CN205782887U - A kind of air-cushion type coal sorting feeder - Google Patents
A kind of air-cushion type coal sorting feeder Download PDFInfo
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- CN205782887U CN205782887U CN201620543962.6U CN201620543962U CN205782887U CN 205782887 U CN205782887 U CN 205782887U CN 201620543962 U CN201620543962 U CN 201620543962U CN 205782887 U CN205782887 U CN 205782887U
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- coal
- broadcast
- spout
- feeding tube
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Abstract
This utility model relates to Sector of Cfb Boilers, it is specifically related to a kind of air-cushion type coal sorting feeder, take over broadcasting coal including coal-feeding tube, described coal-feeding tube tilts to be connected on furnace wall cooling, described broadcast coal adapter two ends be respectively connection hot blast or high-pressure blast give a dinner for a visitor from afar mouth and connect coal-feeding tube broadcast coal spout, described broadcast coal adapter and connect with coal-feeding tube and be connected on furnace wall cooling by broadcasting coal spout, the described angle broadcasting coal spout and horizontal direction is α, α is in the range of 10 degree ~ 35 degree, described coal-feeding tube is β with the angle of horizontal direction, β is in the range of 10 degree ~ 70 degree, and β is more than α；The described cross section broadcasting coal spout is middle hollow joint body structure wide at the top and narrow at the bottom, described in broadcast the cross-sectional area of coal spout less than the cross-sectional area of mouth of giving a dinner for a visitor from afar.This utility model utilizes the high-pressure spray effect broadcasting coal spout, strengthens rigidity and the width of jet, broadcasts coal effect good, and fluidisation uniformly, improves fuel availability, avoids local, coal-feeding tube bottom close-burning, improve boiler at low load service ability.
Description
Technical field
This utility model relates to Sector of Cfb Boilers, particularly relates to a kind of air-cushion type coal sorting feeder.
Background technology
CFBB has a high reliability because of it, high stability, high availability, splendid environmental protection characteristic and
Fuel tolerance widely, the particularly adaptability to inferior fuel so that it is increasingly get more and more people's extensive concerning.In order to prolong
The long fuel time of staying in burner hearth, improving efficiency of combustion, usual coal supply point is generally located on the emulsion zone of lower furnace portion.By
Few in the coal supply point of CFBB, there is certain inhomogeneities in coal supply, for preventing local coal charge from piling up, increases coal charge
Burning time in burner hearth, improve efficiency of combustion, typically the handing-over position at burner hearth Yu coal-feeding tube and strength coal sorting feeder be set,
I.e. by strength coal sorting feeder, wind is introduced burner hearth, to uniformly being broadcast out by coal charge, make coal charge fully burn in burner hearth.
The structure of existing strength coal sorting feeder is as it is shown in figure 1, this strength coal sorting feeder is mainly at coal-feeding tube bottom and stove
Thorax handing-over position arranges a pipeline being parallel to each other with coal-feeding tube as coal spread wind pipe, the air intake vent of coal spread wind pipe and boiler
Secondary hot-air is connected, and the spray wind direction of coal spread wind pipe is positioned at the lower section parallel with coal-feeding tube of coal-feeding tube outlet, passes through coal spread wind
Jet action coal is broadcast out, prevent fuel local accumulation near coal-feeding tube, it is to avoid impact fluidisation and cause local coking.But
This strength coal sorting feeder has the disadvantages that coal spread wind pipe uses single small diameter pipeline, only to falling at its purging region internal combustion
Material blows off；Meanwhile, coal spread wind takes from secondary hot-air, and the blast of secondary hot-air is on the low side, adds the diameter of coal spread wind pipe
Less than normal, flow resistance increases, and causes coal spread wind momentum not enough, and the effect of sowing fuel is faint；Use coal spread wind pipe and coal-feeding tube
The version being arranged in parallel, the jet direction making coal spread wind is consistent with the falling direction of coal supply, on the one hand causes and broadcasts coal at horizontal stroke
The effect of sowing on cross section is faint, on the other hand also promotes the bulky grain rapid subsidence in coal supply, is unfavorable for the after-flame of fuel；Broadcast
The wind regime of coal wind takes from secondary hot-air so that overfire air fan runs without interruption, and causes energy waste；Because broadcasting coal weak effect, limit
The underrun ability of boiler.
In sum, existing strength coal sorting feeder easily occurs coal-feeding tube bottom fluidisation bad, causes local coking, particularly
Underrun operating mode, fluidisation weakens, and coal supply inequality is more easy to cause bed temperature deviation excessive or slagging failure.For improving this work
Condition, runs frequently with bigger primary air flow in actual motion, makes bed be in complete fluidized state, affects because air feed is superfluous
Burn and cause hearth abrasion, being unfavorable for safe and stable operation, also limit the underrun performance of boiler.
Utility model content
The purpose of this utility model is the problem for above-mentioned existence, it is provided that a kind of fluidisation fully, improve fuel availability,
Avoid fuel local close-burning, the air-cushion type coal sorting feeder of raising efficiency of combustion.
This utility model provides a kind of air-cushion type coal sorting feeder, is adopted the technical scheme that:
A kind of air-cushion type coal sorting feeder, takes over broadcasting coal including coal-feeding tube, and described coal-feeding tube tilts to be connected to furnace water cooling
On wall, described in broadcast coal adapter two ends be respectively connection hot blast or high-pressure blast give a dinner for a visitor from afar mouth and connect coal-feeding tube broadcast coal spray
Mouthful, described in broadcast coal adapter and connect with coal-feeding tube and be connected on furnace wall cooling by broadcasting coal spout, described in broadcast coal spout and water
Square dip down certain angle α, α is generally in 10 degree ~ 35 degree, and described coal-feeding tube and horizontal direction have a down dip certain angle β, and β is usual
In 10 degree ~ 70 degree and β ＞ α；There is certain differential seat angle (β-α) between coal spout and described coal-feeding tube in described broadcasting, described in broadcast coal spray
Mouthful be middle hollow joint body structure wide at the top and narrow at the bottom, described in broadcast the cross-sectional area cross-sectional area less than mouth of giving a dinner for a visitor from afar of coal spout.
The port of described coal-feeding tube bottom is connected with broadcasting coal spout, and described port is provided with breach, described in broadcast coal spout
Upper surface is provided with the interface matched with breach.
Described broadcast coal adapter and include broadcasting coal spout, give a dinner for a visitor from afar mouth and the taper connection pipe of coal spout and mouth of giving a dinner for a visitor from afar, shape are broadcast in connection
Become spout effect.
The port breach of described coal-feeding tube bottom is positioned at broadcasts coal spout, and the coal charge of described coal-feeding tube is by broadcasting on coal spout
The interface on surface is slipped to broadcast in coal spout, forms wind torr coal gas mat structure.
Described coal spout of broadcasting has a down dip certain angle α, α generally in 10 degree ~ 35 degree with horizontal direction.
Described coal spout of broadcasting is middle hollow joint body structure wide at the top and narrow at the bottom；The described cross-sectional area of coal spout of broadcasting is less than giving a dinner for a visitor from afar mouth
Cross-sectional area.
Have a down dip certain angle β, β of described coal-feeding tube and horizontal direction is generally in 10 degree ~ 70 degree, and β ＞ α.
The beneficial effects of the utility model are:
Broadcast coal adapter give a dinner for a visitor from afar mouth and broadcast coal spout cross-sectional area official post broadcast coal nozzle formed injection stream, and wind regime use
A hot blast that pressure is higher or high-pressure blast, strengthen jet rigidity in cross-sectional direction and width, beneficially increase broadcast coal
The throwing in cross-sectional direction of wind range, more conducively coal dissipates, and broadcasts coal better；By coal-feeding tube bottom and broadcast coal spout upper surface
It is designed to corresponding breach and Interface Shape, is formed and seal structure, make to be slipped to broadcast coal spout internal from the coal charge of coal-feeding tube
Air cushion on, on the one hand form wind torr coal gas mat structure, play air cushion cushioning effect, will not directly clash into coal sorting feeder because of fire coal
And bond, it is to avoid there is chute blockage phenomenon in coal spout outlet, also extend the life-span broadcasting coal spout simultaneously；Owing to coal supply is scattered
On air cushion, mobility strengthens, and under the jet action of high pressure coal spread wind, is more easy to overcome burner hearth back pressure to increase fed distance,
And broadcast the spreading effect of coal nozzle exit shape and coal spread wind, being also beneficial to coal uniformly sows on bed surface, prevent coal supply to
Local accumulation near coal mouth.
Broadcast coal spout and coal-feeding tube has a down dip with horizontal direction certain angle respectively, and broadcast coal spout and coal-feeding tube exists certain
Differential seat angle (β-α), formed wind torr coal gas mat structure, so when air-cushion type coal sorting feeder works, both formed wind torr coal gas pad,
It is positioned at horizontal plane bottom certain area coverage because broadcasting coal spout injection stream again, on the one hand can extend in coal relatively fine particle at stove
On the other hand stop burning time in thorax, larger particles in coal can be delayed to sink time of siege, the beneficially stream of fuel
Change and after-flame, improve fuel availability.
Broadcasting coal spout is middle hollow joint body structure wide at the top and narrow at the bottom, and makes the cross-sectional area broadcasting coal spout be less than the horizontal stroke of mouth of giving a dinner for a visitor from afar
Sectional area；Again by mouth of giving a dinner for a visitor from afar, taper connection pipe and broadcast under the guide functions that coal spout flow area is gradually reduced, broadcasting coal
Spout forms injection effect, to improve coal spread wind speed, strengthens and carries and broadcast coal ability；Use simultaneously and wide at the top and narrow at the bottom broadcast coal spout
The throwing in cross-sectional direction of cross sectional shape, more conducively coal dissipates, and broadcasts coal better.
Owing to broadcasting the jet of coal spout, inner flue gas of the stove is produced perturbation action, be equivalent to be formed at coal feeding hole position one layer of guarantor
Protecting air curtain, weaken the effect of malleation (ascending air) in stove, also auxiliary strengthens coal spread wind sealing function, anti-to preventing heat smoke
Alter and also function to certain facilitation.And coal spread wind source takes from a higher hot blast of pressure head or high-pressure blast, can uninterruptedly provide
Coal spread wind power, it is to avoid have to persistently to open and cause energy waste during use overfire air fan.
The air-cushion type coal sorting feeder that this utility model provides, can more preferably meet the demand of fluid bed uniform distribution, so that coal
Preferably mix with the material in burner hearth, promote homogeneous temperature in bed, effectively prevent coal charge at coal feeding hole near zone local heap
Long-pending, cause fluidisation bad and cause slagging failure, be simultaneously also beneficial to the economical operation of boiler, beneficially efficient burning and reduction
Pollutant generate, and also greatly improve the underrun ability of boiler.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art strength coal sorting feeder；
Embodiment one structural representation of Fig. 2 this utility model air-cushion type coal sorting feeder；
Fig. 3 is the cross section structure schematic diagram of A-A in Fig. 2；
Fig. 4 is the cross section structure schematic diagram broadcasting coal spout；
Fig. 5 is the structural representation of coal-feeding tube bottom.
In figure: 1-furnace wall cooling, 2-coal-feeding tube, 3-broadcasts coal adapter, and 4-broadcasts coal spout, and 5-gives a dinner for a visitor from afar mouth, 6-connecting tube, 7-
Interface, 8-breach.
Detailed description of the invention
The embodiment one of this utility model air-cushion type coal sorting feeder, as shown in Fig. 1 ~ 5, takes over broadcasting coal including coal-feeding tube 2
3, described coal-feeding tube 2 tilts to be connected on furnace wall cooling 1, described in broadcast coal adapter 3 and connect with coal-feeding tube 2 and be connected to burner hearth water
In cold wall 1, described in broadcast the angle of coal spout 4 and horizontal direction be α, α in the range of 10 degree ~ 35 degree, described coal-feeding tube 2 and level
The angle in direction is that β, β are in the range of 10 degree ~ 70 degree and β ＞ α；Described broadcast exist between coal spout 4 and described coal-feeding tube 2 certain
Differential seat angle (β-α)；The described two ends broadcasting coal adapter 3 are respectively give a dinner for a visitor from afar mouth 5 and the connection coal supply of hot blast of connection or high-pressure blast
Pipe 2 broadcast coal spout 4, described in broadcast coal spout 4 be middle hollow joint body structure wide at the top and narrow at the bottom；The described cross-sectional area broadcasting coal spout 4
Less than the cross-sectional area of mouth 5 of giving a dinner for a visitor from afar, so can form ejection-type broadcasts coal spout, strengthens jet rigidity in cross-sectional direction
And width, be conducive to strengthening the throwing in cross-sectional direction of coal spread wind range, more conducively coal and dissipate, and cloth wind is uniform, prevents coal charge
Local accumulation near coal feeding hole.
As shown in Fig. 4 ~ 5, the port of coal-feeding tube 2 bottom is connected with broadcasting coal spout 4, and the port of described coal-feeding tube 2 bottom sets
Be equipped with breach 8, described in broadcast the upper surface of coal spout 4 and be provided with the interface 7 matched with breach 8, so make coal-feeding tube and coal spread wind
Adapter is tightly connected, and coal-feeding tube bottom is included in be broadcast in the range of the injection of coal spout, and coal charge falls and broadcasting the air cushion that coal spout is formed
On, form wind torr coal gas mat structure, in order to coal supply falls and broadcasting the conveying of coal spout internal, beneficially coal and disseminating.
Broadcast coal adapter 3 and include broadcasting coal spout 4, the mouth 5 and connect the taper connection pipe 6 broadcasting coal spout and mouth of giving a dinner for a visitor from afar of giving a dinner for a visitor from afar.
In the present embodiment, the angle α broadcasting coal spout and horizontal direction is 15 degree, and mouth of giving a dinner for a visitor from afar connects the once heat that pressure head is higher
Wind.Coal-feeding tube is 55 degree with the angle β of horizontal direction, broadcasts and there are certain differential seat angle (β-α=40 between coal spout and coal-feeding tube
Degree).So when air-cushion type coal sorting feeder works, because coal breakage direction constitutes certain angle (β-α), self-assembling formation with broadcasting coal direction
Wind torr coal gas mat structure, is simultaneously positioned at horizontal plane bottom certain area coverage because broadcasting the injection stream of coal spout, makes coal spread wind penetrate
Flow path direction and horizontal direction have a down dip certain angle α, when on the one hand can extend the stop burning in burner hearth of relatively fine particle in coal
Between, on the other hand larger particles in coal can be delayed to sink the fluidisation of time of siege, beneficially fuel and after-flame, improve fuel
Utilization rate.
In other embodiments of the present utility model, mouth of giving a dinner for a visitor from afar connects the high-pressure blast provided by high pressure positive blower.
The air-cushion type coal sorting feeder that this utility model provides, by coal-feeding tube bottom with broadcast coal spout upper surface and be designed to breach
Connect and seal structure, make to be slipped to broadcast coal spout internal from the coal of coal-feeding tube, broadcasting coal by the guide functions broadcasting coal adapter
Form one layer of jet air cushion in spout, form wind torr coal gas mat structure, on the one hand play cushioning effect, directly will not hit because of coal charge
Hit and broadcast coal spout and bond, it is to avoid broadcast coal pipe outlet blockage phenomenon, extend the life-span broadcasting coal pipe, simultaneously because
Coal supply is scattered on air cushion, and mobility strengthens, and under the jet action of high pressure coal spread wind, is more easy to overcome burner hearth back pressure to increase defeated
Send distance
Broadcasting coal spout is middle hollow joint body structure wide at the top and narrow at the bottom, and makes the cross-sectional area broadcasting coal spout be less than the horizontal stroke of mouth of giving a dinner for a visitor from afar
Sectional area；Again by mouth of giving a dinner for a visitor from afar, taper connection pipe and broadcast under the guide functions that coal spout flow area is gradually reduced, broadcasting coal
Spout forms injection effect, can effectively reduce resistance, to improve coal spread wind speed, strengthens and carries and broadcast coal ability；On using simultaneously
Broadcast coal nozzle exit shape, more conducively coal throwing in cross-sectional direction narrow under width dissipate, and broadcast coal better.
Coal spread wind source uses the higher hot blast of pressure head or high-pressure blast, can make to broadcast coal spout and have higher jet and move
Amount, broadcasts coal effect to strengthen；On the other hand, the jet broadcasting coal spout produces perturbation action to furnace air, at coal feeding hole position
Forming one layer of protection air curtain, weaken the effect of malleation (ascending air) in stove, also auxiliary strengthens coal spread wind sealing function, and has
It is beneficial to prevent heat smoke anti-channeling in burner hearth；Because coal spread wind takes from a higher hot blast of pressure head or is carried by the least high pressure positive blower
The high-pressure blast of confession, thus reduce and enabling of overfire air fan, save the energy.
The air-cushion type coal sorting feeder that this utility model provides can more preferably meet the demand of fluid bed bed surface uniform distribution, so that
Material in coal and burner hearth preferably mixes, and promotes homogeneous temperature in bed, effectively prevents coal charge in coal feeding hole near zone local
Pile up, cause fluidisation bad and cause slagging failure, be simultaneously also beneficial to the economical operation of boiler, beneficially efficient burning and fall
Low stain thing generates, and also greatly improves the underrun ability of boiler.
In other embodiments of the present utility model, the shape broadcasting coal spout can be the annulus arc that two side ends upwarps, and cuts
Face is middle hollow joint body structure, forms spout effect with broadcasting coal pipe connecting device；And make the coal charge of coal-feeding tube be slipped to broadcast in coal spout.
This utility model provide air-cushion type coal sorting feeder also apply be applicable to other fuel such as biomass feeding apparatus to
Material device.
The foregoing is only preferred embodiment of the present utility model, not limit practical range of the present utility model with this,
All those skilled in the art, use principle of the present utility model and technical characteristic, and the various changes made and decoration all should be contained
Within the protection category that the claims is defined.
Claims (5)
1. an air-cushion type coal sorting feeder, takes over broadcasting coal including coal-feeding tube, and described coal-feeding tube tilts to be connected to furnace wall cooling
On, described in broadcast coal adapter two ends be respectively connection hot blast or high-pressure blast give a dinner for a visitor from afar mouth and connect coal-feeding tube broadcast coal spray
Mouthful, described in broadcast coal adapter and connect with coal-feeding tube and be connected on furnace wall cooling by broadcasting coal spout, it is characterised in that broadcast described in:
The angle of coal spout and horizontal direction be α, α in the range of 10 degree ~ 35 degree, the angle of described coal-feeding tube and horizontal direction is β, β
In the range of 10 degree ~ 70 degree, and β is more than α；The described cross section broadcasting coal spout is middle hollow joint body structure wide at the top and narrow at the bottom, described in broadcast
The cross-sectional area of coal spout is less than the cross-sectional area of mouth of giving a dinner for a visitor from afar.
Air-cushion type coal sorting feeder the most according to claim 1, it is characterised in that: the port of described coal-feeding tube bottom with broadcast coal
Spout connects, and described port is provided with breach, described in broadcast the upper surface of coal spout and be provided with the interface matched with this breach, institute
State breach and interface fixed seal connection.
Air-cushion type coal sorting feeder the most according to claim 1, it is characterised in that broadcast described in: coal adapter include broadcasting coal spout,
Give a dinner for a visitor from afar mouth and broadcast coal spout and the taper connection pipe of mouth of giving a dinner for a visitor from afar with connecting.
Air-cushion type coal sorting feeder the most according to claim 1, it is characterised in that broadcast the folder of coal spout and horizontal direction described in:
Angle α is 15 degree or 25 degree or 30 degree.
Air-cushion type coal sorting feeder the most according to claim 1, it is characterised in that: described coal-feeding tube and the angle of horizontal direction
β is 50 degree or 55 degree or 60 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620543962.6U CN205782887U (en) | 2016-06-07 | 2016-06-07 | A kind of air-cushion type coal sorting feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620543962.6U CN205782887U (en) | 2016-06-07 | 2016-06-07 | A kind of air-cushion type coal sorting feeder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205782887U true CN205782887U (en) | 2016-12-07 |
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ID=58134015
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620543962.6U Expired - Fee Related CN205782887U (en) | 2016-06-07 | 2016-06-07 | A kind of air-cushion type coal sorting feeder |
Country Status (1)
| Country | Link |
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| CN (1) | CN205782887U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325280A (en) * | 2020-10-29 | 2021-02-05 | 中国石油化工集团有限公司 | CFB boiler feed inlet anti-coking device |
| CN112460588A (en) * | 2020-11-16 | 2021-03-09 | 山西昱光发电有限责任公司 | Coal feeding system and method for preventing coal blockage of coal dropping pipe |
-
2016
- 2016-06-07 CN CN201620543962.6U patent/CN205782887U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325280A (en) * | 2020-10-29 | 2021-02-05 | 中国石油化工集团有限公司 | CFB boiler feed inlet anti-coking device |
| CN112460588A (en) * | 2020-11-16 | 2021-03-09 | 山西昱光发电有限责任公司 | Coal feeding system and method for preventing coal blockage of coal dropping pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20200607 |
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| CF01 | Termination of patent right due to non-payment of annual fee |