CN202835341U - Differential rotational flow air distribution device for biomass fuel fluidized bed - Google Patents
Differential rotational flow air distribution device for biomass fuel fluidized bed Download PDFInfo
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- CN202835341U CN202835341U CN 201220328627 CN201220328627U CN202835341U CN 202835341 U CN202835341 U CN 202835341U CN 201220328627 CN201220328627 CN 201220328627 CN 201220328627 U CN201220328627 U CN 201220328627U CN 202835341 U CN202835341 U CN 202835341U
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- distribution plate
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Abstract
The utility model discloses a differential rotational flow air distribution device for a biomass fuel fluidized bed. The differential rotational flow air distribution device comprises an air distribution plate, an outer air chamber and an inner air chamber. The air distribution plate is of a recessed structure, is arranged in the lower portion of a hearth, and is composed of a high-position air distribution plate, an inclined plane air distribution plate and a low-position air distribution plate. A plurality of air caps are arranged on the high-position air distribution plate, the inclined plane air distribution plate and the low-position air distribution plate. The inner air chamber is located under the low-position air distribution plate and is communicated with the air caps of the low-position air distribution plate, and the outer air chamber is located under the high-position air distribution plate and the inclined plane air distribution plate and is communicated with the air caps of both the high-position air distribution plate and the inclined plane air distribution plate. The outer air chamber is separated from the inner air chamber, air enters the hearth through the air chambers and the air caps to form rotational flow air so as to be blown to biomass fuel in the hearth, and a plurality of slagging plates are vertically arranged on the lower plate surface of the low-position air distribution plate. The air distribution device can reinforce circulation of bed materials in the bed and horizontal flow of the bed materials, enables the bed materials to be mixed evenly, and improves combustion efficiency.
Description
Technical field
The novel corollary equipment that relates in a kind of fluid bed of this use, specifically refer to a kind of differential swirl air-distribution device of biomass fuel fluid bed, be applicable to the fluidization direct combustion with biomass materials such as bark, tree root, sugarcane top, bagasse and stalks, can be used for the industries such as biomass direct combustion power generation factory.
Background technology
Biomass direct-combustion boiler mainly contains fire grate grate firing and two kinds of patterns of fluidized bed combustion, and wherein fluid bed has the advantages such as fuel tolerance is good, efficient is high, disposal of pollutants is few, in the biomass direct-fired boiler of extensive use.But easily produce following problems with living beings:
1, the living beings alkali metal containing is many, and easily the slagging scorification bonding is agglomerating, is difficult to fluidisation, simultaneously because biomass density is little, and fluidizing velocity is little, easily causes strength to carry;
2, since the sedimentation of fuel particle group and wall effect institute extremely, Gas-particle Flows forms near the dense cluster of grains in place, furnace wall and moves downward with the rotation shape in the fluid bed, the burner hearth center then is that relatively rare gas-solid two-phase moves upward, produce shuttling movement in the strong stove, because the frictional resistance of furnace wall, cause boiling bed middle part speed larger, and by the low deposition that causes of wind speed around the furnace wall.If still adopt even distributing wind to be easy to cause biomass material depositing mobile variation all around;
3, employing is circumferentially equally distributed mostly for existing blast cap mouth, only has wind upwards in the bed, lacks beam wind, and perturbation is poor.This shows that biomass fluid bed relatively poor to fuel tolerance, traditional cloth wind system is not suitable for firing biomass fuel.
The utility model content
The purpose of this utility model provides a kind of differential swirl air-distribution device of biomass fuel fluid bed, this air-distribution device can be strengthened a lateral flow that material circulates and bed is expected in the bed, make the bed material mix more even, improve efficiency of combustion, this air-distribution device is conducive to macro particles fuel is carried toward the center simultaneously, and easily slagging scorification is discharged into slag-discharging device.
Above-mentioned purpose of the present utility model realizes by the following technical solutions: a kind of differential swirl air-distribution device of biomass fuel fluid bed, it is characterized in that: described air-distribution device comprises air distribution plate, outer air compartment and interior air compartment, described air distribution plate is the concave structure, air distribution plate is built in the bottom of burner hearth, air distribution plate is by high-order air distribution plate, inclined-plane air distribution plate and low level air distribution plate form, wherein, high-order air distribution plate and the equal horizontally set of low level air distribution plate, the oblique lower setting of inclined-plane air distribution plate, and has slanted angle α between the horizontal plane, inclined-plane air distribution plate upper, the lower end is connected with the low level air distribution plate with high-order air distribution plate respectively, high-order air distribution plate, be provided with a plurality of blast caps on inclined-plane air distribution plate and the low level air distribution plate, described interior air compartment be positioned at the low level air distribution plate under, interior air compartment is connected with the blast cap of low level air distribution plate, described outer air compartment be positioned at high-order air distribution plate and inclined-plane air distribution plate under, outer air compartment all is connected with the blast cap of high-order air distribution plate and inclined-plane air distribution plate, isolated between outer air compartment and the interior air compartment, wind enters freeze profile from air compartment and becomes eddy flow wind to blow to the biomass fuel in the burner hearth behind blast cap, the lower face of described low level air distribution plate also is provided with many scum pipes straight down, the upper orifice of scum pipe is connected with burner hearth, and it is outer with deslagging that lower nozzle stretches out stove.
In the utility model, the a plurality of blast caps that arrange on described high-order air distribution plate, inclined-plane air distribution plate and the low level air distribution plate form by the head of straight line pole section and inclination, have angle β between the bar section of blast cap and the head, the bar section of a plurality of blast caps is all perpendicular to residing air distribution plate plate face separately.
The angle β that has between the bar section of described blast cap and the head is in 60～75 ° of scopes.
In the utility model, the layout density of the blast cap on the described high-order air distribution plate is greater than the layout density of the blast cap on the low level air distribution plate, and the blast cap oral pore of the blast cap on high-order air distribution plate footpath is also greater than the blast cap oral pore footpath of the blast cap on the low level air distribution plate.
In the utility model, the setting party of a plurality of blast caps on the described high-order air distribution plate is to identical, and all according to arranging clockwise or counterclockwise, a plurality of blast caps on the high-order air distribution plate are the ranks shape and distribute; The setting party of a plurality of blast caps on the described low level air distribution plate is to also identical, and all according to arranging clockwise or counterclockwise, a plurality of blast caps on the low level air distribution plate are evenly distributed on a plurality of concentric circles.
In the utility model, the slanted angle α between described inclined-plane air distribution plate and the horizontal plane is in 30～45 ° of scopes.
In the utility model, the described scum pipe that arranges straight down is four, and four scum pipes are evenly distributed on the same circumference.
Compared with prior art, air-distribution device of the present utility model mainly is the defective for existing air distribution plate biomass burning, and emphasis solves because the fuel tolerance that biological substance for combustion causes is poor, and deslagging has some setbacks, the problems such as the easy dust stratification of wall.This air-distribution device arranges the bed surface of height at boiler furnace, low level is the high speed bed, and a high position is low speed bed; Bed is spill air distribution plate bottom at a high speed, is provided with scum pipe in the coupled air compartment, and this scum pipe communicates with burner hearth by air distribution plate; A high position is low speed bed, and the inclined-plane air distribution plate below be provided with annular air compartment.Bed is linked to each other by the inclined-plane air distribution plate with low speed bed at a high speed, forms the air distribution plate of fluid bed.Blast cap that air distribution plate uses is unidirectional opening, the oblique lower setting of blast cap mouth.High-order bed blast cap arranges that density ratio low level bed layout density is large, and high-order bed blast cap mouth aperture ratio low level bed blast cap oral pore footpath is large.The all rounded distributions of the blast cap mouth of low level bed blast cap.The non-homogeneous differential cloth wind energy of high sunken bed enough increases limit wall air quantity, and the particle deposition of avoiding wall effect to cause forms top-down interior circular flow; Be conducive to the inclined-plane air distribution plate under the blast cap mouth is oblique bulky grain is carried toward the center, have stronger break and deslagging ability; The formed swirling eddy of the rounded layout of blast cap mouth makes fuel be difficult for heap group, strengthens mixing of materials, makes bed temperature even, flameholding.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the overall structure schematic diagram of the utility model air-distribution device;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is vertical sectional structure schematic diagram of the Apoplexy cap of the utility model air-distribution device.
Description of reference numerals
1, burner hearth; 2, high-order air distribution plate; 3, outer air compartment; 4, interior air compartment; 5, scum pipe;
6, low level air distribution plate; 7, inclined-plane air distribution plate; 81, blast cap; 82, blast cap; 83, blast cap
The specific embodiment
The differential swirl air-distribution device of a kind of biomass fuel fluid bed as shown in Figure 1 to Figure 3, this air-distribution device comprises air distribution plate, outer air compartment 3 and interior air compartment 4, air-distribution device is arranged in the boiler furnace in use, the air distribution plate of air-distribution device is the concave structure, air distribution plate is built in the bottom of burner hearth 1, air distribution plate is by high-order air distribution plate 2, inclined-plane air distribution plate 7 and low level air distribution plate 6 form, wherein, high-order air distribution plate 2 and low level air distribution plate 6 equal horizontally sets, the 7 oblique lower settings of inclined-plane air distribution plate, and the slanted angle α that has 45 ° between the horizontal plane, inclined-plane air distribution plate 7 upper, the lower end is connected with low level air distribution plate 6 with high-order air distribution plate 2 respectively, high-order air distribution plate 2, be provided with a plurality of blast caps 81 on inclined-plane air distribution plate 7 and the low level air distribution plate 6,82,83, interior air compartment 4 be positioned at low level air distribution plate 6 under, interior air compartment 4 is connected with the blast cap 83 of low level air distribution plate 6, outer air compartment 3 be positioned at high-order air distribution plate 2 and inclined-plane air distribution plate 7 under, the blast cap 81 of outer air compartment 3 and high-order air distribution plate 2 and inclined-plane air distribution plate 7,82 all are connected, isolated between outer air compartment 3 and the interior air compartment 4, wind enters burner hearth 1 interior formation eddy flow wind to blow to the biomass fuel in the burner hearth from air compartment behind blast cap, the lower face of low level air distribution plate 6 also is provided with four scum pipes 5 straight down, four scum pipes 5 all are positioned at the regional extent of air compartment 4, four scum pipes 5 are evenly distributed on the same circumference, the upper orifice of scum pipe 5 is connected with burner hearth 1, and it is outer with deslagging that lower nozzle stretches out stove.
In the present embodiment, the a plurality of blast caps 81,82 that arrange on high-order air distribution plate 2, inclined-plane air distribution plate 7 and the low level air distribution plate 6,83 heads by straight line pole section and inclination form, the cap structure that arranges on each air distribution plate is identical, just size is variant, as shown in Figure 3, the angle β that has 75 ° between the bar section of the blast cap 81 on the high-order air distribution plate 2 and the head, the structure of the blast cap 82 of inclined-plane air distribution plate 7 and the blast cap 83 of low level air distribution plate 6 also is so, and a plurality of blast caps 81,82,83 bar section are all perpendicular to residing air distribution plate plate face separately.
The layout density of the blast cap 81 on the high-order air distribution plate is greater than the layout density of the blast cap 83 on the low level air distribution plate, and the blast cap oral pore of the blast cap on the high-order air distribution plate 81 footpath is also greater than the blast cap oral pore footpath of the blast cap 83 on the low level air distribution plate.High-order air distribution plate 2 blast cap density are large and blast cap oral pore footpath is large, and air quantity is larger, can blow afloat the material that is deposited on the limit wall or carry toward the air distribution plate center, avoid because the particle deposition that wall effect causes.Because the blast cap oral pore of high-order air distribution plate 2 footpath is large, wind speed is less, forms low speed bed; Low level air distribution plate 6 apertures are little, wind speed is large, form at a high speed bed, biomass fuel is in low level air distribution plate 6 fluidisation upwards at a high speed like this, form low-pressure area, and high-order bed 2 is larger at the pressure of limit wall formation because speed is little, biomass granule fuel can be owing to carrying toward low level air distribution plate 6 under the effect of pressure differential, like this can be in bed the formation center make progress and downward interior circulation all around; The blast cap mouth of inclined-plane air distribution plate 7 also is conducive to towards the air distribution plate center large granular materials around being deposited on is discharged into the low level air distribution plate smoothly.
The setting party of a plurality of blast caps 81 on the high-order air distribution plate 2 is to identical, and all according to arranging clockwise or counterclockwise, a plurality of blast caps 81 on the high-order air distribution plate 2 are the ranks shape and distribute; The setting party of a plurality of blast caps 83 on the low level air distribution plate 6 is to also identical, all according to arranging clockwise or counterclockwise, a plurality of blast caps 83 on the low level air distribution plate 6 are evenly distributed on a plurality of concentric circles, and the blast cap mouth homocline of blast cap is downward, so both can form swirl air-distribution, strengthen the horizontal disturbance of material on the air distribution plate, also can avoid the blast cap mouth directly to blow the front blast cap and shorten service life of blast cap.
Conversion as the present embodiment, slanted angle α between inclined-plane air distribution plate 7 and the horizontal plane is value in 30～45 ° of scopes according to actual needs, and the angle β that has between the bar section of blast cap and the head is value in 60～75 ° of scopes according to actual needs.
Above-described embodiment of the present utility model is not the restriction to the utility model protection domain; embodiment of the present utility model is not limited to this; according to foregoing of the present utility model; ordinary skill knowledge and customary means according to this area; do not breaking away under the above-mentioned basic fundamental thought of the utility model prerequisite; modification, replacement or the change of other various ways that the utility model said structure is made all drop within the protection domain of the present utility model.
Claims (7)
1. the differential swirl air-distribution device of a biomass fuel fluid bed, it is characterized in that: described air-distribution device comprises air distribution plate, outer air compartment (3) and interior air compartment (4), described air distribution plate is the concave structure, air distribution plate is built in the bottom of burner hearth (1), air distribution plate is by high-order air distribution plate (2), inclined-plane air distribution plate (7) and low level air distribution plate (6) form, wherein, high-order air distribution plate (2) and low level air distribution plate (6) be horizontally set all, the oblique lower setting of inclined-plane air distribution plate (7), and has slanted angle α between the horizontal plane, inclined-plane air distribution plate (7) upper, the lower end is connected with low level air distribution plate (6) with high-order air distribution plate (2) respectively, high-order air distribution plate (2), be provided with a plurality of blast caps (81 on inclined-plane air distribution plate (7) and the low level air distribution plate (6), 82,83), described interior air compartment (4) be positioned at low level air distribution plate (6) under, interior air compartment (4) is connected with the blast cap (83) of low level air distribution plate (6), described outer air compartment (3) be positioned at high-order air distribution plate (2) and inclined-plane air distribution plate (7) under, the blast cap (81 of outer air compartment (3) and high-order air distribution plate (2) and inclined-plane air distribution plate (7), 82) all be connected, isolated between outer air compartment (3) and the interior air compartment (4), wind enters behind blast cap from air compartment and forms eddy flow wind in the burner hearth (1) to blow to the biomass fuel in the burner hearth, the lower face of described low level air distribution plate (6) also is provided with many scum pipes (5) straight down, the upper orifice of scum pipe (5) is connected with burner hearth (1), and it is outer with deslagging that lower nozzle stretches out stove.
2. the differential swirl air-distribution device of biomass fuel fluid bed according to claim 1, it is characterized in that: the upper a plurality of blast caps (81,82,83) that arrange of described high-order air distribution plate (2), inclined-plane air distribution plate (7) and low level air distribution plate (6) form by the head of straight line pole section and inclination, have angle β between the bar section of blast cap and the head, the bar section of a plurality of blast caps (81,82,83) is all perpendicular to residing air distribution plate plate face separately.
3. the differential swirl air-distribution device of biomass fuel fluid bed according to claim 2, it is characterized in that: the angle β that has between the bar section of described blast cap and the head is in 60～75 ° of scopes.
4. the differential swirl air-distribution device of biomass fuel fluid bed according to claim 1, it is characterized in that: the layout density of the blast cap (81) on the described high-order air distribution plate is greater than the layout density of the blast cap on the low level air distribution plate (83), and the blast cap oral pore of the blast cap on the high-order air distribution plate (81) footpath is also greater than the blast cap oral pore footpath of the blast cap on the low level air distribution plate (83).
5. the differential swirl air-distribution device of biomass fuel fluid bed according to claim 1, it is characterized in that: the setting party of a plurality of blast caps (81) on the described high-order air distribution plate (2) is to identical, all according to arranging clockwise or counterclockwise, a plurality of blast caps (81) on the high-order air distribution plate (2) are the ranks shape and distribute; The setting party of a plurality of blast caps (83) on the described low level air distribution plate (6) is to also identical, and all according to arranging clockwise or counterclockwise, a plurality of blast caps (83) on the low level air distribution plate (6) are evenly distributed on a plurality of concentric circles.
6. the differential swirl air-distribution device of biomass fuel fluid bed according to claim 1, it is characterized in that: the slanted angle α between described inclined-plane air distribution plate (7) and the horizontal plane is in 30～45 ° of scopes.
7. the differential swirl air-distribution device of biomass fuel fluid bed according to claim 1 is characterized in that: the described scum pipe (5) that arranges straight down is four, and four scum pipes (5) are evenly distributed on the same circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220328627 CN202835341U (en) | 2012-07-06 | 2012-07-06 | Differential rotational flow air distribution device for biomass fuel fluidized bed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220328627 CN202835341U (en) | 2012-07-06 | 2012-07-06 | Differential rotational flow air distribution device for biomass fuel fluidized bed |
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| CN202835341U true CN202835341U (en) | 2013-03-27 |
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| CN 201220328627 Expired - Lifetime CN202835341U (en) | 2012-07-06 | 2012-07-06 | Differential rotational flow air distribution device for biomass fuel fluidized bed |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016346A (en) * | 2016-05-28 | 2016-10-12 | 许昌东方热力有限公司 | High-efficiency automatic boiler air volume adjusting device |
| CN106040107A (en) * | 2016-07-04 | 2016-10-26 | 茂名重力石化机械制造有限公司 | Concave flow distribution plate and reactor with same |
| CN106287686A (en) * | 2016-09-23 | 2017-01-04 | 杭州锅炉集团股份有限公司 | Biomass recirculating fluidized bed boiler slag-draining device |
| CN107448931A (en) * | 2017-08-10 | 2017-12-08 | 北京亚高科能源科技有限公司 | A kind of whirl wind gasified bed with turbulent structure |
| CN111237745A (en) * | 2020-01-13 | 2020-06-05 | 洛阳建材建筑设计研究院有限公司 | Non-uniform air distribution fluidized bed and non-uniform air distribution fluidized bed boiling decomposition device |
-
2012
- 2012-07-06 CN CN 201220328627 patent/CN202835341U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016346A (en) * | 2016-05-28 | 2016-10-12 | 许昌东方热力有限公司 | High-efficiency automatic boiler air volume adjusting device |
| CN106040107A (en) * | 2016-07-04 | 2016-10-26 | 茂名重力石化机械制造有限公司 | Concave flow distribution plate and reactor with same |
| CN106040107B (en) * | 2016-07-04 | 2019-02-19 | 茂名重力石化装备股份公司 | A kind of spill airflow-distribution board and its reactor |
| CN106287686A (en) * | 2016-09-23 | 2017-01-04 | 杭州锅炉集团股份有限公司 | Biomass recirculating fluidized bed boiler slag-draining device |
| CN106287686B (en) * | 2016-09-23 | 2019-04-05 | 杭州锅炉集团股份有限公司 | Biomass recirculating fluidized bed boiler slag-draining device |
| CN107448931A (en) * | 2017-08-10 | 2017-12-08 | 北京亚高科能源科技有限公司 | A kind of whirl wind gasified bed with turbulent structure |
| CN107448931B (en) * | 2017-08-10 | 2019-02-22 | 北京一亚高科能源科技有限公司 | A kind of whirl wind gasified bed with turbulent structure |
| CN111237745A (en) * | 2020-01-13 | 2020-06-05 | 洛阳建材建筑设计研究院有限公司 | Non-uniform air distribution fluidized bed and non-uniform air distribution fluidized bed boiling decomposition device |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20130327 |