CN210856015U - Slag discharging device of fluidized bed gasification furnace - Google Patents
Slag discharging device of fluidized bed gasification furnace Download PDFInfo
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- CN210856015U CN210856015U CN201921044359.3U CN201921044359U CN210856015U CN 210856015 U CN210856015 U CN 210856015U CN 201921044359 U CN201921044359 U CN 201921044359U CN 210856015 U CN210856015 U CN 210856015U
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Abstract
The utility model provides a sediment device of arranging of fluidized bed gasifier, include: a high-pressure slag hopper; wherein, the high-pressure slag hopper is communicated with the bottom of the gasification furnace through a slag discharge pipeline; a central jet gasification agent pipeline is arranged in the deslagging pipeline, and an annular-gap deslagging channel is formed between the central jet gasification agent pipeline and the deslagging pipeline; an annular space gasification agent inlet pipeline is tangentially arranged on the side wall of the slag discharge pipeline, and the annular space gasification agent inlet pipeline inclines towards the inlet direction of the slag discharge pipeline; the annular space gasification agent inlet pipeline is communicated with the annular space deslagging channel, so that the gasification agent entering the annular space deslagging channel can flow upwards along the side wall in the annular space deslagging channel in a spiral mode. The utility model discloses in, set up annular space gasification agent admission line through along the tangential on the lateral wall of row's sediment pipeline to make this annular space gasification agent admission line to arranging sediment pipeline import direction slope, can follow the lateral wall spiral with the gasification agent of guaranteeing to get into in the annular space row's sediment passageway and upwards flow, make the even dispersion of lime-ash, in order smooth and easy the high-pressure sediment fill of discharging into.
Description
Technical Field
The utility model relates to a coal gasification technical field particularly, relates to a sediment device of arranging 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 bottom of the fluidized bed gasification furnace is provided with a conical distribution plate, and is generally provided with three paths of gasification agent channels, wherein one path of gasification agent channels enters the gasification furnace through a small hole formed in the surface of the conical plate; one path enters through a central jet pipe arranged in the middle of the distribution plate and is used for strengthening the turbulent effect of the center of the bed layer and strengthening gas-solid contact; the other path enters through the bottom of a cylindrical ring pipe on the outer side of the central jet pipe, the annular gap is a slag discharging channel, ash is discharged out of the gasification furnace through the channel, and the discharge amount of the ash is adjusted by controlling the gas introduction amount at the bottom of the ring pipe.
However, most of ash in the ring pipe flows downwards along the inner wall of the ring pipe, and the gas in the annular gap flows upwards in the area which is far away from the wall surface of the ring pipe and has little ash or no ash, namely the annular gap gas generates a short circuit phenomenon, and the larger the industrial scale gasification furnace with larger scale and the distribution plate with larger annular gap, the more serious the drift phenomenon. It can be seen that the annular gap air-controlled slag discharging mode and the slag discharging system have great problems. Therefore, the development of a slag discharging device which is reasonable in structure and smoothly and controllably discharges slag is very important for realizing the long-term stable operation of the fluidized bed gasification furnace.
Disclosure of Invention
In view of this, the utility model provides a sediment device of fluidized bed gasifier aims at solving the inhomogeneous and unstable problem of arranging the sediment of gas-solid contact that present sediment device exists at the sediment in-process of arranging.
In one aspect, the utility model provides a sediment device is arranged to fluidized bed gasifier, include: a high-pressure slag hopper; wherein the high-pressure slag hopper is communicated with the bottom of the gasification furnace through a slag discharge pipeline; a central jet gasification agent pipeline is arranged in the slag discharge pipeline, and an annular gap slag discharge channel is formed between the central jet gasification agent pipeline and the slag discharge pipeline; an annular space gasification agent inlet pipeline is tangentially arranged on the side wall of the slag discharge pipeline, and the annular space gasification agent inlet pipeline inclines towards the inlet direction of the slag discharge pipeline; the annular space gasification agent inlet pipeline is communicated with the annular space slag discharging channel, so that the gasification agent entering the annular space slag discharging channel can flow upwards along the side wall in the annular space slag discharging channel in a spiral manner, ash in the annular space slag discharging channel is discharged into the high-pressure slag hopper after being uniformly dispersed
Furthermore, in the slag discharge device of the fluidized bed gasification furnace, the elevation angle of the annular space gasification agent inlet pipeline relative to the horizontal plane is 5-30 degrees.
Further, in the slag discharge device of the fluidized bed gasification furnace, the annular space gasification agent inlet pipeline is a square pipeline with a rectangular section.
Further, in the slag discharging device of the fluidized bed gasification furnace, the width of the annular space gasification agent inlet pipeline is 0.15-0.35 times of the inner diameter of the pipe section provided with the tangential air inlet on the slag discharging pipeline, and the height of the annular space gasification agent inlet pipeline is 0.3-0.7 times of the inner diameter of the pipe section provided with the tangential air inlet on the slag discharging pipeline.
Further, in the slag discharge device of the fluidized bed gasification furnace, the central jet gasification agent pipe includes: the vertical pipe section and the horizontal pipe section are communicated; the horizontal pipe section penetrates through the slag discharge pipeline and is communicated with the bottom of the vertical pipe section.
Further, in the slag discharging device of the fluidized bed gasification furnace, the vertical distance from the bottom of the annular space gasification agent inlet pipeline to the bottom of the horizontal pipe section of the central jet flow gasification agent pipeline is 0.1-0.2 times of the inner diameter of the pipe section provided with the tangential air inlet on the slag discharging pipeline.
Further, in the slag discharge device of the fluidized bed gasification furnace, the annular space gasification agent inlet pipe is arranged on the wall surface of one side of the high-pressure slag hopper in a penetrating manner and is obliquely arranged on the side wall of the slag discharge pipe.
Furthermore, in the slag discharge device of the fluidized bed gasification furnace, the horizontal pipe section of the central jet gasification agent pipeline is positioned below the annular space gasification agent inlet pipeline.
Further, in the slag discharge device of the fluidized bed gasification furnace, the slag discharge pipe includes: the diameter reducing section, the first straight cylinder section, the diameter expanding section and the second straight cylinder section are sequentially communicated along the vertical direction; wherein the caliber of the reducing section is gradually reduced from the bottom of a gas distribution plate in the gasification furnace to the inlet end of the first straight cylinder section; the caliber of the diameter expanding section is gradually increased from the outlet end of the first straight cylinder section to the inlet end of the second straight cylinder section; the diameter of the inlet end of the diameter expanding section is equal to that of the outlet end of the diameter reducing section, and the diameter of the outlet end of the diameter expanding section is larger than that of the inlet end of the diameter reducing section; and the inner diameter of the second straight cylinder section is equal to the inner diameter of the pipe section provided with the tangential air inlet on the slag discharge pipeline.
Further, in the slag discharge device of the fluidized bed gasification furnace, the diameter of the first straight cylinder section is 0.4-0.8 times of the diameter of the second straight cylinder section.
Compared with the prior art, the beneficial effects of the utility model reside in that, the utility model provides a sediment device is arranged to fluidized bed gasifier, through set up annular gap gasification agent admission line along the tangential on the lateral wall of arranging the sediment pipeline, and make this annular gap gasification agent admission line to arranging sediment pipeline import direction slope, can upwards flow along the lateral wall spiral with the gasification agent of guaranteeing to get into in the annular gap slag discharging channel, with the ash slag contact in the more abundant same annular gap slag discharging channel, make the even dispersion of ash slag, in order smooth and easy the high-pressure sediment fill of discharging into, solved among the prior art because the ash slag adherence descends, the gas-solid contact that the gasification agent short circuit leads to is uneven and arrange the unstable problem of sediment.
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 slag discharge device of a fluidized bed gasification furnace according to an embodiment of the present invention;
FIG. 2 is a top view of an annular gap inlet duct provided in an embodiment of the present invention relative to a slag discharge duct and a central jet gasifying agent duct;
FIG. 3 is a front view of the inlet of the annular gap air inlet duct relative to the slag discharge duct and the central jet gasifying agent duct in the embodiment of the present invention.
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, the slag discharging device of the fluidized bed gasification furnace according to the embodiment of the present invention includes: a high-pressure slag hopper 10; wherein, the high-pressure slag hopper 10 is communicated with the bottom of the gasification furnace through a slag discharge pipeline 20; a central jet gasification agent pipeline 40 is arranged in the slag discharge pipeline 20, and an annular gap slag discharge channel 50 is formed between the central jet gasification agent pipeline and the slag discharge pipeline; an annular space gasification agent inlet pipeline 30 is tangentially arranged on the side wall of the slag discharge pipeline 20, and the annular space gasification agent inlet pipeline 30 inclines towards the inlet direction of the slag discharge pipeline 20; the annular space gasification agent inlet pipeline 30 is communicated with the annular space deslagging channel 50, so that the gasification agent entering the annular space deslagging channel 50 can flow upwards along the side wall in the annular space deslagging channel 50 in a spiral manner, and ash in the annular space deslagging channel 50 is discharged into the high-pressure slag hopper 10 after being uniformly dispersed.
Specifically, the high-pressure slag hopper 10 has an elliptical head at the upper part, a cylindrical structure at the middle part, and a conical structure at the lower part. The present embodiment may further include: the slag water inlet of the variable pressure slag hopper 80 is communicated with the slag water outlet of the high pressure slag hopper 10. The structure of the slag discharging device can be consistent with that of the high-pressure slag hopper 10, and the slag hopper and the high-pressure slag hopper are matched to regularly discharge slag water in the slag discharging pipeline 20. The outlet end of the slag discharge pipeline 20 and the outlet end of the central jet gasification agent pipeline 40 can both extend into the high-pressure slag hopper 10.
The gasification furnace comprises an upper cylinder section 60 and a bottom gasification agent distribution chamber 70, wherein a conical gas distribution plate 701 is arranged in the gasification agent distribution chamber 70, a gasification agent inlet is formed in the side wall of the gasification agent distribution chamber 70 to be communicated with a gas chamber gas inlet pipeline 702, and a gasification agent entering from the gas chamber gas inlet pipeline 702 enters the gasification furnace through gas holes of the gas distribution plate 701 after being buffered and dispersed in the gasification agent distribution chamber 70.
The slag discharge pipeline 20 is directly communicated with the bottom of the gas distribution plate 701, the central jet gasification agent pipeline 40 is arranged inside the slag discharge pipeline 20, and the central jet gasification agent pipeline and the slag discharge pipeline are coaxially arranged to form an annular gap slag discharge channel, so that ash slag gasified in the gasification furnace is discharged, then is sequentially conveyed into the high-pressure slag hopper 10 and the variable-pressure slag hopper 80, and is discharged out of the system after being subjected to pressure reduction and temperature reduction. In practice, the central jet gasifying agent pipeline 40 is located on the central axis of the gas distribution plate 701 near the bottom, and jets high-speed airflow to strengthen the flow field in the gasifier and form a high-speed disturbed high-temperature area in the central area above the upper surface of the gas distribution plate 701.
Referring to fig. 2, the slag discharge pipe 20 may be a cylindrical structure with a constant diameter or a cylindrical structure with a variable diameter, and has a tangential gas inlet tangentially arranged on a side wall thereof, and the annular space gasifying agent inlet pipe 30 is inclined toward an inlet of the slag discharge pipe 20 and is communicated with the tangential inlet on the side wall of the slag discharge pipe 20 to deliver the gasifying agent to the annular space slag discharge passage.
The annular space gasification agent inlet pipeline 30 can be a circular pipe, a square pipe or a conical pipe and the like, and because the gasification agent enters along the tangential direction and flows towards the upper part of the slag discharge pipeline, most of gas can go upwards along the inner wall of the slag discharge pipeline 20 and is contacted with the slag accumulated and falling on the inner wall of the slag discharge pipeline 20, the gas and the solid can be better contacted, and the slag can be uniformly dispersed in the annular space slag discharge channel; meanwhile, the gasification agent enters along the tangential direction, ash particles accumulated on the wall surface of the slag discharging pipeline 20 can be loosened, the ash particles can be ensured to fall smoothly, and the phenomenon of short circuit of airflow caused by the fact that most ash particles are attached to the wall and descend in the prior art is avoided.
Preferably, the elevation angle of the annular space gasification agent inlet pipeline 30 relative to the horizontal plane is 5-30 degrees (not shown in the figure), so that the gasification agent can be more accurately ensured to enter the side wall of the slag discharge pipeline 20 in the tangential direction and then move above the annular space slag discharge channel 50, and the phenomenon that part of the gasification agent enters the high-pressure slag hopper 10 downwards to cause condensation phenomenon, so that the air inflow of the gasification agent is reduced, and ash and slag discharge is not facilitated is avoided.
The aforesaid obviously can derive, the sediment device of arranging of fluidized bed gasifier that provides in this embodiment, through set up annular space gasification agent admission line along the tangential on the lateral wall of arranging the sediment pipeline, and make this annular space gasification agent admission line to arranging sediment pipeline import direction slope, in order to guarantee that the gasification agent that gets into in the annular space sediment passageway can upwards flow along the lateral wall spiral, contact with the lime-ash in the more abundant annular space sediment passageway, make even dispersion of lime-ash, in the high-pressure slag fill of discharging into with smooth and easy, the problem of the gas-solid contact inequality and row's unstability that leads to because the lime-ash adherence descends among the prior art, the gasification agent short circuit has been solved.
Referring to fig. 1-3, in the above embodiment, the annular space gasifying agent inlet pipe 30 is a square pipe with a rectangular cross section. The width B of the annular space gasification agent inlet pipeline 30 is 0.15-0.35 times of the inner diameter of the pipe section P provided with the tangential air inlet on the slag discharge pipeline, and the height h of the annular space gasification agent inlet pipeline 30 is 0.3-0.7 times of the inner diameter D of the pipe section P provided with the tangential air inlet on the slag discharge pipeline, so that tangential inlet air flow is better formed, and the gasification agent is ensured to spirally ascend along the wall surface of the annular space slag discharge channel 50.
Further, the vertical distance C from the bottom of the annular space gasification agent inlet pipeline 30 to the bottom of the horizontal pipe section 402 of the central jet gasification agent pipeline is 0.1-0.2 times of the inner diameter D of the pipe section P provided with the tangential air inlet on the slag discharge pipeline; the distance from the bottom of the annular space gasification agent inlet pipeline 30 to the upper end of the pipe section P provided with the tangential air inlet on the slag discharge pipeline 20 is 1.5-3 times of the inner diameter of the pipe section P provided with the tangential air inlet on the slag discharge pipeline, so that the air flow entering tangentially along the side wall of the slag discharge pipeline 20 can be ensured to be better contacted with ash in the annular space slag discharge channel 50, the uniform mixing of gas and solid in the annular space slag discharge channel 50 is ensured, and the phenomenon of short circuit of the air flow is avoided.
More specifically, the annular space gasifying agent inlet pipe 30 is arranged through the wall surface of one side of the high-pressure slag hopper 10 and is obliquely arranged on the side wall of the slag discharging pipe 20. It can be seen that the annular space gasifying agent inlet pipe 30 is obliquely arranged with the slag discharging pipe 20 after penetrating through the high-pressure slag hopper 10, and compared with the mode of directly obliquely arranging the annular space gasifying agent inlet pipe on the slag discharging pipe 20, the arrangement space of the gasification furnace and the high-pressure slag hopper 10 in the vertical direction can be saved.
In the above embodiments, the central jet gasifying agent pipe 40 includes: a vertical pipe section 401 and a horizontal pipe section 402 which are communicated with each other; the horizontal pipe section 402 is communicated with the bottom of the vertical pipe section 401 through the slag discharge pipe 20. Preferably, the horizontal pipe section 402 is located below the annular space gasifying agent inlet pipe 30 to ensure that the gasifying agent entering from the annular space gasifying agent inlet pipe 30 sufficiently enters the annular space deslagging channel 50.
In order to save the arrangement space of the equipment, the horizontal pipe section 402 of the central jet gasification agent pipeline 40 is arranged on the wall surface on the other side of the high-pressure slag hopper 10 in a penetrating way and then communicated with the vertical pipe section 401.
In the above embodiments, the slag discharge duct 20 includes: the diameter reducing section 201, the first straight cylinder section 202, the diameter expanding section 203 and the second straight cylinder section 204 are sequentially communicated along the vertical direction; wherein, the caliber of the reducing section 201 is gradually reduced from the bottom of the gas distribution plate 701 in the gasification furnace to the inlet end of the first straight section 202; the caliber of the diameter expanding section 203 is gradually increased from the outlet end of the first straight-cylinder section 201 to the inlet end of the second straight-cylinder section 204; the diameter of the inlet end of the diameter expanding section 203 is equal to the diameter of the outlet end of the diameter reducing section 201, and the diameter of the outlet end of the diameter expanding section 203 is larger than the diameter of the inlet end of the diameter reducing section 201; and the inner diameter of the second straight cylinder section is equal to that of a pipe section P provided with a tangential air inlet on the slag discharge pipeline. Preferably, the diameter of the first straight cylinder section is 0.4-0.8 times the diameter of the second straight cylinder section.
Specifically, the diameter reducing section 201 and the diameter expanding section 203 may be both truncated cone-shaped structures, the first straight cylindrical section 202 is connected between the diameter reducing section 201 and the diameter expanding section 203, and the second straight cylindrical section 204 is connected at an outlet end of the diameter expanding section 203. The reducing section 201, the first straight-cylinder section 202, the expanding section 203 and the second straight-cylinder section 204 can be integrally formed. The caliber of the inlet end of the reducing section 201 is larger than that of the outlet end thereof, and the caliber of the inlet end of the reducing section 201 is equal to that of the bottom of the conical gas distribution plate 701; the diameter of the inlet end of the diameter expanding section 203 is smaller than that of the outlet end, the diameter of the inlet end of the diameter expanding section 203 is equal to that of the outlet end of the diameter reducing section 201, and the diameter of the outlet end of the diameter expanding section 203 is larger than that of the inlet end of the diameter reducing section 201. The diameter of the first straight cylindrical section 202 is equal to the outlet end caliber of the reducing section 201, the diameter of the second straight cylindrical section 204 is equal to the outlet end caliber of the expanding section 203, and the diameter of the first straight cylindrical section 202 is smaller than that of the second straight cylindrical section 204.
More specifically, the annular space gasification agent inlet pipe 30 is arranged on the wall surface of one side of the high-pressure slag hopper 10 in a penetrating manner and is obliquely arranged on the side wall of the second straight cylinder section 204. It can be seen that the annular space gasifying agent inlet pipeline 30 is obliquely arranged with the second straight cylinder section 204 after penetrating through the high-pressure slag hopper 10, so as to save the arrangement space of the gasification furnace and the high-pressure slag hopper 10 in the vertical direction.
Referring to fig. 2 and fig. 3 again, in this embodiment, the width B of the annular space gasifying agent inlet pipe 30 is 0.15 to 0.35 times the inner diameter of the second straight cylinder section 204, and the height h of the annular space gasifying agent inlet pipe 30 is 0.3 to 0.7 times the inner diameter D of the second straight cylinder section 204, so as to better form tangential inlet airflow and ensure that the gasifying agent spirally moves upwards along the wall surface of the annular space deslagging channel 50.
Further, the vertical distance C from the bottom of the annular space gasification agent inlet pipeline 30 to the bottom of the horizontal pipe section 402 of the central jet gasification agent pipeline is 0.1-0.2 times of the inner diameter D of the second straight cylinder section 204; the distance from the bottom of the annular space gasification agent inlet pipeline 30 to the inlet end of the second straight cylinder section 204 is 1.5-3 times of the inner diameter of the second straight cylinder section 204, so that the air flow entering along the tangential direction of the side wall of the second straight cylinder section 204 can be ensured to be better contacted with ash in the annular space slag discharging channel 50, the uniform mixing of gas and solid in the annular space slag discharging channel 50 is ensured, and the phenomenon of short circuit of the air flow is avoided.
During actual operation, ash at the bottom of the gasification furnace sequentially enters the first straight cylinder section 202, the diameter-expanding section 203 and the second straight cylinder section 204 through the diameter-reducing section 201, and the caliber of the inlet end of the diameter-reducing section 201 is larger than that of the outlet end, so that the ash at the bottom of the gasification furnace can be buffered and decelerated to stably slide downwards; the gasifying agent conveyed by the gasifying agent inlet pipeline 30 firstly enters the second straight cylinder section 204 along the tangential direction, gas contacts with ash particles on the wall surface to promote the ash particles to flow downwards, meanwhile, gasifying agent airflow ascends along the second straight cylinder section 204 and enters the first straight cylinder section 202 through the diameter expanding section 203, in the first straight cylinder section 202, the gas velocity of the gasifying agent is increased, the ash falling into the area possibly contains part of smaller particles mixed in large particles, the small particles are entrained with the ascending airflow and return to the upper gasification furnace bed layer to continue to participate in gasification reaction under higher gas velocity, and the ash generated after the reaction continuously falls down, thereby being beneficial to the adjustment of the particle size of slag discharge and the reduction of ash carbon residue; meanwhile, the gas velocity is increased, the turbulence degree of large-particle ash is also increased, and the large-particle ash is more smoothly discharged out of the slag discharge pipeline 20.
It can be seen that the reducing arrangement of the slag discharge pipeline 20 increases the gas velocity of the gasifying agent, and then the small particulate matters mixed in the large-particle ash slag continuously go upward and return to the fluidized bed to continuously participate in the reaction, and then continuously fall down and are discharged after the reaction, so that the ash slag generated in the gasification process can be more sufficiently discharged out of the gasification furnace, and the carbon residue of the ash slag is reduced.
To sum up, the utility model provides a sediment device of fluidized bed gasifier, set up annular space gasification agent admission line through along the tangential on the lateral wall at row's sediment pipeline, and make this annular space gasification agent admission line to arranging sediment pipeline import direction slope, in order to guarantee that the gasification agent that gets into in the annular space slag discharging channel can upwards flow along the lateral wall spiral, contact with the lime-ash in the more abundant slag discharging channel with the annular space, make the even dispersion of lime-ash, in the high-pressure slag fill of discharging into with smooth and easy, avoided the adherence down, the accumulational probability of lime-ash on the slag discharging pipeline inner wall has been reduced, make the incomplete charcoal that the sediment particle diameter is adjustable and reduced the lime-ash, make the gas-solid contact more even among the annular space slag discharging channel, arrange the sediment more stable, be favorable to realizing the long-term steady.
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. A slag discharge device of a fluidized bed gasification furnace is characterized by comprising: a high-pressure slag hopper; wherein the content of the first and second substances,
the high-pressure slag hopper is communicated with the bottom of the gasification furnace through a slag discharge pipeline; a central jet gasification agent pipeline is arranged in the slag discharge pipeline, and an annular gap slag discharge channel is formed between the central jet gasification agent pipeline and the slag discharge pipeline;
an annular space gasification agent inlet pipeline is tangentially arranged on the side wall of the slag discharge pipeline, and the annular space gasification agent inlet pipeline inclines towards the inlet direction of the slag discharge pipeline; the annular space gasification agent inlet pipeline is communicated with the annular space slag discharging channel, so that the gasification agent entering the annular space slag discharging channel can flow upwards in the annular space slag discharging channel along the side wall in a spiral mode, and ash in the annular space slag discharging channel is discharged into the high-pressure slag hopper after being uniformly dispersed.
2. The slag discharge apparatus of a fluidized-bed gasification furnace according to claim 1, wherein an angle of elevation of the annular space gasifying agent inlet duct with respect to a horizontal plane is 5 to 30 °.
3. The slag discharge apparatus for a fluidized-bed gasification furnace according to claim 1, wherein the annular space gasifying agent inlet duct is a square duct having a rectangular cross section.
4. The slag discharge apparatus of a fluidized-bed gasification furnace according to claim 3, wherein the width of the annular space gasification agent inlet pipe is 0.15 to 0.35 times the inner diameter of the pipe section provided with the tangential gas inlet on the slag discharge pipe, and the height of the annular space gasification agent inlet pipe is 0.3 to 0.7 times the inner diameter of the pipe section provided with the tangential gas inlet on the slag discharge pipe.
5. The slag discharge apparatus of a fluidized-bed gasification furnace according to claim 1, wherein the central jet gasification agent pipe includes: the vertical pipe section and the horizontal pipe section are communicated; wherein the content of the first and second substances,
the horizontal pipe section penetrates through the slag discharge pipeline and is communicated with the bottom of the vertical pipe section.
6. The slag discharge apparatus of a fluidized-bed gasification furnace according to claim 5, wherein a vertical distance from the bottom of the annular space gasification agent inlet pipe to the bottom of the horizontal pipe section of the central jet gasification agent pipe is 0.1 to 0.2 times an inner diameter of a pipe section provided with a tangential gas inlet on the slag discharge pipe.
7. The slag discharge device of a fluidized-bed gasification furnace according to claim 1, wherein the annular space gasifying agent inlet pipe is inserted into a wall surface of one side of the high-pressure slag hopper and is obliquely disposed on a side wall of the slag discharge pipe.
8. The slag discharge apparatus of a fluidized-bed gasification furnace according to claim 5, wherein the horizontal pipe section of the central jet gasification agent conduit is located below the annular space gasification agent inlet conduit.
9. The slag discharge apparatus of a fluidized-bed gasification furnace according to any one of claims 1 to 8, wherein the slag discharge duct includes: the diameter reducing section, the first straight cylinder section, the diameter expanding section and the second straight cylinder section are sequentially communicated along the vertical direction; wherein the content of the first and second substances,
the caliber of the reducing section is gradually reduced from the bottom of a gas distribution plate in the gasification furnace to the inlet end of the first straight cylinder section; the caliber of the diameter expanding section is gradually increased from the outlet end of the first straight cylinder section to the inlet end of the second straight cylinder section; the diameter of the inlet end of the diameter expanding section is equal to that of the outlet end of the diameter reducing section, the diameter of the outlet end of the diameter expanding section is larger than that of the inlet end of the diameter reducing section, and the inner diameter of the second straight cylinder section is equal to that of a pipe section provided with a tangential air inlet on the slag discharge pipeline.
10. The slag discharging device of a fluidized-bed gasification furnace according to claim 9, wherein an inner diameter of the first cylindrical section is 0.4 to 0.8 times an inner diameter of the second cylindrical section.
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| CN201921044359.3U CN210856015U (en) | 2019-07-05 | 2019-07-05 | Slag discharging device of fluidized bed gasification furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921044359.3U CN210856015U (en) | 2019-07-05 | 2019-07-05 | Slag discharging device of fluidized bed gasification furnace |
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| CN210856015U true CN210856015U (en) | 2020-06-26 |
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