Bed material adding device of circulating fluidized bed boiler

Abstract

The invention relates to a circulating fluidized bed boiler bed material adding device which comprises a hearth, a material spraying device and a powder receiving tank car, the front end of the material spraying device is inserted into a manhole and extends into the hearth, a bed material input pipe is arranged at the tail end of the material spraying device, and the bed material inlet end of the bed material input pipe is connected to a powder outlet of the powder receiving tank car; the material spraying device comprises a material spraying head, a material spraying pipe, a walking module and a driving device, the material spraying head is provided with a plurality of nozzles, the front end of the material spraying pipe is provided with the material spraying head, the tail end of the material spraying pipe is arranged in the walking module, the material spraying pipe has a telescopic function, and the driving device is arranged at the tail end of the walking module and drives the material spraying pipe to move back and forth in a telescopic mode. By means of the mechanism, the problems that in the prior art, a coal conveying belt is used for feeding bed materials to a bed material starting bin, then the bed materials of the bed material starting bin are fed into a hearth through a coal feeder, an air and smoke system needs to be started in the feeding process, the bed materials need to be evenly distributed in the bed, and huge energy waste is caused are solved.

Description

Technical Field

[0001] The invention relates to the technical field of boiler bed material adding, and in particular to a circulating fluidized bed boiler bed material adding device. Background Art

[0002] Bed material, also called bottom material, is an essential substance for circulating fluidized bed boiler bed material to provide the basis for ignition startup and promote the stability of the combustion process. Generally, the more common ones are slag or river sand discharged after the fluidized bed boiler is burned. The bed material is placed in the furnace. It is a necessary process before feeding coal and plays a key role in the change and adjustment of boiler load.

[0003] Due to bed material contamination or the first start-up, the circulating fluidized bed boiler needs to be filled with bed material. The main filling methods are manual filling, bucket elevator filling to the return valve or special bed material bin, etc. The existing bed loading method is to transport the bed material to the coal yard and use the coal conveyor belt to load the bed material to the starting bed material bin. Connect the starting bed material bin to the inlet of the coal feeder, then start the coal feeder and use the coal feeder to feed the bed material into the furnace. At the same time, start the air and smoke system during the feeding period to evenly distribute the bed material in the bed. This method requires starting the air and smoke system to level the bed material during the filling process, resulting in huge energy waste. Summary of the invention

[0004] The present invention provides a circulating fluidized bed boiler bed material adding device, which solves the problem of using a coal conveyor belt to transport bed material to a starting bed material bin, and then using a coal feeder to feed the bed material in the starting bed material bin into the furnace, and also solving the problem of huge energy waste caused by starting a wind and smoke system during the feeding process to evenly distribute the bed material in the bed.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A circulating fluidized bed boiler bed material adding device comprises a furnace, a material spraying device and a powder receiving tank car, a manhole is provided at one end of the furnace, the front end of the material spraying device is inserted into the manhole and penetrates into the furnace, a bed material input pipe is provided at the rear end of the material spraying device, and the bed material inlet end of the bed material input pipe is connected to the powder outlet of the powder receiving tank car;

[0007] The spraying device includes a spraying head, a spraying pipe, a walking module and a driving device. The spraying head is provided with multiple nozzles. The spraying head is arranged at the front end of the spraying pipe, and the tail end of the spraying pipe is arranged in the walking module. The spraying pipe has a telescopic function. The driving device is arranged at the tail end of the walking module, and the driving device drives the spraying pipe to telescope and move forward and backward.

[0008] The beneficial effect of adopting the above further scheme is that the tail end of the spraying device is connected to the powder outlet of the powder receiving tanker through the bed material input pipe, so that the bed material in the powder receiving tanker can be directly transported to the spraying pipe of the spraying device through the bed material input pipe, and then sprayed into the furnace through multiple nozzles opened on the spraying head. Automated bed material filling is achieved. The front end of the spraying device is extended into the interior of the furnace, and the tail end is arranged in the walking module. The spraying pipe is driven to extend and retract by driving the walking module, so that the front end of the spraying pipe is telescopically moved back and forth in the furnace. Since the motor rotates at a uniform speed, the bed material is laid flat during the filling process, avoiding the need to start the wind and smoke system to level the material, thereby reducing energy consumption. At the same time, the device is easy to assemble and can be used multiple times.

[0009] Furthermore, the spray head is a rake-type spray head, on which a plurality of spray ports are provided, and the openings of the plurality of spray ports are downward.

[0010] The beneficial effect of adopting the above further scheme is that the spray head is set as a rake-type spray head, and a plurality of nozzles opening downward are opened on the rake-type spray head, so that the bed material in the spray pipe can be sprayed into the furnace through the plurality of nozzles, and the bed material is leveled during the filling process, avoiding starting the wind and smoke system for leveling the material, and reducing energy consumption. At the same time, the device is easy to assemble and can be used multiple times.

[0011] Furthermore, a protective device is arranged outside the rake-type spraying head.

[0012] The beneficial effect of adopting the above further solution is that a protective device is arranged outside the rake-type spraying head to prevent the bed material from being sprayed over a too large range.

[0013] Furthermore, the tail end of the spray pipe is a multi-section assembly structure, and two adjacent sections are connected by a locking device.

[0014] The beneficial effect of adopting the above further scheme is that two adjacent sections of the spray pipe are connected by a locking device, and multiple sections are assembled. The splicing positions can be reasonably arranged according to the needs of the site, and can adapt to various sites.

[0015] Furthermore, the front end of the spray pipe is a multi-section assembled sleeve type, and the retracted spray pipe is arranged in the walking module.

[0016] The beneficial effect of adopting the above further solution is that, through the sleeve-type installation, each section of the front end of the spray pipe can be retracted into the adjacent rear section, so that the front end of the spray pipe is finally retracted into the rear end of the spray pipe, so that the spray pipe can be retracted as a whole and arranged in the walking module.

[0017] Furthermore, the walking module is arranged outside the manhole, and a supporting device is also arranged near the manhole on the walking module, and the supporting device is fixedly arranged at the bottom of the spraying pipe.

[0018] The beneficial effect of adopting the above further scheme is that the supporting device is arranged at the bottom of the injection pipe and close to the manhole, so that the supporting device can support the injection device and prevent the injection pipe from tilting, thereby affecting the filling of the furnace bed material.

[0019] Furthermore, the walking module includes a transmission shaft, a rotating transmission disk, a first limit block, a second limit block and a positioning block. The first limit block is arranged at the front end of the transmission shaft, and the second limit block is arranged at the rear end of the transmission shaft. The rotating transmission disk is rotatably arranged at the front end of the transmission shaft and is located on the outside of the first limit block. The positioning block is fixedly arranged at the front end of the spray pipe, and the positioning block is rotatably connected to the top of the rotating transmission disk. The surface of the transmission shaft has threads.

[0020] The beneficial effect of adopting the above further scheme is that the drive shaft is driven forward or backward by the driving device, so that the drive shaft is rotated forward or backward, thereby driving the rotating transmission disk to move forward or backward together. Because the rotating transmission disk is fixedly arranged at the front end of the spray pipe through the positioning block, when the drive shaft is rotated forward or backward, the spray pipe is extended or contracted at the same time. The front end of the spray pipe is telescopically moved in the furnace, so that the bed material is laid flat. At the same time, the drive shaft is limited by the first limit block and the second limit block during the transmission process, so that the drive shaft is transmitted within a limited length range.

[0021] Furthermore, the driving device includes a driving motor, a gear disk, a first contact, a second contact and a controller. The output end of the driving motor is fixedly provided with a gear disk, the gear disk is meshedly connected to a thread on the surface of the transmission shaft, the first contact is provided on a first limit block, the second contact is provided on a second limit block, the controller is electrically connected to the driving motor, and the first contact and the second contact signals are transmitted to the controller.

[0022] The beneficial effect of adopting the above further scheme is that the output end of the driving motor rotates to drive the gear disc to move back and forth along the length direction of the transmission shaft through the meshing of the gear disc with the thread on the surface of the transmission shaft. The transmission shaft drives the spray pipe to move telescopically in the furnace, so that the bed material is laid flat. The limit blocks on both sides are respectively provided with a first contact and a second contact, which are transmitted to the controller through the contact signal, and the controller controls the forward and reverse rotation of the motor to realize the walking module entering or exiting the furnace to realize the bed material filling.

[0023] Furthermore, a manhole is opened on one side of the furnace, and the length of the front end of the injection pipe is the internal length of the furnace, or manholes are opened on both sides of the furnace, and the length of the front end of the injection pipe is half of the internal length of the furnace.

[0024] The beneficial effect of adopting the above further solution is that, according to the situation of opening a manhole in the furnace on site, it can be selected whether the spraying device is laid in one direction or in two directions, thereby selecting a spraying pipe of corresponding length.

[0025] Further, the length of the transmission shaft is the inner length of the furnace, or the length of the transmission shaft is one half of the inner length of the furnace.

[0026] The beneficial effect of adopting the above further solution is that, according to the situation of opening a manhole in the furnace on site, it can be selected whether the spraying device is laid in one direction or in two directions, thereby selecting a transmission shaft of corresponding length. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a circulating fluidized bed boiler bed material adding device of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the spraying device of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the spraying device of the present invention when it is extended;

[0030] Figure 4 It is a schematic diagram of the structure of the spraying device of the present invention after contraction;

[0031] Figure 5 This is a schematic diagram of the structure of the furnace of the present invention with spraying devices on both sides;

[0032] Figure 6 This is a top view of the furnace of the present invention with spraying devices on both sides.

[0033] In the accompanying drawings, the list of components represented by each number is as follows: 1. Furnace; 11. Manhole; 2. Spraying device; 21. Spraying head; 211. Nozzle; 22. Spraying pipe; 221. Locking device; 222. Supporting device; 23. Traveling module; 231. Transmission shaft; 232. Rotating transmission disk; 233. First limit block; 234. Second limit block; 235. Positioning block; 24. Driving device; 241. Driving motor; 242. Gear disk; 243. Controller; 3. Powder receiving tank car; 4. Bed material input pipe. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] Example 1

[0036] like Figure 1-4As shown, a circulating fluidized bed boiler bed material adding device comprises a furnace 1, a material spraying device 2 and a powder receiving tanker 3. A manhole 11 is provided at one end of the furnace 1. The front end of the material spraying device 2 is inserted into the manhole 11 and penetrates into the furnace 1. A bed material input pipe 4 is provided at the rear end of the material spraying device 2. The bed material inlet end of the bed material input pipe 4 is connected to the powder outlet of the powder receiving tanker 3.

[0037] The spraying device 2 includes a spraying head 21, a spraying pipe 22, a walking module 23 and a driving device 24. The spraying head 21 is provided with a plurality of nozzles 211. The spraying head 21 is arranged at the front end of the spraying pipe 22. The rear end of the spraying pipe 22 is arranged in the walking module 23. The spraying pipe 22 has a telescopic function. The driving device 24 is arranged at the rear end of the walking module 23. The driving device 24 drives the spraying pipe 22 to telescope forward and backward.

[0038] Specifically, the tail end of the spraying device 2 is connected to the powder outlet of the powder receiving tanker 3 through the bed material input pipe 4, and the bed material in the powder receiving tanker 3 is directly transported to the spraying pipe 22 of the spraying device 2 through the bed material input pipe 4, and then sprayed into the furnace 1 through multiple nozzles 211 opened on the spraying head 21. The bed material in the furnace 1 is then filled and leveled by the forward and backward telescopic movement of the spraying pipe 22.

[0039] like Figure 1-4 As shown, the spray head 21 is a rake-type spray head 21 , and a plurality of spray ports 211 are provided on the rake-type spray head 21 , and the openings of the plurality of spray ports 211 are downward.

[0040] Specifically, the bed material can be sprayed into the furnace 1 through multiple nozzles 211 opened by the rake-type spray head 21, and the bed material is leveled during the filling process. In this embodiment, the rake-type spray head 21 is a horizontal rake-type spray head 21, and multiple nozzles 211 are opened on the horizontal rake-type spray head 21 at a certain interval. The horizontal rake-type spray head 21 can be selected according to the width of the furnace 1.

[0041] like Figure 1-4 As shown, a protective device is also provided on the outside of the rake type spray head 21.

[0042] Specifically, a protective device is provided outside the rake-type spraying head 21 to prevent the bed material from being sprayed over a too large range.

[0043] like Figure 1-4 As shown, the tail end of the spray pipe 22 is a multi-section assembly structure, and two adjacent sections are connected by a locking device 221.

[0044] Specifically, two adjacent sections of the spray pipe 22 are connected by a locking device 221, and multiple sections are assembled, and the splicing positions can be reasonably arranged according to the needs of the site, which can adapt to various sites. In this embodiment, the locking device 221 is a clamp pipe section, and the multiple sections of the tail end of the spray pipe 22 are assembled by the clamp pipe section.

[0045] like Figure 1-4 As shown, the front end of the spray pipe 22 is a multi-section assembled sleeve type, and the contracted spray pipe 22 is arranged in the walking module 23.

[0046] Specifically, each section of the front end of the spray pipe 22 can be retracted into the adjacent rear section. The front end of the spray pipe 22 is finally retracted into the rear end of the spray pipe 22. The spray pipe 22 can be retracted as a whole and arranged in the walking module 23.

[0047] like Figure 1-4 As shown, the walking module 23 is arranged outside the manhole 11 , and a supporting device 222 is further arranged near the manhole 11 of the walking module 23 , and the supporting device 222 is fixedly arranged at the bottom of the spraying pipe 22 .

[0048] Specifically, the support device 222 is arranged at the bottom of the injection pipe 22 and close to the manhole 11, so that the support device 222 can support the injection device 2 to prevent the injection pipe 22 from tilting, thereby affecting the filling of bed material into the furnace 1.

[0049] like Figure 1-4 As shown, the walking module 23 includes a transmission shaft 231, a rotating transmission disk 232, a first limit block 233, a second limit block 234 and a positioning block 235. The front end of the transmission shaft 231 is provided with a first limit block 233, and the rear end of the transmission shaft 231 is provided with a second limit block 234. The rotating transmission disk 232 is rotatably set at the front end of the transmission shaft 231 and is located on the outside of the first limit block 233. The positioning block 235 is fixedly set at the front end of the spray pipe 22, and the positioning block 235 is rotatably connected to the top of the rotating transmission disk 232. The surface of the transmission shaft 231 has threads.

[0050] Specifically, the driving device 24 drives the transmission shaft 231 to move forward or backward between the first limit block 233 and the second limit block 234, and the transmission shaft 231 drives the rotating transmission disk 232 to move forward or backward together. Since the rotating transmission disk 232 is fixedly arranged at the front end of the spraying pipe 22 through the positioning block 235, when the transmission shaft 231 moves forward or backward, the spraying pipe 22 simultaneously extends or contracts. Therefore, the front end of the spraying pipe 22 moves and retracts in the furnace 1 to lay the bed material flat.

[0051] like Figure 1-4As shown, the driving device 24 includes a driving motor 241, a gear disc 242, a first contact, a second contact and a controller 243. The output end of the driving motor 241 is fixedly provided with a gear disc 242, and the gear disc 242 is meshingly connected to the thread on the surface of the transmission shaft 231. The first contact is arranged on the first limit block 233, and the second contact is arranged on the second limit block 234. The controller 243 is electrically connected to the driving motor 241, and the first contact and the second contact signals are transmitted to the controller 243.

[0052] Specifically, the output end of the driving motor 241 rotates the driving toothed disc 242 to move along the length direction of the transmission shaft 231. When the driving toothed disc 242 moves to the first limit block 233 or the second limit block 234, the first contact or the second contact transmits a signal to the controller 243, and the controller 243 controls the driving motor 241 to rotate forward and reversely. The forward and reverse rotation of the driving motor 241 drives the toothed disc 242 to reciprocate on the transmission shaft 231. Because the toothed disc 242 and the transmission shaft 231 are threadedly connected and driven, when the transmission shaft 231 rotates, the toothed disc 242 will move along the threaded rotation direction of the transmission shaft 231. When the thread of the transmission shaft 231 rotates in the reverse direction, the toothed disc 242 will move in the reverse direction along the threaded rotation direction of the transmission shaft 231 at the same time. Therefore, the toothed disc 242 drives the driving motor 241 to reciprocate along the rotation direction of the transmission shaft 231, so that the transmission shaft 231 drives the spraying pipe 22 to move telescopically in the furnace 1, so as to lay the bed material flat. In this embodiment, the specific positions of the first contact and the second contact are not marked in the figure, and the positions of the first contact and the second contact can also be set at the positions of the two ends of the transmission shaft 231. In this embodiment, it is only necessary for the first contact and the second contact to sense the position of the toothed disc 242 moving on the transmission shaft 231.

[0053] In this embodiment, the first contact or the second contact transmits a signal to the controller 243. The technology of the controller 243 controlling the forward and reverse rotation of the driving motor 241 is prior art and will not be described in detail here.

[0054] like Figure 1-4 As shown, a manhole 11 is opened on one side of the furnace 1, and the length of the front end of the injection pipe 22 is the internal length of the furnace 1, or a manhole 11 is opened on both sides of the furnace 1, and the length of the front end of the injection pipe 22 is half of the internal length of the furnace 1.

[0055] Specifically, the material spraying device 2 can be selected to be unidirectionally laid or bidirectionally laid according to the situation of the manhole 11 in the furnace 1, so as to select the corresponding length of the material spraying pipe 22. In this embodiment, the furnace 1 has a manhole 11 on one side, and the length of the front end of the material spraying pipe 22 is the internal length of the furnace 1.

[0056] like Figure 1-4As shown, the length of the transmission shaft 231 is the inner length of the furnace 1 , or the length of the transmission shaft 231 is one half of the inner length of the furnace 1 .

[0057] Specifically, the material spraying device 2 can be selected to be unidirectionally laid or bidirectionally laid according to the situation of the manhole 11 in the furnace 1, so as to select the corresponding length of the transmission shaft 231. In this embodiment, the furnace 1 has a manhole 11 on one side, and the length of the transmission shaft 231 is the internal length of the furnace 1.

[0058] The beneficial effects of this embodiment are as follows: the tail end of the spraying device 2 is connected to the powder outlet of the powder receiving tanker 3 through the bed material input pipe 4, so that the bed material in the powder receiving tanker 3 can be directly transported to the spraying pipe 22 of the spraying device 2 through the bed material input pipe 4, and then sprayed into the furnace 1 through the multiple nozzles 211 opened on the spraying head 21. Automated bed material filling is achieved. The front end of the spraying device 2 is extended into the interior of the furnace 1, and the tail end is arranged in the walking module 23. The spraying pipe 22 is driven to extend and retract by driving the walking module 23, so that the front end of the spraying pipe 22 is telescopically moved forward and backward in the furnace 1, and the bed material is leveled during the filling process to avoid starting the wind and smoke system for leveling the material, thereby reducing energy consumption. At the same time, the device is easy to assemble and can be used multiple times.

[0059] The working process of this embodiment is as follows: after the tail end of the spraying device 2 is connected to the powder outlet of the powder receiving tanker 3 through the bed material input pipe 4, the bed material in the powder receiving tanker 3 is directly transported to the spraying pipe 22 of the spraying device 2 through the bed material input pipe 4 at the manhole 11 opened on one side of the furnace 1, and then sprayed into the furnace 1 through multiple nozzles 211 opened on the spraying head 21. The bed material in the furnace 1 is then filled and leveled by the forward and backward telescopic movement of the spraying pipe 22.

[0060] Example 2

[0061] Based on Example 1, the difference from Example 1 is that:

[0062] like Figure 1-6 As shown, a manhole 11 is opened on one side of the furnace 1, and the length of the front end of the injection pipe 22 is the internal length of the furnace 1, or a manhole 11 is opened on both sides of the furnace 1, and the length of the front end of the injection pipe 22 is half of the internal length of the furnace 1.

[0063] Specifically, the material spraying device 2 can be selected to be unidirectionally laid or bidirectionally laid according to the situation of the manhole 11 in the furnace 1, so as to select the corresponding length of the material spraying pipe 22. In this embodiment, the furnace 1 has manholes 11 on both sides, and the length of the front end of the material spraying pipe 22 is half of the internal length of the furnace 1.

[0064] like Figure 1-6As shown, the length of the transmission shaft 231 is the inner length of the furnace 1 , or the length of the transmission shaft 231 is one half of the inner length of the furnace 1 .

[0065] Specifically, the material spraying device 2 can be selected to be unidirectionally laid or bidirectionally laid according to the situation of the manhole 11 in the furnace 1, so as to select the corresponding length of the transmission shaft 231. In this embodiment, the furnace 1 has manholes 11 on both sides, and the length of the front end of the material spraying pipe 22 is half of the internal length of the furnace 1.

[0066] The beneficial effects of this embodiment are as follows: the tail end of the spraying device 2 is connected to the powder outlet of the powder receiving tanker 3 through the bed material input pipe 4, so that the bed material in the powder receiving tanker 3 can be directly transported to the spraying pipe 22 of the spraying device 2 through the bed material input pipe 4, and then sprayed into the furnace 1 through the multiple nozzles 211 opened on the spraying head 21. Automated bed material filling is achieved. The front end of the spraying device 2 is extended into the interior of the furnace 1, and the tail end is arranged in the walking module 23. The spraying pipe 22 is driven to extend and retract by driving the walking module 23, so that the front end of the spraying pipe 22 is telescopically moved forward and backward in the furnace 1, and the bed material is leveled during the filling process to avoid starting the wind and smoke system for leveling the material, thereby reducing energy consumption. At the same time, the device is easy to assemble and can be used multiple times.

[0067] The working process of this embodiment is as follows: after the tail end of the spraying device 2 is connected to the powder outlet of the powder receiving tanker 3 through the bed material input pipe 4, the bed material in the powder receiving tanker 3 is directly transported to the spraying pipe 22 of the spraying device 2 through the bed material input pipe 4 at the manholes 11 opened on both sides of the furnace 1, the rake-type spraying heads 21 are arranged oppositely, and then, the bed material is sprayed into the furnace 1 through the multiple nozzles 211 opened on the spraying head 21. The bed material in the furnace 1 is then filled and leveled by the forward and backward telescopic movement of the spraying pipe 22.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0069] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0073] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A circulating fluidized bed boiler bed material adding device, characterized in that: The invention comprises a furnace (1), a material spraying device (2) and a powder receiving tanker (3), wherein a manhole (11) is provided at one end of the furnace (1), the front end of the material spraying device (2) is inserted into the manhole (11) and penetrates into the interior of the furnace (1), a bed material input pipe (4) is provided at the rear end of the material spraying device (2), and the bed material inlet end of the bed material input pipe (4) is connected to the powder outlet of the powder receiving tanker (3); The spraying device (2) comprises a spraying head (21), a spraying pipe (22), a walking module (23) and a driving device (24); the spraying head (21) is provided with a plurality of spraying ports (211); the spraying head (21) is arranged at the front end of the spraying pipe (22); the rear end of the spraying pipe (22) is arranged in the walking module (23); the spraying pipe (22) has a telescopic function; the driving device (24) is arranged at the rear end of the walking module (23); and the driving device (24) drives the spraying pipe (22) to telescope forward and backward.

2. A circulating fluidized bed boiler bed material adding device according to claim 1, characterized in that: The spray head (21) is a rake-type spray head (21), and a plurality of spray ports (211) are provided on the rake-type spray head (21), and the openings of the plurality of spray ports (211) are downward.

3. A circulating fluidized bed boiler bed material adding device according to claim 2, characterized in that: The outside of the rake-type spray head (21) is also provided with a protective device.

4. The circulating fluidized bed boiler bed material adding device according to claim 1, characterized in that: The tail end of the spray pipe (22) is a multi-section assembly structure, and two adjacent sections are connected by a locking device (221).

5. A circulating fluidized bed boiler bed material adding device according to claim 4, characterized in that: The front end of the spray pipe (22) is a multi-section assembled sleeve type, and the spray pipe (22) after shrinkage is arranged in the walking module (23).

6. The circulating fluidized bed boiler bed material adding device according to claim 1, characterized in that: The walking module (23) is arranged outside the manhole (11), and a supporting device (222) is also arranged near the manhole (11) of the walking module (23), and the supporting device (222) is fixedly arranged at the bottom of the spraying pipe (22).

7. The circulating fluidized bed boiler bed material adding device according to claim 1, characterized in that: The walking module (23) comprises a transmission shaft (231), a rotating transmission disk (232), a first limit block (233), a second limit block (234) and a positioning block (235); the first limit block (233) is arranged at the front end of the transmission shaft (231); the second limit block (234) is arranged at the rear end of the transmission shaft (231); the rotating transmission disk (232) is rotatably arranged at the front end of the transmission shaft (231) and is located outside the first limit block (233); the positioning block (235) is fixedly arranged at the front end of the spray pipe (22) and is rotatably connected to the top of the rotating transmission disk (232); and the surface of the transmission shaft (231) has threads.

8. A circulating fluidized bed boiler bed material adding device according to claim 7, characterized in that: The driving device (24) comprises a driving motor (241), a toothed disc (242), a first contact, a second contact and a controller (243); the toothed disc (242) is fixedly arranged at the output end of the driving motor (241); the toothed disc (242) is meshingly connected to a thread on the surface of the transmission shaft (231); the first contact is arranged on the first limit block (233); the second contact is arranged on the second limit block (234); the controller (243) is electrically connected to the driving motor (241); and signals of the first contact and the second contact are transmitted to the controller (243).

9. The circulating fluidized bed boiler bed material adding device according to claim 7, characterized in that: A manhole (11) is provided on one side of the furnace (1), and the length of the front end of the injection pipe (22) is equal to the internal length of the furnace (1); or manholes (11) are provided on both sides of the furnace (1), and the length of the front end of the injection pipe (22) is half of the internal length of the furnace (1).

10. A circulating fluidized bed boiler bed material adding device according to claim 9, characterized in that: The length of the transmission shaft (231) is the same as the internal length of the furnace (1), or the length of the transmission shaft (231) is one half of the internal length of the furnace (1).

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