CN109827171B - Fluidized bed boiler for petroleum coke combustion desulfurization - Google Patents
Fluidized bed boiler for petroleum coke combustion desulfurization Download PDFInfo
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- CN109827171B CN109827171B CN201910196452.4A CN201910196452A CN109827171B CN 109827171 B CN109827171 B CN 109827171B CN 201910196452 A CN201910196452 A CN 201910196452A CN 109827171 B CN109827171 B CN 109827171B
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Abstract
The invention provides a fluidized bed boiler for petroleum coke combustion desulfurization, which particularly relates to the technical field of fluidized bed boilers, and comprises a hearth, a material separator, a solid storage box, a feed back box and a plurality of ventilation pipes, wherein the lower part in the hearth is provided with a wind distribution plate, the side wall of the hearth above the wind distribution plate is provided with a feed back inlet, the upper end of the hearth is communicated with the feed end of the material separator, a stirring device is arranged in the solid storage box, the solid outlet of the material separator is communicated with the inlet of the solid storage box, the outlet of the solid storage box is connected with the upper end of a feed pipe, the upper end and the lower end of the feed back box are respectively provided with a solid inlet and a feed back outlet, the solid inlet is connected with the lower end of the feed pipe, the feed back outlet is provided with a feed back valve, the feed back pipe is obliquely arranged, and the upper end and the lower end of the feed back pipe are respectively connected with the feed back outlet and the feed back inlet, and the upper end of the ventilation pipe hearth or the feed back pipe are respectively communicated. The invention is beneficial to the stability of combustion in the hearth.
Description
Technical Field
The invention belongs to the technical field of fluidized bed boilers, and particularly relates to a fluidized bed boiler for petroleum coke combustion desulfurization.
Background
Petroleum coke is one of the main byproducts of the oil refining industry, and is a main raw material for preparing carbon materials, particularly prebaked anodes (also called carbon anodes, simply called anodes) for aluminum. Petroleum coke is classified into high sulfur coke (S content not less than 3%) and low sulfur coke (S content not more than 2%) according to sulfur content. The sulfur content in petroleum coke determines the end use of petroleum coke, and high sulfur coke is mainly used as fuel and is desulfurized and combusted by a fluidized bed boiler. The prior fluidized bed boiler for petroleum coke combustion desulfurization generally comprises a hearth, a material separator, a feed back box and a plurality of ventilation pipes, wherein petroleum coke particles in the hearth enter the material separator along with flue gas, separated materials enter the feed back box and then enter the hearth through the feed back pipe for combustion, but the sizes of the petroleum coke particles separated by the material separator are inconsistent, so that the mixing degree of the petroleum coke particles falling into the feed back box is poor, the combustion disturbance in the hearth is larger, that is, the combustion is unstable.
There is thus an urgent need for a fluidized bed boiler for petroleum coke combustion desulfurization that can solve the existing problems.
Disclosure of Invention
The invention aims to provide a fluidized bed boiler for petroleum coke combustion desulfurization, which is provided with a solid storage box, wherein a stirring device is arranged in the solid storage box, so that particles of return materials entering a hearth are uniformly mixed, and the stability of combustion in the hearth is facilitated.
The invention provides the following technical scheme:
the utility model provides a fluidized bed boiler for petroleum coke combustion desulfurization, includes furnace, material separator, solid storage case, feed back case and a plurality of ventilation pipe, the lower part in the furnace is equipped with the air distribution board, is located the air distribution board top the lateral wall of furnace is equipped with the feed back import, furnace's upper end with material separator's feed end is linked together, be equipped with agitating unit in the solid storage case, material separator's solid outlet with solid storage case's import is linked together, solid storage case's export links to each other with the upper end of inlet pipe, feed back case's upper end tip and lower extreme tip are equipped with solid inlet and feed back export respectively, solid inlet connection the lower extreme of inlet pipe, be equipped with the solenoid valve on the inlet pipe, the feed back export is equipped with the feed back valve, the feed back export with the feed back import is linked together through the feed back pipe slope, the upper end and the lower extreme of feed back pipe respectively with the feed back export with the feed back import links to each other, with furnace or the upper end intercommunication of feed back pipe.
Preferably, the stirring device comprises a motor and a stirring rod, the stirring rod is arranged in the solid storage box, the upper end of the stirring rod penetrates through the upper end part of the solid storage box and is connected with the motor, and a plurality of stirring paddles are arranged on the stirring rod in the solid storage box.
Preferably, the wind distribution plate is evenly provided with a plurality of hoods, each hood comprises a cylindrical wind column and a cylindrical cap which are integrally combined, the diameter of each cap is larger than that of each wind column, each wind column and each cap are respectively provided with an inner cavity and are communicated with each other, each cap is provided with a plurality of first wind eyes, each first wind eye is communicated with the inner cavity of each cap, each hood is provided with a shielding cover in a detachable mode, and each shielding cover is used for blocking wind in the inner cavity of each wind column from the corresponding first wind eye to enter the corresponding hearth.
Preferably, the shielding cover is provided with a plurality of second air eyes, the shielding cover is hollow and cylindrical, the shielding cover is sleeved outside the cap, the shielding cover is in threaded connection with the cap, the shapes and the sizes of the first air eyes and the second air eyes are the same, and the axes of the first air eyes and the second air eyes can be overlapped.
Preferably, the shielding cover is cylindrical, the cap is provided with a jack, the axis of the jack is identical to that of the cap and that of the wind column, the shielding cover is inserted into the jack and can enter the inner cavities of the cap and the wind column, and the shielding cover is in threaded connection with the inner walls of the inner cavities of the cap and the wind column.
Preferably, the gas outlet of the material separator is communicated with the flue, all ventilation pipes are respectively provided with a ventilation regulating valve capable of regulating the air quantity, all ventilation pipes are connected in parallel on a ventilation manifold, and the ventilation manifold penetrates through the flue.
The beneficial effects of the invention are as follows:
after petroleum coke burns in the furnace, petroleum coke particles can enter the material separator along with flue gas, then be separated and enter the solid storage box, the petroleum coke particles size that separates down is unequal, fully stir through agitating unit then open the solenoid valve and enter the storage in the feed back box again, and open the feed back valve, get back to and burn in the furnace under ventilation pipe ventilation effect, the more even of petroleum coke particle mixture through agitating unit stirring, the more even of petroleum coke particle mixture in the feed back box like this, and then make the more even of particle mixture of the feed back in the furnace, be favorable to the stability of combustion in the furnace.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a structure of a wind distribution plate of a shielding cover provided with a second wind hole;
FIG. 3 is a schematic view of the hood of FIG. 2;
FIG. 4 is a schematic view of the structure of the air distribution plate with the jack of the present invention;
fig. 5 is a schematic structural view of the corresponding hood of fig. 4.
Wherein the figures are marked as: 1. a furnace; 2. a material separator; 3. a solids storage bin; 4. a feed returning box; 5. a ventilation pipe; 6. a wind distribution plate; 7. a stirring device; 71. a motor; 72. a stirring rod; 73. stirring blades; 8. a feed pipe; 9. an electromagnetic valve; 10. a feed back outlet; 11. a feed back valve; 12. a feed back pipe; 13. a feed back inlet; 14. a hood; 141. a wind column; 142. a cap; 143. a first wind eye; 144. a shielding cover; 145. a second wind eye; 15. a flue; 16. a ventilation manifold; 17. and a ventilation regulating valve.
Detailed Description
As shown in fig. 1-5, a fluidized bed boiler for petroleum coke combustion desulfurization comprises a hearth 1, a material separator 2, a solid storage box 3, a feed back box 4 and a plurality of ventilation pipes 5, wherein an air distribution plate 6 is arranged at the lower part in the hearth 1, a feed back inlet 13 is arranged on the side wall of the hearth 1 above the air distribution plate 6, the upper end of the hearth 1 is communicated with the feeding end of the material separator 2, a stirring device 7 is arranged in the solid storage box 3, the solid outlet of the material separator 2 is communicated with the inlet of the solid storage box 3, the outlet of the solid storage box 3 is connected with the upper end of a feeding pipe 8, the upper end and the lower end of the feed back box 4 are respectively provided with a solid inlet and a feed back outlet 10, the solid inlet is connected with the lower end of the feeding pipe 8, an electromagnetic valve 9 is arranged on the feeding pipe 8, the feed back outlet 10 is provided with a feed back valve 11, the feed back outlet 10 and the feed back inlet 13 are communicated through a feed back pipe 12, the upper end and the lower end of the feed back pipe 12 are respectively connected with the feed back outlet 10 and the feed back inlet 13, and the 5 is communicated with the upper end of the hearth 1 or the feed back pipe 12. After petroleum coke is combusted in the hearth 1, petroleum coke particles enter the material separator 2 along with flue gas and then are separated into the solid storage box 3, the separated petroleum coke particles are different in size, the petroleum coke particles are fully stirred by the stirring device 7 and then enter the feed back box 4 for storage, the feed back valve 11 is opened to return to the hearth 1 for combustion under the ventilation effect of the ventilation pipe 5, and the petroleum coke particles stirred by the stirring device 7 are more uniformly mixed, so that the petroleum coke particles entering the feed back box 4 are more uniformly mixed, the particles of the feed back material entering the hearth 1 are more uniformly mixed, and the combustion stability in the hearth 1 is facilitated.
Specifically, the stirring device 7 comprises a motor 71 and a stirring rod 72, the stirring rod 72 is arranged in the solid storage box 3, the upper end of the stirring rod 72 penetrates through the upper end part of the solid storage box 3 to be connected with the motor 71, and the stirring rod 72 positioned in the solid storage box 3 is provided with a plurality of stirring paddles 73. This is a stirring device 7.
Specifically, the air distribution plate 6 is evenly provided with a plurality of hoods 14, the hoods 14 comprise integrally-synthesized cylindrical air columns 141 and cylindrical caps 142, the diameter of each cap 142 is larger than that of each air column 141, each air column 141 and each cap 142 are provided with an inner cavity and are communicated with each other, each cap 142 is provided with a plurality of first air eyes 143, each first air eye 143 is communicated with the inner cavity of each cap 142, each cap 142 is detachably provided with a shielding cover 144, and the shielding covers 144 are used for blocking air in the inner cavity of each air column 141 from the corresponding first air eye 143 to enter the hearth 1. In the actual use process, the number of the hoods 14 can be adjusted according to the materials in the hearth 1, generally, the hoods 14 are pulled out, and then the pulled-out positions are blocked, in this embodiment, the first air holes 143 of the caps 142 can be blocked only by using the shielding cover 144, the hoods 14 do not need to be pulled out, and the operation is simpler.
Specifically, the shielding cover 144 is provided with a plurality of second air eyes 145, the shielding cover 144 is hollow and cylindrical, the shielding cover 144 is sleeved outside the cap 142, the shielding cover 144 is in threaded connection with the cap 142, the shape and the size of the first air eyes 143 are the same as those of the second air eyes 145, and the axes of the first air eyes 143 and the second air eyes 145 can be coincident. This is a mode of sheltering from first eye 143, during normal use, make the axis coincidence of first eye 143 and second eye 145, wind enters into the inner chamber of cap 142 through the inner chamber of wind post 141 in the furnace 1 of grid plate 6 below like this, again enter into the furnace 1 of grid plate 6 top through first eye 143 and second eye 145 in proper order, accomplish normal air feed, when need not the hood 14 to ventilate, only need twist and move the shielding cover 144, the lateral wall that makes shielding cover 144 shelter from first eye 143 can, replace the manual work to pull out the operation of hood 14, save operating time.
Specifically, the shielding cover 144 is cylindrical, the cap 142 is provided with a jack, the axis of the jack is identical to that of the cap 142 and the air column 141, the shielding cover 144 is inserted into the jack and can enter the inner cavities of the cap 142 and the air column 141, and the shielding cover 144 is in threaded connection with the inner walls of the inner cavities of the cap 142 and the air column 141. That is, the shield 144 is screwed to the inner wall of the inner cavity of the cap 142 and the inner wall of the inner cavity of the air column 141. This is a mode of shielding first wind hole 143, during normal use, make shielding cover 144 be located the inner chamber of cap 142 and not stop the normal ventilation of first wind hole 143, when need not hood 14 to ventilate, only need twist and move shielding cover 144, make shielding cover 144 insert in the inner chamber of wind post 141, make the wind in furnace 1 of grid plate 6 below unable entering into the inner chamber of cap 142, thereby unable entering into furnace 1 of the top of grid plate 6 through first wind hole 143, replace the manual work to extract the operation of hood 14, practice thrift operating time.
Specifically, the gas outlet of the material separator 2 is communicated with the flue 15, all ventilation pipes 5 are respectively provided with a ventilation regulating valve 17 capable of regulating the air quantity, all ventilation pipes 5 are connected in parallel on one ventilation manifold 16, and the ventilation manifold 16 penetrates through the flue 15. The flue gas flowing out of the flue 15 can preheat the air in the ventilation header 16, and the disturbance to the temperature in the hearth 1 is reduced.
The above is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that the present invention is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The utility model provides a fluidized bed boiler for petroleum coke combustion desulfurization, its characterized in that includes furnace, material separator, solid storage case, feed back case and a plurality of ventilation pipe, the lower part in the furnace is equipped with the air distribution board, is located the lateral wall of furnace above the air distribution board is equipped with the feed back import, the upper end of furnace with the feed-in end of material separator is linked together, be equipped with agitating unit in the solid storage case, the solid outlet of material separator with the import of solid storage case is linked together, the export of solid storage case links to each other with the upper end of inlet pipe, the upper end tip and the lower extreme tip of feed back case are equipped with solid import and feed back export respectively, the solid import is connected the lower extreme of inlet pipe, be equipped with the solenoid valve on the inlet pipe, the feed back export with the feed back import is linked together through the feed back pipe, the upper end and the lower extreme of feed back pipe link to each other with the feed back export of feed back import respectively, with the upper end of furnace or feed back pipe intercommunication;
the stirring device comprises a motor and a stirring rod, the stirring rod is arranged in the solid storage box, the upper end of the stirring rod penetrates through the upper end part of the solid storage box to be connected with the motor, and a plurality of stirring paddles are arranged on the stirring rod in the solid storage box;
the wind distribution plate is uniformly provided with a plurality of wind caps, each wind cap comprises a cylindrical wind column and a cylindrical cap which are integrally combined, the diameter of each cap is larger than that of each wind column, each wind column and each cap are respectively provided with an inner cavity and are communicated, each cap is provided with a plurality of first wind eyes, each first wind eye is communicated with the inner cavity of each cap, each cap cover is detachably provided with a shielding cover, and each shielding cover is used for blocking wind in the corresponding inner cavity of each wind column from entering the corresponding furnace chamber from each first wind eye;
the shielding cover is provided with a plurality of second air eyes, the shielding cover is hollow and cylindrical, the shielding cover is sleeved outside the cap, the shielding cover is in threaded connection with the cap, the shapes and the sizes of the first air eyes and the second air eyes are the same, and the axes of the first air eyes and the second air eyes coincide.
2. The fluidized bed boiler for petroleum coke combustion desulfurization according to claim 1, wherein the shielding cover is cylindrical, the cap is provided with a jack, the axis of the jack is identical to the axis of the cap and the axis of the air column, the shielding cover is inserted into the jack and can enter the inner cavities of the cap and the air column, and the shielding cover is in threaded connection with the inner walls of the inner cavities of the cap and the air column.
3. The fluidized bed boiler for petroleum coke combustion desulfurization according to claim 1, wherein the gas outlet of the material separator is communicated with a flue, all the ventilation pipes are respectively provided with a ventilation regulating valve capable of regulating the air quantity, all the ventilation pipes are connected in parallel on a ventilation manifold, and the ventilation manifold penetrates through the flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910196452.4A CN109827171B (en) | 2019-03-15 | 2019-03-15 | Fluidized bed boiler for petroleum coke combustion desulfurization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910196452.4A CN109827171B (en) | 2019-03-15 | 2019-03-15 | Fluidized bed boiler for petroleum coke combustion desulfurization |
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| CN109827171A CN109827171A (en) | 2019-05-31 |
| CN109827171B true CN109827171B (en) | 2024-03-08 |
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