feeding channel, the purpose of uniform discharging is achieved, and stable combustion of a power plant boiler is supported.

Description

Technical Field

[0001] The invention relates to the technical field of coal-fired boilers, in particular to a uniform powder feeding device for a powder feeder in a power plant. Background Art

[0002] Coal-fired boilers are commonly used as energy sources for thermal power generation. Coal-fired boilers refer to thermal power equipment that heats heat medium water or other organic heat carriers (such as thermal oil, etc.) to a certain temperature (or pressure) by burning coal in the furnace to release heat. The main components are: pot (heating surface) + furnace (fire-generating system); main auxiliary machines: air blower, exhaust blower, primary blower, coal mill, and the boiler needs a quantitative feeding device to quantitatively feed the powder before the powder feeding device can feed the powder for combustion. Most of the existing powder feeding devices use loss-in-weight metering feeders, and the basic structure is an impeller powder feeder, a pneumatic butterfly valve, a metering bucket, a weighing sensor, and a feeding device.

[0003] In actual use, the metering and discharging in the existing device are realized by separate structures, and the integrity of the equipment is poor. The pneumatic butterfly valve is controlled to discharge the material first, and the pneumatic butterfly valve is controlled to close when the weight measured by the weighing sensor in the metering bucket reaches the standard. In this process, when the butterfly valve is closed, some powder will be exposed through the gap that has not yet closed, making the discharge quantity inaccurate. However, if the butterfly valve is closed in advance, the discharge quantity is more difficult to control, resulting in uneven powder feeding in the power plant, affecting the power generation efficiency. Therefore, a uniform powder feeding device for a power plant powder feeder is developed. Summary of the invention

[0004] The main purpose of the present invention is to provide a uniform powder feeding device for a powder feeder in a power plant, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A uniform powder feeding device for a powder feeder in a power plant comprises a powder containing frame, a circle of powder feeding side walls being fixedly connected to the bottom side of the powder containing frame, a powder feeding rotating shaft being rotatably connected between the inner walls on both sides of the powder feeding side walls, a circle of powder feeding frame being fixedly connected to the outer edge of the powder feeding rotating shaft, a plurality of evenly distributed powder feeding chutes being provided at the outer edge of the powder feeding frame, a partition plate being slidably connected between the inner walls of each of the powder feeding chutes, the outer edge of each of the partition plates being in contact with the corresponding inner walls of the powder feeding side walls, the two sides of each of the partition plates being in contact with the corresponding inner walls of the powder feeding side walls, and a powder delivery channel being fixedly connected to the bottom side of the powder feeding side walls.

[0007] Preferably, each partition plate is fixedly connected to a plurality of evenly distributed pushing springs on the side facing the powder feeding frame, and each partition plate is rotatably connected to a connecting roller on the side facing away from the powder feeding frame, and the outer edge of each connecting roller is in rotational contact with the corresponding inner wall of the powder feeding side wall.

[0008] Preferably, a powder feeding motor is fixedly connected to an outer wall of one side of the powder feeding side wall, the output end of the powder feeding motor is fixedly connected to the powder feeding shaft, and a shielding curtain is fixedly connected to both sides of each partition plate, and each of the shielding curtains is fixedly connected to the outer edge of the powder feeding frame.

[0009] Preferably, a powder feeding channel is fixedly connected to the bottom side of the powder feeding side wall, the bottom side of the powder feeding channel is connected to the top side of the powder delivery channel, and a pushing arc wall is provided at the connection between the powder feeding channels.

[0010] Preferably, an air pump is fixedly connected to one side of the powder delivery channel, and a plurality of evenly distributed blast pipes are provided at the output end of the air pump, and each of the blast pipes extends to the interior of the powder delivery channel.

[0011] Preferably, a powder feeding port is provided on the top side of the powder feeding channel, the powder feeding port and the powder feeding channel are adapted to each other, a ventilation frame is fixedly connected to the inner wall of the powder feeding port facing the air pump, the outer edge of the ventilation frame is fixedly connected to the inner wall of the powder feeding channel, and a powder feeding ramp is provided on the top side of the ventilation frame.

[0012] Preferably, a vent is provided on the surface of the vent frame, and a layer of separation filter is fixedly connected between the inner walls of the vent.

[0013] Preferably, a spring sheet is fixedly connected to the inner wall of the powder feeding port on one side facing away from the air pump, and the bottom side of the spring sheet extends to the inside of the powder feeding channel.

[0014] Preferably, a spring shaft is rotatably connected between the inner walls on both sides of the powder feeding channel, and a plurality of evenly distributed fan blades are fixedly connected to the outer edge of the spring shaft, and the outer edge of each fan blade can contact the corresponding side of the spring piece.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By setting up evenly distributed partition plates, utilizing the cooperation of two adjacent partition plates and the powder feeding side wall, accommodating spaces of the same size are combined, and these accommodating spaces are utilized to hold powder materials of the same volume, so that each portion of powder material has the same mass. At the same time, utilizing the setting of the pushing spring, the partition plates and the powder feeding side walls are kept in close contact to prevent the powder materials in different spaces from flowing mutually. The rotation of the partition plates is utilized to drive the corresponding powder materials to move, and the powder materials are discharged through the powder feeding channel, so as to achieve the purpose of uniform discharge and support the stable combustion of the power plant boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an isometric view of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the powder feeding device of the present invention;

[0019] Figure 3 This is a schematic diagram of the powder containing frame structure of the present invention;

[0020] Figure 4 It is a schematic structural diagram of a uniform powder feeding device of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the powder feeding device of the present invention;

[0022] Figure 6 It is a schematic diagram of the powder feeding channel structure of the present invention;

[0023] Figure 7 It is a schematic diagram of the structure of the powder-bombing device of the present invention.

[0024] In the figure: 101, powder containing frame; 102, powder feeding motor; 103, powder feeding side wall; 104, pushing arc wall; 105, powder feeding channel; 201, partition plate; 202, powder feeding shaft; 203, powder feeding frame; 204, pushing spring; 205, powder feeding chute; 206, connecting roller; 207, shielding curtain; 301, powder delivery channel; 302, fan blade; 303, spring piece; 304, powder feeding port; 305, powder feeding ramp; 306, ventilation frame; 307, partition filter; 308, plucking shaft; 401, air pump; 402, blast pipe. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1-Figure 7 , the present invention provides a technical solution:

[0029] A uniform powder feeding device for a powder feeder in a power plant comprises a powder containing frame 101, a powder containing frame 101 having a circle of powder feeding side walls 103 fixedly connected to the bottom side thereof, a powder feeding shaft 202 rotatably connected between the inner walls on both sides of the powder feeding side walls 103, an outer edge of the powder feeding shaft 202 having a circle of powder feeding frame 203 fixedly connected thereto, an outer edge of the powder feeding frame 203 having a plurality of evenly distributed powder feeding chutes 205, a partition plate 201 slidably connected between the inner walls of each powder feeding chute 205, an outer edge of each partition plate 201 being in contact with the corresponding inner wall of the powder feeding side walls 103, both sides of each partition plate 201 being in contact with the corresponding inner wall of the powder feeding side walls 103, a powder feeding channel 105 fixedly connected to the bottom side of the powder feeding side walls 103, and the bottom side of the powder feeding channel 105 being in communication with the top side of a powder delivery channel 301.

[0030] In this embodiment, the carbon powder is placed in the powder holding frame 101, and flows naturally into the space between the two adjacent partition plates 201 by gravity, and the carbon powder is pushed into the space formed by the adjacent partition plates 201 and the inner wall of the powder feeding side wall 103 by the rotation of the powder feeding shaft 202. Because the outer edge of the partition plate 201 and the inner wall of the powder feeding side wall 103 are in close contact, the carbon powder will not flow between the two spaces, ensuring that the carbon powder in each space has a similar volume and thus has a similar mass. In addition, the two adjacent partition plates 201 can contact the inner walls of the powder feeding channel 105 on both sides at the same time, so that when a partition plate 201 rotates to the space between the inner walls of the powder feeding channel 105, at most only the two spaces adjacent to the partition plate 201 are connected to the inside of the powder feeding channel 105, and one of the spaces has already poured out the coal powder therein, thereby ensuring that when the powder feeding shaft 202 rotates at a uniform speed, only the coal powder in one space will be poured out at the same time, achieving a uniform discharge effect.

[0031] A plurality of evenly distributed pushing springs 204 are fixedly connected to the side of each partition plate 201 facing the powder feeding frame 203, and a connecting roller 206 is rotatably connected to the side of each partition plate 201 facing away from the powder feeding frame 203, and the outer edge of each connecting roller 206 is in rotational contact with the corresponding inner wall of the powder feeding side wall 103. A powder feeding motor 102 is fixedly connected to the outer wall of one side of the powder feeding side wall 103, and the output end of the powder feeding motor 102 is fixedly connected to the powder feeding shaft 202. A shielding curtain 207 is fixedly connected to both sides of each partition plate 201, and each shielding curtain 207 is fixedly connected to the outer edge of the powder feeding frame 203. In this embodiment, the setting of the pushing spring 204 makes the partition plate 201 and the powder feeding side wall 103 fit more closely, and the setting of the connecting roller 206 makes the rotation of the partition plate 201 smoother, and the setting of the shielding curtain 207 prevents the coal powder from flowing into the powder feeding chute 205, and each pushing spring 204 is fixedly connected to the inner wall of the corresponding powder feeding chute 205.

[0032] The connection between the powder feeding channel 105 and the powder feeding channel 105 is provided with a pushing arc wall 104. The setting of the stack partition plate 201 of the pushing arc wall 104 is gradually compressed, so that it can transition more smoothly from the powder feeding channel 105 to the inside of the powder feeding side wall 103. An air pump 401 is fixedly connected to one side of the powder feeding channel 301, and a plurality of evenly distributed blast pipes 402 are provided at the output end of the air pump 401, and each blast pipe 402 extends to the inside of the powder feeding channel 301. In this embodiment, air is supplied to the powder feeding channel 301 through the operation of the air pump 401, and one end of the powder feeding channel 301 is connected to the boiler, so that the coal powder is blown into the boiler for combustion.

[0033] A powder feeding port 304 is provided on the top side of the powder delivery channel 301, and the powder feeding port 304 is adapted to the powder feeding channel 105. A ventilation frame 306 is fixedly connected to the inner wall of the powder feeding port 304 facing the air pump 401, and the outer edge of the ventilation frame 306 is fixedly connected to the inner wall of the powder delivery channel 301, and a powder feeding ramp 305 is provided on the top side of the ventilation frame 306. A vent is provided on the surface of the ventilation frame 306, and a layer of separation filter 307 is fixedly connected between the inner walls of the vent. In this embodiment, the separation filter 307 is provided to prevent coal powder from entering the air pump 401, and the powder feeding ramp 305 is provided to prevent coal powder from being blocked by the ventilation frame 306.

[0034] A spring piece 303 is fixedly connected to the inner wall of the powder feeding port 304 facing away from the air pump 401, and the bottom side of the spring piece 303 extends to the inside of the powder feeding channel 301. A plucked shaft 308 is rotatably connected between the inner walls on both sides of the powder feeding channel 301, and the outer edge of the plucked shaft 308 is fixedly connected to a plurality of evenly distributed fan blades 302, and the outer edge of each fan blade 302 can contact the corresponding side of the spring piece 303. In this embodiment, the fan blade 302 is driven by the air pump 401 to rotate, and the fan blade 302 will collide with the spring piece 303 during the rotation process, and the spring piece 303 is elastic, so that the fan blade 302 can pass through the space occupied by the spring piece 303, and the vibration of the spring piece 303 will be transmitted to the powder feeding channel 105 and the powder feeding side wall 103, so that the coal powder attached to the inner wall of the powder feeding channel 105 and the powder feeding side wall 103 is shaken off, making the powder feeding work more thorough.

[0035] It should be noted that the present invention, as a uniform powder feeding device for a powder feeder in a power plant, achieves the following technical effects: by setting up evenly distributed partition plates 201, utilizing the cooperation of two adjacent partition plates 201 and the powder feeding side wall 103, a holding space with the same size is combined, and these holding spaces are utilized to hold powder materials of the same volume, so that each portion of powder material has the same mass, and at the same time, utilizing the setting of the pushing spring 204, the partition plate 201 and the powder feeding side wall 103 are kept in close contact to prevent the powder materials in different spaces from flowing to each other, and utilizing the rotation of the partition plate 201 to drive the corresponding powder materials to move, and to be discharged through the powder feeding channel 105, so as to achieve the purpose of uniform discharge and support the stable combustion of the power plant boiler.

[0036] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached embodiments and their equivalents.

Claims

1. A uniform powder feeding device for a powder feeder in a power plant, comprising a powder containing frame (101), characterized in that: A circle of powder feeding side walls (103) are fixedly connected to the bottom side of the powder containing frame (101); a powder feeding rotating shaft (202) is rotatably connected between the inner walls on both sides of the powder feeding side walls (103); a circle of powder feeding frame (203) is fixedly connected to the outer edge of the powder feeding rotating shaft (202); a plurality of evenly distributed powder feeding chutes (205) are provided on the outer edge of the powder feeding frame (203); a partition plate (201) is slidably connected between the inner walls of each of the powder feeding chutes (205); the outer edge of each of the partition plates (201) is in contact with the corresponding inner wall of the powder feeding side walls (103); both sides of each of the partition plates (201) are in contact with the corresponding inner wall of the powder feeding side walls (103); and a powder feeding channel (301) is fixedly connected to the bottom side of the powder feeding side walls (103).

2. The uniform powder feeding device for a powder feeder in a power plant according to claim 1, characterized in that: A plurality of evenly distributed pushing springs (204) are fixedly connected to the side of each partition plate (201) facing the powder feeding frame (203), and a connecting roller (206) is rotatably connected to the side of each partition plate (201) facing away from the powder feeding frame (203), and the outer edge of each connecting roller (206) is in rotational contact with the corresponding inner wall of the powder feeding side wall (103).

3. The uniform powder feeding device for a powder feeder in a power plant according to claim 1, characterized in that: A powder feeding motor (102) is fixedly connected to an outer wall of one side of the powder feeding side wall (103); an output end of the powder feeding motor (102) is fixedly connected to a powder feeding rotating shaft (202); and a shielding curtain (207) is fixedly connected to both sides of each partition plate (201); and each shielding curtain (207) is fixedly connected to the outer edge of the powder feeding frame (203).

4. The uniform powder feeding device for a powder feeder in a power plant according to claim 1, characterized in that: A powder feeding channel (105) is fixedly connected to the bottom side of the powder feeding side wall (103), the bottom side of the powder feeding channel (105) is connected to the top side of the powder delivery channel (301), and a pushing arc wall (104) is provided at the connection between the powder feeding channel (105) and the powder feeding channel (105).

5. The uniform powder feeding device for a powder feeder in a power plant according to claim 4, characterized in that: An air pump (401) is fixedly connected to one side of the powder delivery channel (301), and a plurality of evenly distributed blast pipes (402) are provided at the output end of the air pump (401), and each of the blast pipes (402) extends to the interior of the powder delivery channel (301).

6. The uniform powder feeding device for a powder feeder in a power plant according to claim 5, characterized in that: A powder feeding port (304) is provided on the top side of the powder feeding channel (301), and the powder feeding port (304) is adapted to the powder feeding channel (105). A ventilation frame (306) is fixedly connected to the inner wall of the powder feeding port (304) facing the air pump (401), and the outer edge of the ventilation frame (306) is fixedly connected to the inner wall of the powder feeding channel (301), and a powder feeding ramp (305) is provided on the top side of the ventilation frame (306).

7. The uniform powder feeding device for a powder feeder in a power plant according to claim 6, characterized in that: A vent is provided on the surface of the vent frame (306), and a layer of separation filter (307) is fixedly connected between the inner walls of the vent.

8. The uniform powder feeding device for a powder feeder in a power plant according to claim 6, characterized in that: A spring sheet (303) is fixedly connected to the inner wall of the powder feeding port (304) on one side facing away from the air pump (401), and the bottom side of the spring sheet (303) extends to the inside of the powder feeding channel (301).

9. The uniform powder feeding device for a powder feeder in a power plant according to claim 8, characterized in that: A spring shaft (308) is rotatably connected between the inner walls on both sides of the powder delivery channel (301), and a plurality of evenly distributed fan blades (302) are fixedly connected to the outer edge of the spring shaft (308), and the outer edge of each fan blade (302) can contact the corresponding side of the spring sheet (303).

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