CN210861066U - Boiler returning charge equipment - Google Patents
Boiler returning charge equipment Download PDFInfo
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- CN210861066U CN210861066U CN201721763908.3U CN201721763908U CN210861066U CN 210861066 U CN210861066 U CN 210861066U CN 201721763908 U CN201721763908 U CN 201721763908U CN 210861066 U CN210861066 U CN 210861066U
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Abstract
The utility model discloses a boiler returning charge equipment, its technical scheme's main points are: the air distribution device comprises a return box provided with a feeding pipe and a return pipe, wherein the feeding pipe, the return pipe and the return box are communicated, an air distribution plate is horizontally arranged in the return box, and a plurality of air caps are arranged on the air distribution plate; an air outlet chamber is arranged below the air distribution plate, a partition plate matched with the cross section of the air outlet chamber is arranged in the air outlet chamber, and the air outlet chamber is horizontally divided into an adjacent material returning chamber and a material suspending chamber by the partition plate; the material returning air chamber is arranged close to the material returning pipe, and the material suspending air chamber is arranged close to the material feeding pipe; a return air inlet pipe is communicated with the return air chamber, and a suspension air inlet pipe is communicated with the suspension air chamber; the return air inlet pipe and the suspension air inlet pipe are both connected with a flow meter and an air supply device; the single air outlet chamber is divided into the independent suspension air chamber and the independent return air chamber, so that the materials are suspended under the action of suspension air in the suspension air chamber and then enter the return pipe under the action of return air in the return air chamber, and the device has the advantage of convenience in operation.
Description
Technical Field
The utility model relates to a circulating fluidized bed boiler technical field, in particular to boiler returning charge equipment.
Background
The circulating fluidized bed boiler has the advantages of wide fuel application range, high in-furnace desulfurization efficiency, small in nitrogen oxide discharge amount, high in combustion efficiency, large in load regulation ratio, comprehensively utilized ash and the like, and is widely applied to the fields of power station boilers, industrial boilers and the like.
The boiler material returning equipment in the circulating fluidized bed boiler is an important composition structure, and high-temperature materials separated by the boiler material returning equipment and entering a material returning device are fluidized and flow into a hearth under the action of air pressure to realize circulating combustion.
Chinese patent with grant publication No. CN105066120A and application date of 2015, 11 and 18 discloses a material returning device of a circulating fluidized bed boiler, which comprises a material inlet and a material returning port, which are communicated with each other, wherein the material inlet is located below a separator, fly ash material separated by the separator enters the material returning device from the material inlet, the material returning port is communicated with a furnace chamber, an air distribution plate is arranged in the material returning device, a plurality of ventilated air caps are arranged on the air distribution plate, a phase dispersing area is formed at one side close to the material inlet in a closed space of the material returning device, and a dense phase area is formed at one side close to the material returning port; the blast cap in the phase-dredging area conveys loosening wind to the fly ash material to loosen the fly ash material; the return air is conveyed by the hood in the dense-phase area, and the fly ash material is conveyed into the hearth for combustion.
The prior art has the defects that a sparse phase area and a dense phase area can be formed on the air distribution plate only by adjusting the number, the position and the size of the air caps during use, the operation is complex, and the working efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a boiler returning charge equipment separates into independent suspension material plenum and returning charge plenum through single air-out chamber for the material suspends under the effect of the suspension wind in the suspension material plenum, then gets into the furnace burning under the returning charge wind effect in the returning charge plenum, has convenient operation's advantage.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the boiler material returning equipment comprises a material returning box provided with a material feeding pipe and a material returning pipe, wherein the material feeding pipe, the material returning pipe and the material returning box are communicated, an air distribution plate horizontally arranged is arranged in the material returning box, and a plurality of air caps are arranged on the air distribution plate; an air outlet chamber is arranged below the air distribution plate, a partition plate matched with the cross section of the air outlet chamber is arranged in the air outlet chamber, and the air outlet chamber is horizontally divided into an adjacent material returning chamber and a material suspending chamber by the partition plate; the material returning air chamber is arranged close to the material returning pipe, and the material suspending air chamber is arranged close to the material feeding pipe; the material returning air chamber is communicated with a material returning air inlet pipe, and the material suspending air chamber is communicated with a material suspending air inlet pipe; the return material inlet pipe and the suspension material inlet pipe are both connected with a flow meter and an air supply device; the feeding pipe is arranged at the top of the return box, and the return pipe is arranged obliquely downwards; the top of the material returning box is provided with a first blanking guide plate, the first blanking guide plate is arranged obliquely downwards, and the oblique direction of the first blanking guide plate points to the other side of the material feeding pipe from one side of the material feeding pipe; the direction of the bottom of the first blanking guide plate deviates from the material returning air chamber; a second blanking guide plate is arranged on the side wall of the return box corresponding to the position pointed by the first blanking guide plate, and the second blanking guide plate is obliquely arranged from the side wall of the return box to the direction close to the suspension air chamber; the bottom of the first blanking guide plate is provided with an arc transition end, and the radian of the arc transition end is downward; the number of the blast caps on the position, corresponding to the material returning air chamber, of the air distribution plate is more than that of the blast caps on the position, corresponding to the material suspending air chamber, of the air distribution plate.
By adopting the technical scheme, when in use, the air supply devices on the return air inlet pipe and the suspension air inlet pipe are opened, and the air flow forms a relatively dense phase area and a relatively sparse phase area in the return air chamber and the suspension air chamber respectively by adjusting the air flow rate of the air supply devices, so that the adjusting process is convenient and simple. The material entering from the feeding pipe is suspended in the material returning box under the action of wind power in the material suspending wind chamber; then is blown into the return pipe under the action of wind power in the return air chamber. The flowmeters of the return material inlet pipe and the suspension material inlet pipe can measure the internal air quantity, so that the difference of the air speeds of the return material inlet pipe and the suspension material inlet pipe is compared to adjust.
The material return pipe is arranged obliquely downwards, so that materials in the material return pipe can fall into the material return box by fully utilizing the gravity of the materials, the falling of the materials is accelerated, and the material return efficiency is improved. The material in the material returning pipe can be directly conveyed to the hearth by utilizing the gravity of wind power and the material due to the inclined downward arrangement of the material returning pipe, and the condition that the wind power impacts the inner wall of the material returning pipe when entering the material returning pipe and is greatly lost due to the fact that the material returning pipe is vertical is reduced.
After the materials fall down from the blanking pipe, the materials slide down to the second blanking guide plate along the first blanking guide plate under the guide action of the first blanking guide plate, and finally fall to the position, corresponding to the material suspension air chamber, on the air distribution plate. The first blanking guide plate can separate the feeding pipe from the return pipe, so that the situation that the materials move disorderly under the action of air flow in the return box after falling is reduced; the second unloading deflector directly leads the material to the position that corresponds the hanging wind chamber in the return bin, reduces the material and piles up the unable condition that gets into the return tube in the corner.
The setting of arc transition end for the air current in the return box can the rounding off flow on the arc transition end, reduces the condition of indiscriminate flow, reduces the material simultaneously and gets into the condition on the motion in-process attached to first unloading deflector of return pipe after being suspended.
The air distributing plate is provided with air caps with different numbers at positions corresponding to the material returning air chamber and the material suspending air chamber, so that the air output in the material returning air chamber can be increased, the dense phase and the sparse phase in the material returning box can be distinguished more obviously, and the speed of blowing the material into the material returning pipe is increased.
More preferably: the air distribution plate is connected with a main ash discharge pipe, and the main ash discharge pipe is vertically arranged downwards.
Adopt above-mentioned technical scheme, the quality that has some materials is too big and not suspend in the returning charge incasement, is called the ash that falls with these materials, and the ash that falls can be carried out along with main ash discharge pipe, reduces the condition that the hood was blocked up to the ash that falls.
More preferably: and the bottoms of the material returning air chamber and the material suspending air chamber are communicated with an ash separating and discharging pipe.
Adopt above-mentioned technical scheme, in the returning charge incasement have partly fall the ash and fall into the wind chamber from the hood, the wind ash discharge pipe discharges these ash that fall, reduces the ash that falls in the wind chamber and gets into the condition that the hood is blockked up the hood again under the wind-force effect.
More preferably: and ash guide hoppers are arranged at the tops of the main ash discharge pipe and the branch ash discharge pipes.
By adopting the technical scheme, the ash guide hopper can guide the falling ash close to the main ash discharge pipe and the branch ash discharge pipe, so that the falling ash is collected and discharged.
To sum up, the utility model discloses following beneficial effect has:
1. the single air outlet chamber is divided into the independent suspension air chamber and the independent return air chamber, and the independent air supply device is arranged, so that the materials are suspended under the action of suspension air in the suspension air chamber and then enter the hearth for combustion through the return pipe under the action of return air in the return air chamber, and the air-conditioning device has the advantage of convenience in operation;
2. through setting up main ash discharge pipe and branch ash discharge pipe and discharge the ash that falls in the return bin and the bellows, reduce the ash that falls and to the influence of returning charge effect, reach the effect that the ash that reduces to fall blocks up the hood simultaneously.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment.
In the figure, 1, a material returning box; 11. a feeding pipe; 12. a material returning pipe; 13. a wind distribution plate; 131. a hood; 2. an air outlet chamber; 20. a partition plate; 21. a suspension air chamber; 211. the suspension material enters an air pipe; 22. a material returning air chamber; 221. returning the material to an air pipe; 3. an air supply device; 4. a flow meter; 5. a first blanking guide plate; 51. an arc-shaped transition end; 6. a second blanking guide plate; 7. a main ash discharge pipe; 8. Ash separating and discharging pipes; 81. a slag cooler; 82. a slag collecting pipe; 821. opening and closing a valve; 822. a slag collection box; 8221. replacing the box; 9. a dust guide hopper; 10. and (4) discharging ash from the slope.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): a boiler material returning device is shown in figure 1 and comprises a material returning box 1 communicated with a material feeding pipe 11 and a material returning pipe 12, wherein the material feeding pipe 11 is located at the position, close to the right, of the top of the material returning pipe 12, the material returning pipe 12 is located on the right side wall of the material returning box 1, and the material returning pipe 12 is arranged obliquely downwards. The horizontal air distribution plate 13 is additionally arranged in the return box 1, a plurality of air caps 131 are arranged on the air distribution plate 13, and the number of the air caps 131 on the left side of the air distribution plate 13 is more than that on the right side. An air outlet chamber 2 is arranged below the air distribution plate 13, and the air outlet chamber 2 is communicated with an air inlet pipe with one end connected to the air supply device 3. When the material return device is used, materials fall into the material return box 1 from the feeding pipe 11, enter the material return pipe 12 under the action of wind force blown upwards by the wind caps 131 on the wind distribution plate 13, and the material return pipe 12 is communicated with a hearth (not shown in the figure).
In order to adjust the wind power in the material returning box 1, the air outlet chamber 2 is divided into a suspension air chamber 21 and a material returning air chamber 22 with the same size by a vertically arranged partition plate 20, and the material returning air chamber 22 is arranged close to the material returning pipe 12. The air inlet pipe comprises a suspension air inlet pipe 211 arranged on the suspension air chamber 21 and a return air inlet pipe 221 arranged on the return air chamber 22. The suspended material inlet pipe 211 and the return material inlet pipe 221 are respectively connected with an air supply device 3 which is independently arranged, and one ends of the suspended material inlet pipe 211 and the return material inlet pipe 221, which are close to the air outlet chamber 2, are respectively provided with a flow meter 4 for detecting the air speed. When the device is used, the positions of the air distribution plate 13 corresponding to the suspension air chamber 21 and the return air chamber 22 are respectively formed into a phase-sparse region and a dense-phase region by adjusting the two air supply devices 3.
In order to facilitate that the material falling from the feeding pipe 11 can more smoothly fall on the air distribution plate 13 and simultaneously reduce the mutual interference of the sparse phase region and the dense phase region on the air distribution plate 13, a first blanking guide plate 5 and a second blanking guide plate 6 are arranged in the return box 1. One end of the first blanking guide plate 5 is arranged corresponding to the left side of the feeding pipe 11, the other end of the first blanking guide plate is arranged in a cantilever mode and points to the position of the cantilever air chamber 21, and an arc-shaped transition end 51 is arranged at one cantilever end of the first blanking guide plate 5; the second blanking guide plate 6 is positioned on the inner wall on the right side of the material return box 1, and the inclined surface of the second blanking guide plate 6 is arranged corresponding to one end of the first blanking guide plate 5 in an overhanging mode. When the material falls from the feeding pipe 11, the material firstly slides downwards under the guiding action of the first blanking guide plate 5 and falls onto the second blanking guide plate 6, and then the material slides along the second blanking guide plate 6 to the position, corresponding to the material hanging air chamber 21, on the air distribution plate 13.
In order to facilitate accumulation of some falling ash with large mass in the air outlet chamber 2 in the material returning box 1, a main ash discharge pipe 7 and a branch ash discharge pipe 8 are respectively communicated in the material returning box 1 and the air outlet chamber 2. Wherein, the main ash discharging pipe 7 is positioned on the air distribution plate 13 at a position corresponding to the suspension air chamber 21; the ash separating and discharging pipes 8 are positioned on the bottom walls of the suspension air chamber 21 and the return air chamber 22. In order to facilitate the falling of the falling ash, ash guide hoppers 9 are arranged at the tops of the main ash discharge pipe 7 and the branch ash discharge pipes 8; and the bottom walls of the suspension air chamber 21 and the return air chamber 22 where the ash separating and discharging pipe 8 is located are both provided with an ash discharging slope 10, and the ash separating and discharging pipe 8 is located at the lowest position of the ash discharging slope 10.
In order to reduce the environmental pollution caused by ash falling, the two ash separating and discharging pipes 8 are communicated with the main ash discharging pipe 7, the bottom of the main ash discharging pipe 7 is communicated with the slag cooler 81, and the slag cooler 81 is communicated with the slag collecting box 822 through the slag collecting pipe 82. The slag collecting pipe 82 is connected to the top of the slag collecting box 822, and the slag collecting pipe 82 is provided with an opening and closing valve 821. The slag collection box 822 is hollow and has an opening at one side, and the slag collection box 822 is connected with a replacement box 8221 in a sliding manner. In use, the falling ash falls from the slag cooler 81 through the slag collecting pipe 82 into the replacement tank 8221, the open/close valve 821 is closed when the falling ash in the replacement tank 8221 is full, and the replacement tank 8221 is taken out from the side of the upper opening of the slag collecting tank 822 for replacement.
The utility model discloses a use as follows, opens the air supply arrangement 3 of connecting on hanging material income tuber pipe 211 and returning charge income tuber pipe 221 to adjust air supply arrangement 3's air output, make the position that corresponds hanging material plenum 21 and returning charge plenum 22 on the air distributor 13 form respectively and dredge looks district and dense district. The material enters the material returning box 1 from the material inlet pipe 11, falls to the position of the phase dredging area under the guiding action of the first blanking guide plate 5 and the second blanking guide plate 6, and is suspended in the material returning box 1 under the wind force of the suspension wind chamber 21 to the wind cap 131. The material then moves slowly and is blown into the return pipe 12 by the wind in the dense phase zone. Meanwhile, part of the falling ash with large mass is transported into the slag cooler 81 below through the main ash discharge pipe 7 on the air distribution plate 13, and part of the falling ash entering the air outlet chamber 2 through the air cap 131 moves into the ash separation discharge pipe 8 along the ash discharge slope 10, and finally converges in the main ash discharge pipe 7 and falls into the slag cooler 81. After the ash is cooled by the slag cooler 81, the ash is dropped into the replacement tank 8221 in the slag collection tank 822 through the slag collection pipe 82, and the replacement tank 8221 is taken out and replaced by closing the open/close valve 821 when the ash in the replacement tank 8221 is fully collected.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws within the scope of the present invention.
Claims (4)
1. The boiler material returning equipment comprises a material returning box (1) provided with a material feeding pipe (11) and a material returning pipe (12), wherein the material feeding pipe (11), the material returning pipe (12) and the material returning box (1) are communicated, an air distribution plate (13) horizontally arranged is arranged in the material returning box (1), and a plurality of air hoods (131) are arranged on the air distribution plate (13); an air outlet chamber (2) is arranged below the air distribution plate (13), a partition plate (20) matched with the cross section of the air outlet chamber (2) is arranged in the air outlet chamber (2), and the air outlet chamber (2) is horizontally divided into an adjacent material returning chamber (22) and a material suspending chamber (21) by the partition plate (20); the material returning air chamber (22) is arranged close to the material returning pipe (12), and the material suspending air chamber (21) is arranged close to the material feeding pipe (11); a return air inlet pipe (221) is communicated with the return air chamber (22), and a suspension air inlet pipe (211) is communicated with the suspension air chamber (21); the return air inlet pipe (221) and the suspension air inlet pipe (211) are both connected with a flow meter (4) and an air supply device (3); the feeding pipe (11) is arranged at the top of the return box (1), and the return pipe (12) is arranged obliquely downwards; the feeding device is characterized in that a first blanking guide plate (5) is arranged at the top of the return box (1), the first blanking guide plate (5) is arranged obliquely downwards, and the oblique direction of the first blanking guide plate (5) points to the other side of the feeding pipe (11) from one side of the feeding pipe (11); the bottom of the first blanking guide plate (5) points away from the return air chamber (22); a second blanking guide plate (6) is arranged on the side wall of the return box (1) corresponding to the position pointed by the first blanking guide plate (5), and the second blanking guide plate (6) is obliquely arranged from the side wall of the return box (1) to the direction close to the suspension air chamber (21); an arc transition end (51) is arranged at the bottom of the first blanking guide plate (5), and the radian of the arc transition end (51) is downward; the number of the blast caps (131) on the position, corresponding to the material returning wind chamber (22), of the blast distribution plate (13) is more than that of the blast caps (131) on the position, corresponding to the material suspending wind chamber (21), of the blast distribution plate (13).
2. The boiler return material equipment according to claim 1, characterized in that a main ash discharge pipe (7) is connected to the air distribution plate (13), and the main ash discharge pipe (7) is vertically arranged downwards.
3. The boiler return material equipment according to claim 2, characterized in that the bottom of the return material plenum (22) and the suspension plenum (21) are communicated with ash separating and discharging pipes (8).
4. The boiler return equipment according to claim 3, characterized in that the top of the main ash discharge pipe (7) and the ash discharge branch pipe (8) is provided with an ash guide hopper (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721763908.3U CN210861066U (en) | 2017-12-16 | 2017-12-16 | Boiler returning charge equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721763908.3U CN210861066U (en) | 2017-12-16 | 2017-12-16 | Boiler returning charge equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210861066U true CN210861066U (en) | 2020-06-26 |
Family
ID=71307726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721763908.3U Active CN210861066U (en) | 2017-12-16 | 2017-12-16 | Boiler returning charge equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210861066U (en) |
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2017
- 2017-12-16 CN CN201721763908.3U patent/CN210861066U/en active Active
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