CN212901479U - Hood and air distribution system thereof - Google Patents
Hood and air distribution system thereof Download PDFInfo
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- CN212901479U CN212901479U CN202021442055.5U CN202021442055U CN212901479U CN 212901479 U CN212901479 U CN 212901479U CN 202021442055 U CN202021442055 U CN 202021442055U CN 212901479 U CN212901479 U CN 212901479U
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Abstract
The utility model discloses a hood and cloth wind system thereof, the hood includes: the air cap head comprises a top part, a side part and a bottom part, wherein the top part and the side part enclose an internal cavity, and the bottom part is provided with an air inlet and is communicated with the internal cavity; the air outlet channel is arranged on the side part and is communicated with the inner cavity; the air outlet channel is firstly slightly tapered and then slightly expanded, and the air outlet channel is duckbilled; and one end of the air inlet pipe is communicated with the air inlet. The air distribution system comprises a slag discharge port, an inclined air distribution plate and an air cap arranged on the inclined air distribution plate, the air cap is a plurality of air caps, the slag discharge port is gradually arranged upwards towards two sides at intervals, and the inclined air distribution plate is V-shaped. The utility model provides an its hood ventilation hole of circulating fluidized bed boiler tilting grid plate structure easy by debris jam and the inhomogeneous problem of ventilation, the ability of resistance to wear is strong simultaneously, has improved the life of hood.
Description
Technical Field
The utility model relates to a circulating fluidized bed boiler field especially relates to a hood and air distribution system thereof.
Background
The air distribution plate of the prior circulating fluidized bed boiler for material fluidization is mostly in a small mushroom or bell-jar type hood structure. The blast cap realizes the peripheral diffusion of the fluidizing air by opening 6-12 small holes along the circumferential direction, and the bed material boils upwards to realize fluidization. For a conventional coal-fired circulating fluidized bed boiler, the hood can meet the normal fluidization demand, but the circulating fluidized bed boiler has wide fuel adaptability, biomass, solid waste and the like can be used as fuels of the circulating fluidized bed boiler, and due to the fact that biomass contains incombustible impurities such as iron nails, steel wires, screws and the like, holes are formed in the periphery of the fluidization hood, metal foreign matters are easy to drill into fluidization holes and block the holes, ventilation of ventilation holes of the hood is not smooth, and therefore an air distribution system is not fluidized uniformly, materials are agglomerated and coked, fluidization cannot be carried out and furnace shutdown is achieved, huge economic loss can be brought to users during furnace shutdown, and therefore the traditional hood is not suitable for fluidized combustion of fuels such as biomass fuels and solid waste.
In order to prevent the material from caking and coking, the air distribution system of the furnace bed of the current biomass circulating fluidized bed boiler makes the material fluidized more uniformly and discharges slag more smoothly, and an inclined arrangement structure is usually adopted during the design of the air distribution plate. The ventilation holes of the traditional mushroom or bell-type hood structure are arranged around, so that air cannot directly sweep materials for the inclined air distribution plate, and the ventilation holes of the hood are easily blocked, so that the air speed and the air quantity cannot reach the ideal value of actual needs, and the fluidization effect is influenced.
For the inclined air distribution plate structure, the air cap is arranged on the air distribution plate with a certain gradient, air sent from the isostatic chamber at the bottom of the hearth is blown to materials through the air cap, and for the air caps with different heights, due to the difference of the thicknesses of material layers corresponding to the air outlets, the corresponding air resistances are also different, so that the drift current is caused, and the fluidization of the air distribution system is uneven.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model designs an air cap and air distribution system thereof.
The utility model adopts the following technical scheme:
a hood, the hood comprising:
the air cap head comprises a top part, a side part and a bottom part, wherein the top part and the side part enclose an internal cavity, and the bottom part is provided with an air inlet and is communicated with the internal cavity;
the air outlet channel is arranged on the side part and is communicated with the inner cavity; the air outlet channel is firstly slightly tapered and then slightly expanded, and the air outlet channel is duckbilled;
and one end of the air inlet pipe is communicated with the air inlet.
Preferably, the air outlet channel is arranged on one side of the side part, and the air outlet channel is inclined outwards and upwards from the inner cavity.
Preferably, the number of the air outlet channels is one or more, and when the number of the air outlet channels is multiple, the air outlet channels are arranged along the longitudinal direction of the side part at intervals.
Preferably, the internal cavity is a large-volume cavity with smooth transition.
Preferably, the internal cavity comprises an upper cavity and a lower cavity communicated with the upper cavity, the upper cavity is communicated with the air outlet channel, and the lower cavity is communicated with the air inlet.
Preferably, the air inlet pipe comprises a first pipe section and a second pipe section communicated with the first pipe section, the inner diameter of the first pipe section is larger than that of the pipe section, and the first pipe section is communicated with the air inlet.
Preferably, a tapered opening is formed in the connecting transition position of the first pipe section and the second pipe section, and a movable suspensible conical body matched with the tapered opening is arranged in the tapered opening.
Preferably, the first pipe section and the second pipe section, and the first pipe section and the air inlet are both in threaded connection.
The utility model provides a cloth wind system, cloth wind system is in including row cinder notch, tilting grid plate and setting above-mentioned hood on the tilting grid plate, it is a plurality of the hood by arrange the cinder notch and upwards set up to both sides interval gradually, tilting grid plate is the V type.
Preferably, the air outlet channel of each hood is arranged towards the slag discharge port to form two-side opposite blowing.
The utility model has the advantages that: the utility model discloses the air-out passageway of well hood head is "duckbilled" shape of "little convergent back little gradual expansion earlier", can reduce the air outlet size, prevents that jumbo size foreign matter from getting into, and difficult jam ensures that the air-out of air outlet is unobstructed.
Drawings
FIG. 1 is a schematic view of a blast cap;
FIG. 2 is a schematic view of a configuration in which wind caps are distributed in a wind distribution system;
in the figure: 1. the air conditioner comprises a second pipe section, 2, a first pipe section, 3, a hood head, 4, a suspensible conical body, 5, an internal cavity, 6, an air outlet channel, 7, threads, 8, a top, 9, a side portion, 10, a bottom, 11, an air inlet, 12, an upper cavity, 13, a lower cavity, 14, an inclined air distribution plate, 15 and a slag discharge port.
Detailed Description
The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:
example (b): as shown in the attached figure 1, the blast cap comprises a blast cap head 3, an air outlet channel 6 and an air inlet pipe, wherein the blast cap head 3 comprises a top part 8, a side part 9 and a bottom part 10, the top part 8 and the side part 9 enclose an internal cavity 5, and the bottom part 10 is provided with an air inlet 11 communicated with the internal cavity 5; one end of the air inlet pipe is communicated with the air inlet 11; air-out passageway 6 sets up on lateral part 9, and air-out passageway 6 and inside cavity 5 intercommunication, and air-out passageway 6 is the duckbill formula shape that reduces little convergent back little gradually earlier, can reduce the air outlet size, prevents that jumbo size foreign matter from getting into, and difficult jam.
Specifically, the air outlet channel 6 is arranged on one side of the side portion 9, the air outlet channel 6 is inclined outwards and upwards from the inner cavity 5, and the air flow is directionally flowed upwards through the inclination of the one side.
In this embodiment, the number of the air outlet channels 6 is one, so that the blown air flow is concentrated, and the air outlet intensity is high.
In an alternative embodiment, not shown in the drawings, the air outlet channel 6 is multiple, and when the air outlet channel is multiple, the air outlet channels are arranged along the longitudinal direction of the side portion at intervals.
Specifically, the internal cavity 5 is a large-volume cavity in smooth transition, the volume of the large-volume cavity is large, the internal circulation air speed is low, the abrasion to the hood is reduced, the resistance is low, and the service life of the hood is prolonged.
The inner cavity 5 comprises an upper cavity 12 and a lower cavity 13, the upper cavity 12 is communicated with the air outlet channel 6, and the lower cavity 13 of the blast cap head 3 is connected with the first pipe section 2.
The air inlet pipe comprises a first pipe section 2 and a second pipe section 1, the first pipe section 2 is communicated with the second pipe section 1, the inner diameter of the first pipe section 2 is larger than that of the second pipe section 1, and the first pipe section 2 is communicated with the air inlet 11. The transition part of the second pipe section 1 and the first pipe section 2 is provided with a conical opening, and a movable suspensible conical body 4 matched with the conical opening is arranged in the conical opening. The air sent from the isostatic chamber at the bottom of the hearth enters the first pipe section 2 through the second pipe section 1, passes through the suspensible conical body 4, is conveyed to the inner cavity 5, and is blown to the material from the air outlet channel 6. The suspensible cone 4 can balance the wind resistance of each blast cap, bias flow is avoided, the wind quantity can be more uniformly distributed to each ventilation hole, and the blowing wind can enable the material to be uniformly fluidized.
Specifically, the first pipe section 2 is internally provided with a thread 7 in a whole section, the first pipe section 2 is connected with the second pipe section 1 through the thread, the air inlet 11 of the blast cap head 3 is internally provided with a thread, and the first pipe section 2 is connected with the blast cap head 3 through the thread. Therefore, the upper section and the lower section outside the first pipe section 2 are respectively connected with the hood head 3 and the second pipe section 1 through threads, so that the disassembly is convenient, and the replacement, cleaning and maintenance are easy. Meanwhile, the requirements of the blast caps with different heights can be met by changing the length of the second pipe section 1, and the adaptability of the blast cap to the inclined wind distribution plate is improved.
As shown in the attached figure 2, the air distribution system of the air cap shown in the attached figure 1 is used, the air cap is arranged on the inclined air distribution plate 14, the slag discharge port 15 is arranged in the middle of the inclined air distribution plate 14, and the air caps are gradually upwards arranged from the slag discharge port 15 to two sides along the inclined air distribution plate 14 at intervals and are V-shaped. The blast caps on the two sides can blow out fine combustible substances out of the slag discharge port 15, thereby reducing the heat loss caused by incomplete combustion of slag discharge, improving the burnout rate and facilitating the fluidization of small granular substances. Meanwhile, combustion products and impurities are blown and directionally conveyed to the slag discharging port 15 through the blast cap and discharged out of the furnace, so that the directional slag conveying function of the blast cap is realized, the slag discharging port can be prevented from being blocked by the impurities, and the continuous operation time of the boiler can be effectively improved.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.
Claims (10)
1. A hood, said hood comprising:
the air cap head comprises a top part, a side part and a bottom part, wherein the top part and the side part enclose an internal cavity, and the bottom part is provided with an air inlet and is communicated with the internal cavity;
the air outlet channel is arranged on the side part and is communicated with the inner cavity; the air outlet channel is firstly slightly tapered and then slightly expanded, and the air outlet channel is duckbilled;
and one end of the air inlet pipe is communicated with the air inlet.
2. The hood as set forth in claim 1 wherein said outlet channel is disposed on a single side of said side portion, said outlet channel being angled outwardly from said interior cavity.
3. The hood as set forth in claim 2 wherein said outlet air passage is one or more, and when said outlet air passage is plural, said plural outlet air passages are provided at intervals along the longitudinal direction of said side portion.
4. The hood of claim 1 wherein said interior cavity is a rounded large volume cavity.
5. The hood of claim 1 wherein said interior cavity includes an upper cavity and a lower cavity in communication with said upper cavity, said upper cavity being in communication with said outlet air passageway and said lower cavity being in communication with said inlet air opening.
6. The hood according to any of claims 1-5 wherein said air inlet duct comprises a first duct section and a second duct section in communication with said first duct section, said first duct section having an inner diameter greater than an inner diameter of said duct section, said first duct section being in communication with said air inlet.
7. The hood as set forth in claim 6 wherein a tapered mouth is provided at the junction between the first and second pipe sections, said tapered mouth having a movable suspendable cone cooperating therewith.
8. The hood of claim 6 wherein said first pipe section and said second pipe section, said first pipe section and said intake vent are each threadably connected.
9. An air distribution system, characterized in that, the air distribution system includes slag discharge port, tilting air distribution plate, and blast cap set on the tilting air distribution plate, the blast cap is the blast cap of any of claims 1-5, 7, 8, a plurality of the blast caps are set up upward gradually from the slag discharge port to both sides at intervals, the tilting air distribution plate is V-shaped.
10. The air distribution system of claim 9, wherein the air outlet channel of each hood is disposed toward the slag discharge port to form two-side opposite blowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021442055.5U CN212901479U (en) | 2020-07-21 | 2020-07-21 | Hood and air distribution system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021442055.5U CN212901479U (en) | 2020-07-21 | 2020-07-21 | Hood and air distribution system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN212901479U true CN212901479U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021442055.5U Active CN212901479U (en) | 2020-07-21 | 2020-07-21 | Hood and air distribution system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151810A (en) * | 2021-12-18 | 2022-03-08 | 无锡华光环保能源集团股份有限公司 | Air distribution and slag discharge structure for solid waste or biomass boiler |
-
2020
- 2020-07-21 CN CN202021442055.5U patent/CN212901479U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151810A (en) * | 2021-12-18 | 2022-03-08 | 无锡华光环保能源集团股份有限公司 | Air distribution and slag discharge structure for solid waste or biomass boiler |
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Address after: 1216, danionggang Road, Jianggan District, Hangzhou City, Zhejiang Province, 310021 Patentee after: Xizi clean energy equipment manufacturing Co.,Ltd. Address before: 1216, danionggang Road, Jianggan District, Hangzhou City, Zhejiang Province, 310021 Patentee before: HANGZHOU BOILER GROUP Co.,Ltd. |