CN213866083U - Gas distribution and slag discharging device of fluidized bed gasification furnace - Google Patents
Gas distribution and slag discharging device of fluidized bed gasification furnace Download PDFInfo
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- CN213866083U CN213866083U CN202022269657.1U CN202022269657U CN213866083U CN 213866083 U CN213866083 U CN 213866083U CN 202022269657 U CN202022269657 U CN 202022269657U CN 213866083 U CN213866083 U CN 213866083U
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Abstract
The utility model provides a sediment device under gas distribution of fluidized bed gasifier, this sediment device under gas distribution includes: a distribution plate and a center pipeline; the central pipeline penetrates through the distribution plate, and the bottom end of the central pipeline is provided with a small-diameter pipeline with the diameter smaller than that of the central pipeline and communicated with the central pipeline through a reducing pipeline; the bottom of the reducing pipeline is provided with a plurality of nozzles along the circumferential direction thereof for introducing regulating gas into the reducing pipeline so as to control the falling amount and the slag discharging speed of ash slag in the reducing pipeline. The utility model discloses a nozzle that sets up on the reducing pipeline leads to the regulation and control gas in to the reducing pipeline, and through the size of regulating and controlling this tolerance, control reducing pipeline lime-ash whereabouts volume and falling speed under the sediment, solve among the prior art gas accuse and arrange sediment volume unstability, uncontrollable scheduling problem for gas-solid fluidization misce bene, arrange sediment stable controllable, realize the high-efficient steady operation of fluidized bed gasifier.
Description
Technical Field
The utility model relates to a gasifier technical field particularly, relates to a sediment device under cloth gas of fluidized bed gasifier.
Background
Coal gasification technology is an important way to utilize coal cleanly and efficiently. China is rich in coal resources and deficient in oil and gas resources, and abundant coal is converted into clean gas, so that the coal is attracted by much attention and applied in recent years. The fluidized bed gasification furnace is widely applied to a coal gasification process due to the reasons of uniform temperature in the furnace, uniform gas-solid mixing, good contact, high gasification efficiency and the like. The quality of the fluidized bed depends on the quality of fluidization, stable feeding and discharging of materials and the like, and particularly, the stability of slag discharge determines the stable control of the bed height in the fluidized bed and the stable operation of the gasification process.
The structural design and the operation stability of the gas distribution and slag discharging device influence the fluidization quality in the furnace, the slag discharging stability, the gasification reaction degree and the operation stability of the gasification furnace. The existing gas distribution and slag discharging device is commonly used and provided with a flat plate distribution plate, gas distribution small holes are arranged on the flat plate distribution plate, a slag discharging port is arranged on the side wall of the bottom of the gasification furnace, or a cylindrical slag discharging channel is arranged in the center of the flat plate distribution plate and is directly connected with a subsequent slag discharging system of the gasification furnace, and the slag discharging port is arranged on the side wall, so that the phenomenon of gas-solid material flow drift in the furnace is caused, and the fluidization quality and the slag discharging stability are influenced; the gas distribution and slag removal system with the slag discharging opening arranged at the center has the problems of thermal stress deformation of a slag discharging pipe, unstable and uncontrollable slag discharging amount of pneumatic control slag removal and the like.
Disclosure of Invention
In view of this, the utility model provides a sediment device under cloth gas of fluidized bed gasifier aims at solving the unstable, the uncontrollable problem of sediment of slagging that current distributing plate exists.
The utility model provides a sediment device under gas distribution of fluidized bed gasifier, this sediment device under gas distribution includes: a distribution plate and a center pipeline; the central pipeline penetrates through the distribution plate, and the bottom end of the central pipeline is provided with a small-diameter pipeline with the diameter smaller than that of the central pipeline and communicated with the central pipeline through a reducing pipeline; and a plurality of nozzles are arranged on the reducing pipeline along the circumferential direction of the reducing pipeline and used for introducing regulating gas into the reducing pipeline so as to control the falling amount and the slag discharging speed of ash in the reducing pipeline.
Further, the gas distribution and slag removal device of the fluidized bed gasification furnace gradually reduces the diameter of the reducing pipeline from the end part close to the central pipeline to the end part close to the small-diameter pipeline.
Further, in the gas distribution and slag discharging device of the fluidized bed gasification furnace, the reducing pipeline is in an inverted frustum structure, and the cone angle of the reducing pipeline is 40-90 degrees.
Further, according to the gas distribution and slag discharging device of the fluidized bed gasification furnace, the output end of the small-diameter pipeline is provided with an inclined pipeline, and an included angle is formed between the inclined pipeline and the small-diameter pipeline.
Further, according to the gas distribution and slag discharging device of the fluidized bed gasification furnace, the inclined pipeline is provided with a loosening gas inlet for introducing loosening gas into the inclined pipeline.
Further, according to the gas distribution and slag discharging device of the fluidized bed gasification furnace, the distribution plate is provided with the gas distribution open hole, and the gas distribution open hole is provided with the slag discharging prevention structure, so that when the gasification agent in the gas chamber of the gasification furnace is interrupted, the bed material on the upper portion of the distribution plate is prevented from falling from the gas distribution open hole.
Further, the gas distribution slag discharging device of the fluidized bed gasification furnace comprises: the communicating rod is slidably arranged in the air distribution open hole in a penetrating way; the slag-falling-preventing top plate is arranged at the top end of the connecting rod and is used for sliding downwards along with the connecting rod to be pressed above the gas distribution opening so as to prevent bed materials or ash slag on the upper part of the distribution plate from falling; and the limiting structure is arranged on the communication rod and used for limiting the communication rod when the communication rod slides upwards.
Further, the gas distribution slag discharging device of the fluidized bed gasification furnace comprises a limiting structure which comprises: the positioning block is arranged on the bottom wall of the distribution plate and is positioned at the periphery of the gas distribution opening; and the limiting plate is arranged at the bottom end of the communication rod and is used for jacking against the positioning block when sliding upwards along with the communication rod.
Furthermore, in the gas distribution and slag removal device of the fluidized bed gasification furnace, the top end of the central pipeline is arranged above the distribution plate, and the length of the part of the central pipeline arranged at the upper part of the distribution plate is 0.3-0.5 m; the bottom end of the central pipeline extends to the outside of the gasification furnace.
Further, according to the gas distribution and slag discharging device of the fluidized bed gasification furnace, a gap is formed between the central pipeline and the distribution plate, and a slag blocking plate is arranged on the central pipeline above the distribution plate and used for blocking the gap between the central pipeline and the distribution plate.
The utility model provides a sediment device under gas distribution of fluidized bed gasifier through the nozzle that sets up on the reducing line, leads to the regulation and control gas in to the reducing line, through the size of regulation and control this tolerance, and control reducing line ash sediment whereabouts volume and falling speed solve among the prior art gas accuse and arrange sediment volume unstability, uncontrollable scheduling problem for gas-solid fluidization misce bene, arrange sediment stable controllable, and then realize the high-efficient steady operation of fluidized bed gasifier. Meanwhile, the upper part of the reducing pipeline is thicker, so that ash can be ensured to fall smoothly; in addition, the lower part of the reducing pipeline and the small-diameter pipeline are arranged to be thin so as to reduce the using amount of the regulating gas, avoid causing large interference on the flow field of the distribution plate area, reduce the influence of the regulating gas with lower temperature on the temperature field of the relevant area after entering the reducing pipeline, and better control the slag discharge amount, namely, the slag discharge amount can be controlled within a larger control range by introducing less regulating gas amount.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural view of a gas distribution slag discharging device of a fluidized bed gasification furnace provided in an embodiment of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, it is a schematic structural diagram of a gas distribution and slag discharging device of a fluidized bed gasifier provided in an embodiment of the present invention. As shown in the figure, the gas distribution slag discharging device comprises: a distribution plate 1 and a center pipe 2; wherein the content of the first and second substances,
the central pipeline 2 penetrates through the distribution plate 1, and the bottom end of the central pipeline 2 is provided with a small-diameter pipeline 3 with the diameter smaller than that of the central pipeline 2, and the small-diameter pipeline 3 is communicated with the central pipeline 2 through a reducing pipeline 4. Specifically, the distribution plate 1 may be disposed at the bottom of the gasification furnace 5, a gas chamber 51 is formed between the distribution plate 1 and a bottom shell of the gasification furnace 5, and gasification agent inlets 511 are symmetrically disposed on two sides of a sidewall of the gas chamber 51, and are used for introducing a gasification agent into the gas chamber 51, and the gasification agent is uniformly dispersed in the gas chamber 51 and then enters an upper bed layer of the gasification furnace 5 through the distribution plate 1, i.e., a cavity above the distribution plate 1, so that ash generated after the contact reaction between the bed material and the gasification agent entering through the distribution plate 1 is converted is sequentially discharged through the central pipeline 2. The central pipeline 2 can be arranged at the right center of the distribution plate 1 so as to discharge the ash slag generated around through the central pipeline 2; the length of the part of the central pipeline 2 arranged at the upper part of the distribution plate 1 is 0.3-0.5 m, so that the bed material and the gasifying agent entering through the distribution plate 1 are in full contact reaction, namely the gasifying agent can enter the central pipeline 2 to be discharged out of the gasification furnace 5 only by flowing upwards to the top end of the central pipeline 2, and the gasifying agent can enter the central pipeline 2 only by flowing upwards, so that the retention time of the gasifying agent above the distribution plate 1 is prolonged, and the gasifying agent is in full contact, so that the carbon conversion rate is further improved; the lower portion of the central line 2 may be inserted into the bottom end of the gasification furnace 5 to directly extend to the outside of the gas chamber 51, i.e., the outside of the gasification furnace 5, and then ash is directly discharged to the outside of the gas chamber 51. The reducing pipeline 4 and the small-diameter pipeline 3 can be arranged outside the gasification furnace 5, the reducing pipeline 4 is thick at the top and thin at the bottom and is used for communicating the central pipeline 2 and the small-diameter pipeline 3, the diameter of the upper part of the reducing pipeline 4 is the same as that of the central pipeline 2, and the diameter of the lower part of the reducing pipeline 4 is the same as that of the small-diameter pipeline 3; preferably, the diameter of the reducing line 4 is gradually reduced from the end near the central line 2 to the end near the small-diameter line 3; further preferably, the reducing pipeline 4 is in an inverted cone structure, the included angle between the side walls of the reducing pipeline, namely the cone angle alpha, is 40-90 degrees, and the angle is set to ensure that logistics in the reducing area smoothly fall and no accumulation dead angle exists, so that long-time staying or blocking of ash residues at the reducing pipeline 4 is avoided. The small-diameter pipeline 3 can be a cylindrical barrel structure, and the length of the small-diameter pipeline is 1-2 times of the inner diameter, so that the slag discharge amount can be controlled, and meanwhile, the phenomenon that ash residues stay in the small-diameter pipeline 3 for a long time to cause bridging and blockage can be avoided.
The reducing pipeline 4 is provided with a plurality of nozzles 41 along the circumferential direction, and the nozzles 41 can be arranged at the bottom of the reducing pipeline 4 and used for introducing regulating gas into the reducing pipeline 4 so as to control the falling amount and the slag discharging speed of the ash slag in the reducing pipeline 4. Specifically, a plurality of nozzles 41 can be uniformly arranged on the reducing pipeline 4 along the circumferential direction thereof to introduce regulating gas into the reducing pipeline 4, and the ash falling amount and falling speed of the reducing pipeline 4 are controlled by regulating the gas amount; of course, there may be only one nozzle 41, and this embodiment is not limited thereto. The nozzle 41 is used for introducing the regulating and controlling gas into the reducing pipeline 4, the ash falling amount and falling speed of the reducing pipeline 4 are controlled by regulating and controlling the gas amount, meanwhile, the reducing pipeline 4 is combined, the upper part of the reducing pipeline 4 is thick, the ash is guaranteed to fall smoothly, in addition, the lower part of the reducing pipeline 4 is arranged to be thin, so that the using amount of the regulating and controlling gas is reduced, the large interference on the area flow field of the distribution plate 1 is avoided, meanwhile, the influence on the relevant area temperature field caused by the entering of the lower-temperature gas, namely the regulating and controlling gas is reduced, the slag discharging amount can be better controlled, and the slag discharging amount can be controlled within a large control range by introducing less regulating and controlling gas amount. The reducing pipeline 4 is arranged outside the gas chamber 51, so that the nozzle 41 can conveniently introduce the regulating gas into the reducing pipeline 4, and influence of introduced gas with lower temperature on the gas chamber 51 or temperature fields of other related areas can be reduced.
With continued reference to fig. 1, in order to facilitate the ash in the small-diameter line 3 to be discharged into the high-pressure hopper 6, it is preferable that the output end of the small-diameter line 3 is provided with an inclined line 7 for guiding the ash discharged from the small-diameter line 3 into the high-pressure hopper 6. Specifically, the inclined pipeline 7 and the small-diameter pipeline 3 are arranged at an included angle to form a bent slag discharge pipe, the thin bent slag discharge pipe is used for discharging slag conveniently, gas resistance and downstream operation fluctuation power are small if a straight pipeline is discharged, the slag discharge amount is not convenient to control, the problem that the slag discharge amount is large and the like is possibly caused, the bent pipe is arranged, the flow resistance and the pipeline pressure difference are increased, the operation-caused fluctuation is convenient to resist, and the slag discharge controllability is further guaranteed. In order to avoid the ash from staying in the inclined line 7, it is preferable that the lower portion of the inclined line 7 is provided with a loosening air inlet 71 for introducing loosening air into the inclined line 7 to assist the ash in the inclined line 7 to rapidly fall without staying. Wherein, the inclined pipeline 7 and the horizontal plane can form a 50-75 degree angle, which is convenient for the small-diameter pipeline 3 to rapidly fall into the high-pressure slag hopper 6 through the inclined pipeline 7.
With continued reference to fig. 1, a gap is formed between the central pipeline 2 and the distribution plate 1, so that when the expansion amounts of the central pipeline 2 and the distribution plate 1 are different due to different thermal stresses, the central pipeline 2 can freely extend upwards or downwards, and the problems that the central pipeline 2 or the distribution plate 1 is deformed and cracked due to different thermal stresses and different expansion amounts caused by the fact that the central pipeline 2 and the distribution plate 1 are fixedly connected into a whole are avoided. Specifically, a center hole 11 with an inner diameter larger than the outer diameter of the center pipeline 2 can be formed in the right center of the distribution plate 1 and penetrates through the distribution plate 1 along the thickness direction of the distribution plate 1, the center pipeline 2 can be a cylindrical structure with a hollow interior and two open ends and penetrates through the center hole 11, and a gap is formed between the center pipeline 2 and the center hole 11; preferably, the central line 2 is arranged coaxially with the central hole 11, so that there is a gap between the central line 2 and the central hole 11 along the entire circumference of the outer circumference of the central line 2. In order to ensure the connection stability between the central pipeline 2 and the distribution plate 1, preferably, a plurality of positioning support members 21 are arranged between the central pipeline 2 and the distribution plate 1 to position and support the central pipeline 2; the positioning support 21 may be plural so as to be evenly arranged at circumferential intervals in the gap between the center pipe 2 and the center hole 11. In order to prevent the bed material on the upper part of the distributor plate 1 from falling into the lower plenum 51 through this gap, it is preferable that a slag trap 22 is provided on the center pipe 2 above the distributor plate 1 to block the gap between the center pipe 2 and the distributor plate 1 to prevent the bed material on the upper part of the distributor plate 1 from falling into the plenum 51. Further preferably, the slag trap 22 includes a horizontal plate 221 and a vertical plate 222, the horizontal plate 221 may be an annular plate which is fitted over the central pipeline 2, the vertical plate 222 may be provided along the outer edge of the horizontal plate 221 along the entire circumference, and a gap may be provided between the bottom end of the vertical plate 222 and the distribution plate 1 to avoid interference between the vertical plate 222 and the central pipeline 2 or the distribution plate 1 when the central pipeline 2 or the distribution plate 1 is deformed; wherein the width of the horizontal plate 221 may be greater than the width of the gap between the central line 2 and the central hole 11; the positioning support 21 may be a cylindrical solid metal rod.
With reference to fig. 1, the distribution plate 1 may be a flat plate structure with a certain thickness, or an inverted conical plate structure, which is not limited in this embodiment; the distribution plate 1 is provided with gas distribution holes 12 so that the gasification agent input from the gasification agent inlet 511 enters a cavity on the upper part of the distribution plate 1 from the gas distribution holes 12; the air distribution opening 12 is preferably a circular hole, and may also be a square hole, a triangular hole, a diamond hole, or the like, which is not limited in this embodiment. In order to prevent the bed material on the upper part of the distribution plate 1 from falling into the air chamber 51 through the air distribution openings 12, the anti-slag-off structures 8 are arranged at the positions of the air distribution openings 12 and are used for preventing the bed material on the upper part of the distribution plate 1 from falling from the air distribution openings 12 when the gasifying agent in the air chamber is interrupted, so that the problem of material leakage of the distribution plate in the prior art is solved.
Refer to fig. 2, which is a schematic structural diagram of the slag-discharging prevention structure provided by the embodiment of the present invention. The slag-dropping prevention structure 8 includes: a connecting rod 81, a slag-off preventing top plate 82 and a limiting structure 83; wherein, the communicating rod 81 can be slidably arranged in the air distribution open hole 12 in a penetrating way; the slag falling prevention top plate 82 is arranged at the top end of the connecting rod 81 and is used for sliding downwards along with the connecting rod 81 to be pressed above the gas distribution opening 12 so as to prevent the falling of upper bed materials or ash slag in the upper bed layer of the gasification furnace; the limiting structure 83 is disposed on the connection rod 81 to limit the connection rod 81 when the connection rod 81 slides upwards, so as to prevent the connection rod 81 from separating upwards from the gas distribution open hole 12. Specifically, the structure of the anti-slagging top plate 82 is matched with the air distribution opening 12, and the size of the anti-slagging top plate can be slightly larger than the size of the air distribution opening 12, so that the anti-slagging top plate is pressed and contacted above the air distribution opening 12 when sliding downwards, the falling of upper bed materials or ash can be prevented, meanwhile, the connecting rod 81 can be limited, and the separation between the connecting rod 81 and the air distribution opening 12 is avoided; the limit structure 83 limits the position of the communication rod 81 when the communication rod slides upward.
In this embodiment, the limiting structure 83 includes: a positioning block 831 and a limiting plate 832; the positioning block 831 is located on the bottom wall of the distribution plate 1 (relative to the position shown in fig. 2) and located at the periphery of the gas distribution opening 12, and the limiting plate 832 is disposed at the bottom end of the connection rod 81 to press against the positioning block 831 when sliding upward along with the connection rod 81. Specifically, the positioning blocks 831 may be a plurality of positioning blocks, and are disposed along the circumferential direction of the gas distribution opening 12, two positioning blocks are exemplified in the embodiment, and are symmetrically disposed below the distribution plate 1 and are symmetrically disposed about the axis of the gas distribution opening 12, of course, they may also be an annular structure disposed along the circumferential direction of the gas distribution opening 12, and no limitation is made in this embodiment. The position limiting plate 832 is a plate-shaped structure and can be fixedly connected to the bottom end of the connecting rod 81, and the width (the length in the horizontal direction shown in fig. 2) of the position limiting plate 832 is larger than the distance between the positioning blocks 831, so that the position limiting plate can be pressed against the positioning blocks 831 to limit the connecting rod 81.
In this embodiment, the working principle of the slag discharging prevention structure 8 is as follows: when gas passes through the gas distribution open pore 12, the gas flow jacks up the slag discharge prevention top plate 82, the gas of the limiting structure enters the upper bed layer of the gasification furnace through the gas distribution open pore 12, and the limiting plate 832 at the lower part is clamped on the positioning block 821, namely is in jacking contact with the positioning block 821, so that the slag discharge prevention structure 8 is prevented from being blown into the upper bed layer; when no gas passes through the gas distribution opening 12, the slag falling prevention top plate 82 is pressed downwards above the gas distribution opening 12, and ash and bed materials in an upper bed layer are prevented from falling.
In summary, the gas distribution and slag discharging device of the fluidized bed gasification furnace provided by the embodiment introduces the regulating and controlling gas into the reducing pipeline 4 through the nozzle 41 arranged on the reducing pipeline 4, and controls the falling amount and falling speed of the ash slag of the reducing pipeline 4 by regulating and controlling the gas amount, so as to solve the problems of unstable and uncontrollable gas-controlled slag discharging and discharging amount, and the like in the prior art, so that the gas-solid fluidization is uniformly mixed, the slag discharging is stable and controllable, and the efficient and stable operation of the fluidized bed gasification furnace can be realized. Meanwhile, the upper part of the reducing pipeline 4 is thicker, so that ash can be ensured to fall smoothly; in addition, the lower part of the reducing pipeline 4 and the small-diameter pipeline 3 connected with the reducing pipeline are arranged to be thin so as to reduce the using amount of the regulating gas, avoid causing great interference on the flow field of the distribution plate 1 area, simultaneously reduce the influence of the regulating gas with lower temperature on the temperature field of the relevant area after entering the reducing pipeline, and better control the slag discharge amount, namely, the slag discharge amount can be controlled in a larger control range by introducing less regulating gas amount.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides a gas distribution slagging device of fluidized bed gasifier which characterized in that includes: a distribution plate and a center pipeline; wherein the content of the first and second substances,
the central pipeline penetrates through the distribution plate, and the bottom end of the central pipeline is provided with a small-diameter pipeline with the diameter smaller than that of the central pipeline and communicated with the central pipeline through a reducing pipeline;
and a plurality of nozzles are arranged on the reducing pipeline along the circumferential direction of the reducing pipeline and used for introducing regulating gas into the reducing pipeline so as to control the falling amount and the slag discharging speed of ash in the reducing pipeline.
2. The gas distribution and slag removal device of the fluidized-bed gasification furnace according to claim 1,
the diameter of the reducing pipeline is gradually reduced from the end part close to the central pipeline to the end part close to the small-diameter pipeline.
3. The gas distribution and slag removal device of the fluidized-bed gasification furnace according to claim 2,
the reducing pipeline is in an inverted frustum structure, and the cone angle of the reducing pipeline is 40-90 degrees.
4. The gas distribution and slag removal device of a fluidized-bed gasification furnace according to any one of claims 1 to 3,
the output end of the small-diameter pipeline is provided with an inclined pipeline, and the inclined pipeline and the small-diameter pipeline form an included angle.
5. The gas distribution and slag removal device of the fluidized-bed gasification furnace according to claim 4,
and a loosening air inlet is formed in the inclined pipeline and used for introducing loosening air into the inclined pipeline.
6. The gas distribution and slag removal device of a fluidized-bed gasification furnace according to any one of claims 1 to 3,
the distribution plate is provided with gas distribution openings, and slag falling prevention structures are arranged at the gas distribution openings and used for preventing bed materials on the upper part of the distribution plate from falling from the gas distribution openings when a gasification agent in an air chamber of the gasification furnace is interrupted.
7. The gas distribution slag tapping device of a fluidized bed gasification furnace according to claim 6, wherein the slag tapping prevention structure comprises:
the communication rod is slidably arranged in the air distribution open hole in a penetrating way;
the slag-falling-preventing top plate is arranged at the top end of the connecting rod and is used for sliding downwards along with the connecting rod to be pressed above the gas distribution opening so as to prevent bed materials or ash slag on the upper part of the distribution plate from falling;
and the limiting structure is arranged on the communication rod and used for limiting the communication rod when the communication rod slides upwards.
8. The gas distribution and slag discharging device of the fluidized bed gasification furnace according to claim 7, wherein the limiting structure comprises:
the positioning block is arranged on the bottom wall of the distribution plate and is positioned at the periphery of the gas distribution opening;
and the limiting plate is arranged at the bottom end of the communication rod and is used for jacking against the positioning block when sliding upwards along with the communication rod.
9. The gas distribution and slag removal device of a fluidized-bed gasification furnace according to any one of claims 1 to 3,
the top end of the central pipeline is arranged above the distribution plate, and the length of the part of the central pipeline arranged at the upper part of the distribution plate is 0.3-0.5 meter;
the bottom end of the central pipeline extends to the outside of the gasification furnace.
10. The gas distribution and slag removal device of a fluidized-bed gasification furnace according to any one of claims 1 to 3,
the central pipeline and the distribution plate are provided with a gap, and a slag trap is arranged above the distribution plate on the central pipeline and used for shielding the gap between the central pipeline and the distribution plate.
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| CN202022269657.1U CN213866083U (en) | 2020-10-13 | 2020-10-13 | Gas distribution and slag discharging device of fluidized bed gasification furnace |
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