An under-bed igniter for a circulating fluidized bed co-firing multi-source waste

Abstract

This invention discloses an under-bed igniter for a circulating fluidized bed co-firing system for multi-source waste, comprising: an air supply mechanism including an air chamber, an air supply duct connected to the air chamber, and an air supply hole at the end of the air chamber; a central tube located inside the air chamber with its end extending to the outside of the air chamber; and an oil gun located inside the central tube, the oil gun having an oil delivery channel and a dispersion oil channel connected to the oil delivery channel; the air supply holes are distributed in a ring around the oil gun, and the oil inside the oil delivery channel can be delivered away from the axial direction through the dispersion oil channel. By setting the oil delivery channel and the dispersion oil channel, the oil inside the oil delivery channel can be delivered away from the axial direction through the dispersion oil channel. Therefore, the airflow delivered inside the air supply hole is annular, and the oil sprayed from the dispersion oil channel collides with the annular airflow, thereby improving the atomization effect of the oil.

Description

Technical Field

[0001] This invention relates to the technical field of fluidized bed boilers, and more particularly to an under-bed igniter for a circulating fluidized bed that co-fires multi-source waste. Background Technology

[0002] Circulating fluidized bed (CFB) reactors are highly efficient reactors and combustion devices widely used in chemical, energy, and environmental protection fields. To reduce the operating costs of CFB boiler units, some power plants have implemented co-firing of multi-source waste (including sludge, RDF fuel rods, and industrial solid waste). In a CFB, the solid particle bed is fluidized by gas, forming a fluid-like state that allows the solid particles to flow like a fluid. Under-bed igniters are typically used to ignite the fuel in the CFB system to initiate the combustion process.

[0003] Existing under-bed igniters have poor oil atomization when injecting combustion-supporting oil, which can lead to difficulty in ignition. Summary of the Invention

[0004] In view of the problems existing in the under-bed igniters of the current circulating fluidized bed, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide an under-bed igniter for a circulating fluidized bed for co-firing multi-source waste.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an under-bed igniter for a circulating fluidized bed for co-firing multi-source waste, comprising,

[0007] An air supply mechanism includes an air chamber, an air supply duct connected to the air chamber, and an air supply hole located at the end of the air chamber.

[0008] A central tube, which is located inside the wind chamber and extends to the outside of the wind chamber at its end; and,

[0009] An oil gun is located inside the central tube. The oil gun has an oil delivery channel and a dispersion oil channel connected to the oil delivery channel.

[0010] The air supply holes are distributed in a ring around the oil gun, and the oil inside the oil delivery channel can be delivered away from the axial direction through the dispersion oil channel.

[0011] As a preferred embodiment of the under-bed igniter of the circulating fluidized bed of the present invention, the dispersion oil channel includes a connecting section connected to the oil delivery channel, and a diffusion section connected to the connecting section and extending away from the axis of the oil delivery channel.

[0012] As a preferred embodiment of the under-bed igniter of the circulating fluidized bed according to the present invention, it further includes a push-pull mechanism, which includes a power component and a connecting rod connecting the power component and the oil gun.

[0013] As a preferred embodiment of the under-bed igniter of the circulating fluidized bed of the present invention, the oil gun is further provided with a leak-proof head at its end. One end of the leak-proof head is a blocking end, which can block the connection between the oil delivery channel and the dispersion oil channel. The other end of the leak-proof head is a fitting end, which can fit against the end of the oil gun.

[0014] The connecting rod is connected to the plugging end of the leak-proof head;

[0015] The outer side of the connecting rod is provided with a push plate that can push the oil gun;

[0016] A limit ring is fixed to the outer side of the oil gun, and a fixed ring is fixed to the inner side of the central tube.

[0017] As a preferred embodiment of the under-bed igniter of the circulating fluidized bed of the present invention, the anti-leak head is further provided with an anti-blocking mechanism.

[0018] The anti-blocking mechanism includes an anti-blocking strip, which can enter the inner side of the dispersion oil passage.

[0019] As a preferred embodiment of the under-bed igniter of the circulating fluidized bed of the present invention, the anti-clogging strip includes a fitting section parallel to the dispersion oil passage, a connecting section connected to the fitting section, and a sliding column installed on the connecting section and connected to the anti-leakage head.

[0020] The anti-clogging mechanism also includes an adjusting ring rotatably mounted on the leak-proof head, and an elastic rotating ring connected to the adjusting ring;

[0021] The leak-proof head has an annular groove, and the adjusting ring is rotatably installed on the inner side of the annular groove;

[0022] When the adjusting ring rotates, the position of the anti-blocking strip can be adjusted via the sliding column.

[0023] As a preferred embodiment of the under-bed igniter of the circulating fluidized bed of the present invention, the adjusting ring is provided with a guide groove, the sliding column passes through the guide groove, the anti-leak head is provided with a sliding groove parallel to the axial direction, and the sliding column extends to the inner side of the sliding groove.

[0024] The elastic rotating ring includes a positioning protrusion fixed to the leak-proof head, an arc column passing through the positioning protrusion, a first elastic element sleeved on the outside of the arc column, and a connecting block connecting the arc column and the adjusting ring.

[0025] As a preferred embodiment of the under-bed igniter for the circulating fluidized bed described in this invention, it further includes:

[0026] A shielding mechanism includes an inner ring rotatably connected to the outside of a central tube, an inner connector disposed on the inner ring, an outer ring connected to the inner ring via the inner connector, and a shielding plate disposed on the outer ring.

[0027] An angle deflection mechanism is mounted on the central shaft tube and is connected to the inner ring, which can drive the inner ring to rotate.

[0028] The pressing mechanism, which is mounted on the oil gun, can drive the angle deflection mechanism to rotate.

[0029] As a preferred embodiment of the under-bed igniter of the circulating fluidized bed of the present invention, the angle deflection mechanism includes a rotating body rotatably mounted on the central shaft tube, a force-bearing protrusion fixed on the rotating body, and a synchronization component connecting the rotating body and the inner ring.

[0030] The pressing mechanism includes a fixed body connected to the oil gun, and a pressing column mounted on the fixed body.

[0031] As a preferred embodiment of the under-bed igniter of the circulating fluidized bed of the present invention, the angle deflection mechanism includes a concentric column fixed to the end of the rotating body, a blocking block fixed to the outside of the central shaft tube, and a second elastic element sleeved on the outside of the concentric column and located between the blocking block and the rotating body.

[0032] The beneficial effects of the present invention are as follows: by setting up an oil delivery channel and a dispersion oil channel, the oil inside the oil delivery channel can be sent out in a direction away from the axial direction through the dispersion oil channel. Therefore, the airflow sent out inside the air delivery hole is annular, and the oil sprayed in the dispersion oil channel will collide with the annular airflow, thereby improving the atomization effect of the oil. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0034] Figure 1 This is a schematic diagram of the overall structure of the under-bed igniter of the circulating fluidized bed of the present invention.

[0035] Figure 2 This is a schematic diagram of the internal structure of the under-bed igniter of the circulating fluidized bed of the present invention.

[0036] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle.

[0037] Figure 4 This is a schematic diagram of the oil gun in the retracted state in this invention.

[0038] Figure 5 This is a schematic diagram of the oil gun in the extended state in this invention.

[0039] Figure 6 This is a schematic diagram of the anti-leakage head structure in this invention.

[0040] Figure 7 This is an exploded view of the anti-leakage head and anti-blocking mechanism structure in this invention.

[0041] Figure 8 This is a schematic diagram of the air supply hole structure in this invention.

[0042] Figure 9 This is a schematic diagram of the shielding mechanism in this invention.

[0043] Figure 10 This is a schematic diagram of the angle deflection mechanism and pressing mechanism described in this invention. Detailed Implementation

[0044] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0046] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0047] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0048] Example 1

[0049] Reference Figures 1 to 3An under-bed igniter for co-firing multi-source waste in a circulating fluidized bed is provided, including an air supply mechanism 100, comprising an air chamber 101, an air supply duct 102 connected to the air chamber 101, and an air supply hole 103 located at the end of the air chamber 101; the air supply duct 102 is connected to an external air supply system, and air is supplied to the interior of the air chamber 101 through the air supply duct 102 and discharged through the air supply hole 103. Because it is an under-bed igniter, it is installed as a whole at the bottom of the circulating fluidized bed boiler, and the airflow supplied from the air supply hole 103 enters its interior from the bottom of the circulating fluidized bed boiler.

[0050] The under-bed igniter of the circulating fluidized bed includes a central tube 200, which is located inside the air chamber 101 and extends to the outside of the air chamber 101. In this embodiment, the air chamber 101 is a cylindrical structure, and the central tube 200 is installed at the center line of the air chamber 101.

[0051] The under-bed igniter of the circulating fluidized bed includes an oil gun 300, which is located inside the central tube 200. The oil gun 300 has an oil delivery channel 301 and a dispersion oil channel 302 connected to the oil delivery channel 301. The oil gun 300 is connected to an external oil pipe, which delivers oil into the oil delivery channel 301. The oil is dispersed and sprayed out in a funnel shape through the dispersion oil channel 302.

[0052] The air supply holes 103 are distributed in a ring around the oil gun 300. The oil inside the oil delivery channel 301 can be sent out in a direction away from the axial direction through the dispersion oil channel 302. Therefore, the airflow sent out inside the air supply holes 103 is ring-shaped. The oil sprayed by the dispersion oil channel 302 will collide with the ring-shaped airflow, thereby improving the atomization effect of the oil.

[0053] Therefore, there are multiple dispersed oil channels 302, which are distributed in a ring around the central axis of the oil gun 300.

[0054] The ignition device can be manual or mechanical. It can ignite the atomized oil at the outlet of the oil gun 300's dispersion channel 302 to achieve the ignition effect.

[0055] Specifically, the dispersion oil channel 302 includes a connecting section 302a connected to the oil delivery channel 301, and a diffusion section 302b connected to the connecting section 302a and extending away from the axis of the oil delivery channel 301.

[0056] Through the connecting section 302a, the oil inside the oil transport channel 301 can enter the inner side of the connecting section 302a, and then enter the inner side of the diffusion section 302b through the connecting section 302a, and finally be discharged through the diffusion section 302b.

[0057] Example 2

[0058] Reference Figure 2The difference between this embodiment and the first embodiment is that the under-bed igniter of the circulating fluidized bed also includes a push-pull mechanism 400, which includes a power component 401 and a connecting rod 402 connecting the power component 401 and the oil gun 300.

[0059] After ignition, the power component 401 can pull the oil gun 300 back to the inside of the central tube 200, which can protect the oil gun 300. The power component 401 can be an electrically or hydraulically driven telescopic mechanism. When ignition is required again, the power component 401 pushes the connecting rod 402, which can push the oil gun 300 so that the end of the oil gun 300 extends to the outside of the central tube 200 for oil spraying.

[0060] The rest of the structure is the same as in Example 1.

[0061] Example 3

[0062] Reference Figures 2 to 5 This embodiment differs from the previous embodiments in that the end of the oil gun 300 is also provided with a leak-proof head 500. The purpose of the leak-proof head 500 is to block the connection between the oil delivery channel 301 and the oil dispersion channel 302 when the oil gun 300 is retracted, thus preventing oil leakage. One end of the leak-proof head 500 is a blocking end 501, which can block the connection between the oil delivery channel 301 and the oil dispersion channel 302. The other end of the leak-proof head 500 is a fitting end 502, which can fit against the end of the oil gun 300. In this embodiment, the end of the oil gun 300 is a flared section. 304. The oil dispersion channel 302 is opened along the inner wall of the oil gun 300. When the anti-leak head 500 moves into the oil gun 300, the contact end 502 can abut against the flared part 304. The blocking end 501 is cylindrical and matches the inner diameter of the oil delivery channel 301. When the anti-leak head 500 moves into the oil gun 300, the blocking end 501 blocks the connection between the oil delivery channel 301 and the oil dispersion channel 302. When the anti-leak head 500 moves outward from the inner wall of the oil gun 300, the blocking end 501 no longer blocks the connection between the oil delivery channel 301 and the oil dispersion channel 302.

[0063] The connecting rod 402 is connected to the plugging end 501 of the leak-proof head 500; a push plate capable of pushing the oil gun 300 is provided on the outside of the connecting rod 402; a limit ring 301a is fixed on the outside of the oil gun 300, and a fixed ring 201 is fixed on the inside of the central tube 200.

[0064] In this embodiment, when the oil gun 300 completes the oil injection and ignition and needs to be retracted, the power component 401 operates, and the connecting rod 402 pulls the leak-proof head 500 to move to the outside of the central tube 200. At this time, the contact end 502 of the leak-proof head 500 can push the horn part 304, so that the oil gun 300 enters the inside of the central tube 200, and at the same time, the blocking end 501 blocks the connection between the oil delivery channel 301 and the dispersion oil channel 302.

[0065] When re-ignition is required, the power component 401 operates, and the connecting rod 402 pushes the leak-proof head 500 to move outward from the oil gun 300. At the beginning of the movement of the oil gun 300, the push plate and the oil gun 300 do not contact each other and therefore do not move with each other. Thus, the leak-proof head 500 first gains a stroke relative to the oil gun 300, so that the blocking end 501 no longer blocks the connection between the oil delivery channel 301 and the dispersion oil channel 302. Then, the push plate contacts the oil gun 300, pushing the oil gun 300 and the leak-proof head 500 outward from the inside of the central tube 200 simultaneously.

[0066] To prevent the entire oil gun 300 from moving due to friction when the anti-leak head 500 is first pushed, a structure to increase friction can be set between the limiting ring 301a and the central tube 200, or a spring can be added inside the central tube 200 to resist the oil gun 300.

[0067] The rest of the structure is the same as in Example 2.

[0068] Example 4

[0069] Reference Figure 4 and Figure 5 This embodiment differs from the previous embodiment in that: the anti-leakage head 500 is also provided with an anti-blocking mechanism 600; the anti-blocking mechanism 600 includes an anti-blocking strip 601, which can enter the inner side of the dispersion oil passage 302.

[0070] The number of anti-blocking strips 601 in the anti-blocking mechanism 600 is equivalent to the number of dispersing oil channels 302. When the anti-leak head 500 leaves the inside of the oil pipe, the anti-blocking strips 601 do not block the dispersing oil channels 302, allowing the oil to be sprayed out through the dispersing oil channels 302. When the anti-leak head 500 moves into the inside of the oil pipe, the anti-blocking strips 601 enter the dispersing oil channels 302, thereby preventing fuel dust inside the filter from entering the dispersing oil channels 302 and causing blockage.

[0071] The rest of the structure is the same as in Example 3.

[0072] Example 5

[0073] Reference Figures 4 to 7 The difference between this embodiment and the previous embodiment is that, in this embodiment, after the anti-leak head 500 is detached from the oil gun 300, the anti-blocking strip 601 is still partially located inside the dispersion oil channel 302, so that the diffusion section 302b of the dispersion oil channel 302 forms a relatively closed channel, thereby guiding the oil to be better dispersed in a funnel shape.

[0074] The anti-clogging strip 601 includes a fitting section 601a parallel to the dispersing oil passage 302, a connecting section 601b connected to the fitting section 601a, and a sliding column 601c installed on the connecting section 601b and connected to the anti-leak head 500. The anti-clogging mechanism 600 also includes an adjusting ring 602 rotatably installed on the anti-leak head 500, and an elastic rotating ring 603 connected to the adjusting ring 602. When the anti-leak head 500 moves to the outside of the oil gun 300, the elastic rotating ring 603 can drive the adjusting ring 602 to rotate, thereby adjusting the position of the anti-clogging strip 601 through the sliding column 601c. At this time, the adjusting ring 602 adjusts the position of the anti-clogging strip 601 so that the anti-clogging strip 601 moves towards the dispersing oil passage 302, so that after the anti-leak head 500 and the oil gun 300 are separated, part of the anti-clogging strip 601 still remains inside the dispersing oil passage 302. The leak-proof head 500 has an annular groove 503, and the adjusting ring 602 is rotatably installed inside the annular groove 503; when the adjusting ring 602 rotates, the position of the anti-blocking strip 601 can be adjusted by the sliding column 601c.

[0075] Specifically, the adjusting ring 602 has a guide groove 602a, the sliding post 601c passes through the guide groove 602a, the leak-proof head 500 has a sliding groove 504 parallel to the axial direction, and the sliding post 601c extends to the inner side of the sliding groove 504; the elastic rotating ring 603 includes a positioning protrusion 603a fixed on the leak-proof head 500, an arc post 603b passing through the positioning protrusion 603a, a first elastic member 603c sleeved on the outside of the arc post 603b, and a connecting block 603d connecting the arc post 603b and the adjusting ring 602.

[0076] The two ends of the guide groove 602a are the near end 602a-2 and the far end 602a-1, respectively. The near end 602a-2 is closer to the oil gun 300 than the far end 602a-1. The connecting block 603d in the elastic rotating ring 603 is connected to the adjusting ring 602, so the two can rotate synchronously.

[0077] The sliding column 601c is provided with an anti-deflection structure 601c-1 at the end inside the sliding groove 504. It fits against the groove wall of the sliding groove. When the anti-leak head 500 moves into the oil gun 300, before the anti-blocking strip 601 touches the inside of the dispersing oil passage 302, the sliding column 601c is located at the near end 602a-2. When the anti-leak head 500 and the anti-blocking strip 601 approach the oil gun 300 at the same time, the anti-blocking strip 601 will first touch the inside of the dispersing oil passage 302.

[0078] At this point, the anti-blocking strip 601 can no longer move, but the leak-proof head 500 continues to move into the oil gun 300. At this time, the sliding column 601c moves towards the end of the sliding groove 504 away from the oil gun 300. During the movement, the adjusting ring 602 is pushed to rotate forward through the inclined guide groove 602a. The rotation of the adjusting ring 602 drives the connecting block 603d to rotate forward. At this time, the connecting block 603d presses the first elastic element 603c. At the same time, the reaction force of the first elastic element 603c will act on the sliding column 601c, so that the anti-blocking strip 601 is pushed in the direction of the oil gun 300. The anti-blocking strip 601 is pressed against the inner side of the dispersion oil passage 302.

[0079] When the leak-proof head 500 moves outward from the oil gun 300, the first elastic element 603c pushes the connecting block 603d, which in turn drives the adjusting ring 602 to reverse. At this time, the anti-blocking strip 601 can move relative to the leak-proof head 500 towards the oil gun 300, so that part of the anti-blocking strip 601 is still located inside the dispersion oil passage 302.

[0080] The rest of the structure is the same as in Example 4.

[0081] Example 6

[0082] Reference Figures 8 to 10 This embodiment differs from the previous embodiments in that, in order to improve the atomization effect of the oil during ignition, the under-bed igniter of the circulating fluidized bed also includes a shielding mechanism 700, which includes an inner ring 701 rotatably connected to the outside of the central shaft tube 200, an inner connector 702 provided on the inner ring 701, an outer ring 703 connected to the inner ring 701 through the inner connector 702, and a shielding plate 704 provided on the outer ring 703. In this embodiment, the air supply hole 103 is a three-ringed annular hole. When ignition is performed, the shielding plate 704 can shield the two rings of air supply holes 103 with larger distribution radii, so that the air inside the air chamber 101 is concentrated and sent out through the air supply holes 103 with smaller distribution radii. At this time, the wind speed sent out through the air supply hole 103 will be significantly increased, and a better atomization effect will be obtained when the oil is impacted.

[0083] Angle deflection mechanism 800 is mounted on the central tube 200 and is connected to the inner ring 701, which can drive the inner ring 701 to rotate; pressing mechanism 900 is mounted on the oil gun 300 and can drive the angle deflection mechanism 800 to rotate.

[0084] When the oil gun 300 extends from the inside of the central tube 200, it will drive the pressing mechanism 900 to press the angle deflection mechanism 800. The angle deflection mechanism 800 can drive the inner ring 701 to rotate, which in turn drives the baffle plate 704 to block the two rings of air outlets 103 with a larger distribution radius.

[0085] Specifically, the angle deflection mechanism 800 includes a rotating body 801 rotatably mounted on the central tube 200, a force-bearing protrusion 802 fixed on the rotating body 801, and a synchronization component 803 connecting the rotating body 801 and the inner ring 701; the pressing mechanism 900 includes a fixed body 901 connected to the oil gun 300, and a pressing column 902 mounted on the fixed body 901.

[0086] The force-bearing protrusion 802 has an inclined surface, so when the pressing column 902 presses the force-bearing protrusion 802, the rotating body 801 can obtain a thrust to push it to rotate. In this process, the rotating body 801 drives the inner ring 701 to rotate through the synchronizing component 803, and then drives the baffle plate 704 to block the two rings of air supply holes 103 with a large distribution radius.

[0087] Furthermore, the angle deflection mechanism 800 includes a concentric column 804 fixed to the end of the rotating body 801, a blocking block 805 fixed to the outside of the central shaft tube 200, and a second elastic member 806 sleeved on the outside of the concentric column 804 and located between the blocking block 805 and the rotating body 801.

[0088] When the pressing column 902 presses the force-bearing protrusion 802, thereby pushing the rotating body 801 to rotate, it can drive the concentric column 804 to rotate, so that the rotating body 801 presses the second elastic element 806. After ignition, when the oil gun 300 moves to the inside of the central tube 200, the pressing column 902 no longer presses the force-bearing protrusion 802, and the second elastic element 806 pushes the rotating body 801 to reset, thereby driving the baffle plate 704 to reset and no longer blocking the air supply hole 103, thus delivering air evenly.

[0089] The rest of the structure is the same as in Example 5.

[0090] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0091] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0092] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0093] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An under-bed igniter for a circulating fluidized bed co-firing multi-source waste, characterized in that: include, The air supply mechanism (100) includes a wind chamber (101), an air supply duct (102) connected to the wind chamber (101), and an air supply hole (103) located at the end of the wind chamber (101). A central tube (200) is disposed inside the air duct (101) and its ends extend to the outside of the air duct (101); and, An oil gun (300) is located inside the central tube (200). The oil gun (300) has an oil delivery channel (301) and a dispersion oil channel (302) connected to the oil delivery channel (301). The air supply holes (103) are distributed in a ring around the oil gun (300), and the oil inside the oil delivery channel (301) can be delivered out in a direction away from the axial direction through the dispersion oil channel (302); It also includes a push-pull mechanism (400), which includes a power component (401) and a connecting rod (402) connecting the power component (401) and the oil gun (300). The oil gun (300) is also provided with a leak-proof head (500) at its end. One end of the leak-proof head (500) is a blocking end (501), which can block the connection between the oil delivery channel (301) and the dispersion oil channel (302). The other end of the leak-proof head (500) is a fitting end (502), which can fit into the end of the oil gun (300). The connecting rod (402) is connected to the plugging end (501) of the leak-proof head (500); The outer side of the connecting rod (402) is provided with a push plate that can push the oil gun (300); A limiting ring (303) is fixed on the outer side of the oil gun (300), and a fixed ring (201) is fixed on the inner side of the central tube (200). The leak-proof head (500) is also equipped with an anti-blocking mechanism (600). The anti-blocking mechanism (600) includes an anti-blocking strip (601) that can enter the inner side of the dispersion oil passage (302).

2. The under-bed igniter of the circulating fluidized bed as described in claim 1, characterized in that: The dispersion oil channel (302) includes a connecting section (302a) connected to the oil delivery channel (301) and a diffusion section (302b) connected to the connecting section (302a) and extending away from the axis of the oil delivery channel (301).

3. The under-bed igniter for a circulating fluidized bed as described in claim 2, characterized in that: The anti-clogging strip (601) includes a fitting section (601a) parallel to the dispersion oil passage (302), a connecting section (601b) connected to the fitting section (601a), and a sliding column (601c) installed on the connecting section (601b) and connected to the leak-proof head (500). The anti-clogging mechanism (600) further includes an adjusting ring (602) rotatably mounted on the anti-leakage head (500), and an elastic rotating ring (603) connected to the adjusting ring (602). The leak-proof head (500) has an annular groove (503), and the adjusting ring (602) is rotatably installed on the inner side of the annular groove (503); When the adjusting ring (602) rotates, the position of the anti-blocking strip (601) can be adjusted by the sliding column (601c).

4. The under-bed igniter for a circulating fluidized bed as described in claim 3, characterized in that: The adjusting ring (602) is provided with a guide groove (602a), the sliding column (601c) passes through the guide groove (602a), the leak-proof head (500) is provided with a sliding groove (504) parallel to the axial direction, and the sliding column (601c) extends to the inner side of the sliding groove (504). The elastic rotating ring (603) includes a positioning protrusion (603a) fixed on the leak-proof head (500), an arc column (603b) penetrating the positioning protrusion (603a), a first elastic element (603c) sleeved on the outside of the arc column (603b), and a connecting block (603d) connecting the arc column (603b) and the adjusting ring (602).

5. The under-bed igniter for a circulating fluidized bed as described in claim 4, characterized in that: It also includes, The shielding mechanism (700) includes an inner ring (701) rotatably connected to the outside of the central tube (200), an inner connector (702) provided on the inner ring (701), an outer ring (703) connected to the inner ring (701) through the inner connector (702), and a shielding plate (704) provided on the outer ring (703). An angle deflection mechanism (800) is provided on the central shaft tube (200), and is connected to the inner ring (701), which can drive the inner ring (701) to rotate; The pressing mechanism (900), which is mounted on the oil gun (300), is capable of driving the angle deflection mechanism (800) to rotate.

6. The under-bed igniter for a circulating fluidized bed as described in claim 5, characterized in that: The angle deflection mechanism (800) includes a rotating body (801) rotatably mounted on the central shaft tube (200), a force-bearing protrusion (802) fixed on the rotating body (801), and a synchronization component (803) connecting the rotating body (801) and the inner ring (701). The pressing mechanism (900) includes a fixed body (901) connected to the oil gun (300) and a pressing column (902) mounted on the fixed body (901).

7. The under-bed igniter for a circulating fluidized bed as described in claim 6, characterized in that: The angle deflection mechanism (800) includes a concentric column (804) fixed to the end of the rotating body (801), a blocking block (805) fixed to the outside of the central tube (200), and a second elastic element (806) sleeved on the outside of the concentric column (804) and located between the blocking block (805) and the rotating body (801).

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