Feeding device of circulating fluidized bed boiler

Abstract

The utility model relates to the technical field of boilers, and discloses a feeding device of a circulating fluidized bed boiler, which comprises a box body, a feed port is arranged at the front end of the box body, discharge cavities are respectively arranged on two sides of the rear end of the box body, a plurality of discharge ports are arranged on the discharge cavities, a movable cavity is arranged between the discharge cavities on two sides, and the movable cavity is communicated with the feed port. A second hammer body is slidably arranged in the movable cavity in a limited mode, a sliding sleeve shell is arranged at the top of the front end of the box body, and a first hammer body is slidably arranged in the sliding sleeve shell in a vertical limited mode. According to the feeding device of the circulating fluidized bed boiler, after coal is poured from the feeding opening, primary chiseling is carried out under chiseling of the first hammer body, secondary chiseling is carried out under cooperation of the first hammer body and the second hammer body, and when the second hammer body is recovered for operation, the coal is discharged from the discharging cavities in the two sides of the box body; the feeding device with the function of uniformly chiseling the coal briquettes is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a feeding device for a circulating fluidized bed boiler. Background Art

[0002] The circulating fluidized bed boiler is a highly efficient, energy-saving and environmentally friendly coal-fired boiler. Its main structure consists of two parts: the combustion chamber and the circulating furnace. In the combustion chamber, the fuel (mainly coal) is mixed with air and burned to produce high-temperature flue gas. This high-temperature flue gas then enters the circulating furnace, where a series of separators and return systems are used to separate the solid particles in the flue gas and circulate them back to the combustion chamber, realizing the circulating combustion of the fuel.

[0003] However, since the coal is in a block structure, the uneven combustion surface may lead to incomplete combustion of the coal blocks, producing harmful carbon monoxide gases. If the coal blocks are broken up when feeding, large coal blocks can be avoided, the uniformity of coal combustion can be improved, and the heating efficiency of the boiler can be improved.

[0004] For example, the Chinese utility model patent (application number: CN202321582616.5) discloses "a feeding device for a circulating fluidized bed boiler, including a feeding shell, a hopper, a crushing roller, a transport auger, a grinding belt and a driving mechanism; ... the feeding device can crush and grind the coal in turn before transporting it to the furnace for combustion, so that the transported coal is finer and has a better treatment effect on the coal." Its specification discloses: The circulating fluidized bed boiler adopts fluidized combustion, which is the most industrialized clean coal combustion technology. The circulating fluidized bed boiler system is usually composed of a fluidized bed combustion chamber (furnace), a circulating ash separator, a fly ash return device, a tail heating surface and auxiliary equipment. There is also a feeding device at the front end of the furnace for feeding the coal into the furnace. Since the coal is mostly in large block structure when fed, it usually needs to be crushed. However, the existing feeding devices usually only crush the coal once, which leads to insufficient crushing effect, resulting in incomplete combustion of the coal after entering the furnace; the above patents can prove the defects of the existing technology.

[0005] Therefore, we made improvements to this and proposed a circulating fluidized bed boiler feeding device. Utility Model Content

[0006] In view of the above problems in the prior art, the present utility model is proposed.

[0007] Therefore, the utility model aims to provide a circulating fluidized bed boiler feeding device, which solves the problem that the existing large-lump coal feeding will lead to incomplete combustion.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A circulating fluidized bed boiler feeding device comprises a box body, a feeding port is arranged at the front end of the box body, discharge cavities are arranged on both sides of the rear end of the box body, a plurality of discharge ports are arranged on the discharge cavity, a movable cavity is arranged between the discharge cavities on both sides, a second hammer body is arranged in the movable cavity for limiting sliding, a sliding sleeve is arranged at the top of the front end of the box body, a first hammer body is arranged in the sliding sleeve for vertical limiting sliding, the first hammer body is used for intermittent vertical hammering of block materials in the feeding port, the second hammer body is used for cooperating with the first hammer body for horizontal hammering, the second hammer body slides linearly to block or open the connecting port between the discharge cavity and the feeding port, a driving assembly is arranged on the box body, and the driving assembly is used to control the movement of the first hammer body and the second hammer body.

[0010] As a preferred solution of the circulating fluidized bed boiler feeding device of the utility model, wherein: the upper end surface of the second hammer body is linearly and equidistantly provided with a plurality of second racks, a first movable window is opened above the box body, the second rack is limited to move within the first movable window, and the second racks are respectively connected to the boiler feed port.

[0011] As a preferred solution of the circulating fluidized bed boiler feeding device of the utility model, second movable windows are respectively opened on both sides of the sliding shell, and first transmission shafts distributed vertically are respectively arranged on both sides of the first hammer body, and the first transmission shaft is limited to move within the corresponding second movable window.

[0012] As a preferred solution of the circulating fluidized bed boiler feeding device of the utility model, the driving assembly includes a first transmission shaft, a motor is installed on the box body, the motor is used to drive the first transmission shaft to rotate, a first gear roller is coaxially installed on the first transmission shaft, and the first gear roller is used to mesh with the second rack.

[0013] As a preferred solution of the circulating fluidized bed boiler feeding device of the utility model, a second transmission shaft is arranged on one side of the sliding sleeve, and a third transmission shaft is arranged on the other side, and second gear rollers are coaxially installed on the second transmission shaft and the third transmission shaft, respectively, and the second gear rollers are used to mesh with the corresponding first transmission shaft, and the second gear rollers on both sides are used to simultaneously drive the first hammer to move vertically downward, or simultaneously drive the first hammer to move vertically upward.

[0014] As a preferred solution of the circulating fluidized bed boiler feeding device described in the utility model, wherein: the fourth transmission shaft is movably installed on both side walls of the sliding sleeve, the second transmission shaft and the fourth transmission shaft are connected by a synchronous belt transmission, the ends of the fourth transmission shaft and the third transmission shaft are coaxially installed with gears, the gear of the fourth transmission shaft is meshed with the gear of the third transmission shaft, the end of the third transmission shaft is connected to the end of the first transmission shaft by a synchronous belt transmission, and a toothed structure is arranged on the inner side of the synchronous belt. In the utility model, the first transmission shaft, the second transmission shaft, the fourth transmission shaft and the third transmission shaft are provided with a toothed structure by default at the cooperation places with the synchronous belt, so as to achieve more stable transmission cooperation with the synchronous belt.

[0015] As a preferred solution of the circulating fluidized bed boiler feeding device of the utility model, when the first hammer body falls vertically into the feed port, the second hammer body just contacts the side wall of the first hammer body.

[0016] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0017] 1. The utility model realizes a feeding device with the function of uniformly crushing coal blocks by pouring coal from a feed port, crushing it once under the chiseling of a first hammer, crushing it twice under the cooperation of the first hammer and the second hammer, and discharging the coal from the discharge cavities on both sides of the box body when the second hammer is retracted.

[0018] 2. The utility model provides discharge cavities on both sides of the box body, and each discharge cavity is provided with a plurality of discharge ports. When the discharge ports are all connected to the boiler, more uniform feeding of the boiler can be achieved, thereby further achieving sufficient combustion of coal.

[0019] 3. The utility model can realize the control of the vertical movement of the first hammer body and the horizontal movement of the second hammer body through a motor, and can realize the crushing and exporting of coal, thereby improving the practicability of the coal feeding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the circulating fluidized bed boiler feeding device of the utility model.

[0022] Figure 2 It is a structural schematic diagram of a circulating fluidized bed boiler feeding device of the utility model.

[0023] Figure 3 It is a structural schematic diagram of a circulating fluidized bed boiler feeding device of the utility model.

[0024] Figure 4 It is a structural schematic diagram of a circulating fluidized bed boiler feeding device of the utility model.

[0025] Description of reference numerals:

[0026] 1. Box body; 11. Feed inlet; 12. Discharge chamber; 13. Discharge port; 14. Movable chamber; 15. Sliding casing; 16. First movable window; 17. Second movable window; 2. First hammer body; 21. First rack; 3. Second hammer body; 31. Second rack; 4. Driving assembly; 41. First transmission shaft; 42. First gear roller; 43. Motor; 44. Second transmission shaft; 45. Third transmission shaft; 46. Second gear roller; 47. Fourth transmission shaft. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] The utility model embodiment discloses a circulating fluidized bed boiler feeding device.

[0029] The utility model provides Figure 1-4 A circulating fluidized bed boiler feeding device shown in the figure comprises a box body 1, a feeding port 11 is arranged at the front end of the box body 1, discharge chambers 12 are arranged on both sides of the rear end of the box body 1, and a plurality of discharge ports 13 are arranged on the discharge chamber 12, a movable chamber 14 is arranged between the discharge chambers 12 on both sides, a second hammer body 3 is arranged in the movable chamber 14 for limited sliding, a sliding sleeve 15 is arranged at the top of the front end of the box body 1, a first hammer body 2 is arranged in the sliding sleeve 15 for vertical limited sliding, and the first hammer body 2 is used for intermittent vertical hammering of the block material in the feeding port 11, The second hammer body 3 is used to cooperate with the first hammer body 2 for horizontal hammering. The second hammer body 3 slides in a straight line to block or open the connecting port between the discharge chamber 12 and the feed port 11. A driving assembly 4 is provided on the box body 1. The driving assembly 4 is used to control the movement of the first hammer body 2 and the second hammer body 3. When the first hammer body 2 falls vertically into the feed port 11, the second hammer body 3 just contacts the side wall of the first hammer body 2. A bracket is installed at the bottom of the box body 1, and the horizontal surface of the box body 1 can be set in an inclined shape, which is convenient for the coal to be tilted and poured downward from the feed port to the discharge chamber.

[0030] During installation, the box body 1 is installed at an angle so that the coal can be fed down along the incline from the box body 1 to the discharge chamber 12. The lump coal is poured in from the feed port 11 and the first hammer body 2 is hammered vertically to crush the fast coal. During the upward movement of the first hammer body 2, part of the coal moves to the rear end and passes through the hammering area of ​​the first hammer body 2. When the first hammer body 2 continues to move downward, the second hammer body 3 moves in a straight line toward the feed port 11 to push the above-mentioned part of the fast coal back to the feed port 11. When the first hammer body 2 falls completely, the second hammer body 3 abuts against the box body 1, thereby crushing the coal for a second time and avoiding insufficient crushing. As the first hammer body 2 moves upward, the second hammer body 3 is retracted, and the crushed coal is poured down at an incline into the discharge chamber 12 on both sides and falls from the discharge port 13 into the boiler.

[0031] In order to ensure the stability of the movement of the first hammer body 2 and the second hammer body 3, Figure 1-4 As shown, the upper end surface of the second hammer body 3 is linearly and equidistantly provided with a plurality of second racks 31, a first movable window 16 is provided above the box body 1, and the second rack 31 is limited to move in the first movable window 16, and second movable windows 17 are provided on both sides of the sliding shell 15, respectively. First transmission shafts 41 distributed vertically and linearly are provided on both sides of the first hammer body 2, and the first transmission shaft 41 is limited to move in the corresponding second movable window 17, and the driving component 4 includes a first transmission shaft 41, and a motor 43 is installed on the box body 1, and the motor 43 is used to drive the first transmission shaft 41 to rotate. A first gear roller 42 is coaxially installed on the first transmission shaft 41, and the first gear roller 42 is used to mesh with the second rack 31. By arranging tooth meshing structures on both sides of the first hammer body 2, the stable vertical movement of the first hammer body 2 is ensured, and by arranging a tooth meshing structure above the second hammer body 3, the stable horizontal movement of the second hammer body 3 is ensured.

[0032] In order to drive the component 4 to operate better, Figure 1-4As shown, a second transmission shaft 44 is provided on one side of the sliding housing 15, and a third transmission shaft 45 is provided on the other side. Second gear rollers 46 are coaxially mounted on the second transmission shaft 44 and the third transmission shaft 45, respectively. The second gear rollers 46 are used to mesh with the corresponding first transmission shaft 41. The second gear rollers 46 on both sides are used to simultaneously drive the first hammer body 2 to move vertically downward, or simultaneously drive the first hammer body 2 to move vertically upward. Fourth transmission shafts 47 are movably mounted on the two side walls of the sliding housing 15, respectively. The second transmission shaft 44 is connected to the fourth transmission shaft 47 through a synchronous belt transmission. Gears are coaxially mounted on the ends of the fourth transmission shaft 47 and the third transmission shaft 45, respectively. The gear of the fourth transmission shaft 47 meshes with the gear of the third transmission shaft 45, and the end of the third transmission shaft 45 meshes with the first The ends of the transmission shaft 41 are connected through a synchronous belt drive, and the first transmission shaft 41 is driven by the motor 43 to transmit, so that the third transmission shaft 45 is transmitted. The transmission directions of the first transmission shaft 41 and the third transmission shaft 45 are the same. Since the third transmission shaft 45 is meshed with the fourth transmission shaft 47, the rotation directions of the third transmission shaft 45 and the fourth transmission shaft 47 are opposite, and the transmission direction of the fourth transmission shaft 47 and the second transmission shaft 44 are the same, so that the effect of one motor 43 driving the first transmission shaft 41, the second transmission shaft 44, the third transmission shaft 45 and the fourth transmission shaft 47 to transmit is achieved at the same time. By setting the moving distance of the first hammer body 2 and the second hammer body 3, the entire feeding process of the first hammer body 2 and the second hammer body 3 can be controlled by one motor 43, thereby realizing the energy saving of the feeding device.

[0033] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A circulating fluidized bed boiler feeding device, characterized in that: The invention comprises a box body (1), wherein a feed port (11) is arranged at the front end of the box body (1), discharge chambers (12) are arranged on both sides of the rear end of the box body (1), a plurality of discharge ports (13) are arranged on the discharge chamber (12), a movable chamber (14) is arranged between the discharge chambers (12) on both sides, a second hammer body (3) is arranged in a limited sliding manner in the movable chamber (14), a sliding sleeve (15) is arranged at the top of the front end of the box body (1), and a vertical limiter (13) is arranged in the sliding sleeve (15). A first hammer (2) is slidably arranged, the first hammer (2) is used for intermittently vertically hammering the block material in the feed port (11), the second hammer (3) is used for cooperating with the first hammer (2) to hammer horizontally, the second hammer (3) slides linearly, and is used for blocking or opening the communication port between the discharge cavity (12) and the feed port (11), and a driving component (4) is arranged on the box body (1), and the driving component (4) is used for controlling the movement of the first hammer (2) and the second hammer (3).

2. The circulating fluidized bed boiler feeding device according to claim 1, characterized in that: The upper end surface of the second hammer body (3) is provided with a plurality of second racks (31) at equal intervals in a linear manner, a first movable window (16) is provided above the box body (1), and the second racks (31) are limited and movable within the first movable window (16).

3. The circulating fluidized bed boiler feeding device according to claim 2, characterized in that: Second movable windows (17) are respectively provided on both sides of the sliding housing (15), and first transmission shafts (41) distributed vertically and linearly are respectively provided on both sides of the first hammer body (2), and the first transmission shafts (41) are limited and movable within corresponding second movable windows (17).

4. The circulating fluidized bed boiler feeding device according to claim 3, characterized in that: The driving assembly (4) comprises a first transmission shaft (41); a motor (43) is mounted on the housing (1); the motor (43) is used to drive the first transmission shaft (41) to rotate; a first toothed roller (42) is coaxially mounted on the first transmission shaft (41); the first toothed roller (42) is used to mesh with the second rack (31).

5. The circulating fluidized bed boiler feeding device according to claim 4, characterized in that: A second transmission shaft (44) is disposed on one side of the sliding housing (15), and a third transmission shaft (45) is disposed on the other side. Second gear rollers (46) are coaxially mounted on the second transmission shaft (44) and the third transmission shaft (45), respectively. The second gear rollers (46) are used to mesh with the corresponding first transmission shaft (41). The second gear rollers (46) on both sides are used to simultaneously drive the first hammer body (2) to move vertically downward, or simultaneously drive the first hammer body (2) to move vertically upward.

6. The circulating fluidized bed boiler feeding device according to claim 5, characterized in that: A fourth transmission shaft (47) is movably mounted on both side walls of the sliding housing (15); the second transmission shaft (44) is connected to the fourth transmission shaft (47) via a synchronous belt transmission; gears are coaxially mounted on the ends of the fourth transmission shaft (47) and the third transmission shaft (45); the gear of the fourth transmission shaft (47) is meshed with the gear of the third transmission shaft (45); and the end of the third transmission shaft (45) is connected to the end of the first transmission shaft (41) via a synchronous belt transmission.

7. The circulating fluidized bed boiler feeding device according to claim 6, characterized in that: When the first hammer body (2) falls vertically into the feed port (11), the second hammer body (3) just contacts the side wall of the first hammer body (2).

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