CN208920042U - A kind of quick load change circulating fluidized bed boiler - Google Patents
A kind of quick load change circulating fluidized bed boiler Download PDFInfo
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- CN208920042U CN208920042U CN201821390931.7U CN201821390931U CN208920042U CN 208920042 U CN208920042 U CN 208920042U CN 201821390931 U CN201821390931 U CN 201821390931U CN 208920042 U CN208920042 U CN 208920042U
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- peak regulation
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- regulation storehouse
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Abstract
A kind of quick load change circulating fluidized bed boiler, including burner hearth, material separator, material returning device, ash control valve, quick peak regulation storehouse and peak regulation storehouse refeed line, quick peak regulation storehouse are connected to material returning device, and are connected by peak regulation storehouse refeed line with lower furnace portion.Ash control valve setting is on material returning device and quick peak regulation storehouse communicating pipe.Quick peak regulation orlop portion is provided with air-distribution device, is arranged according to 0.3~1m/s of fluidising air velocity in quick peak regulation storehouse.Quickly peak regulation storehouse is tilted is provided with dust block board.Quick peak regulation storehouse cross section is rectangle or circle.Quick peak regulation storehouse setting is more than two, and is arranged in a one-to-one correspondence with material returning device.The utility model reasonably arranged by the components such as dipleg, material returning device, refeed line and quick peak regulation storehouse, realizes during peak regulation rapidly changing for material concentration in furnace, has the requirement of fast response characteristic to adapt to power grid to steam parameter.
Description
Technical field
The utility model describes a kind of quick load change circulating fluidized bed boiler, belongs to field of combustion equipment, especially relates to
And circulating fluidized bed boiler field.
Background technique
Currently, the energy system in China has started gradually to develop to low-carbon energy from traditional coal energy.With power generation
The installed capacity growth of industry strategic transformation and structure adjustment of power source, new energy electric power is swift and violent.National energy development " 13
Five " plan proposition, and the year two thousand twenty realizes 2.2 hundred million kW or more of national wind-powered electricity generation installation, 1.1 hundred million kW or more of solar power generation installation.By
Year ends 2017, China's wind-powered electricity generation, solar power generation installed capacity have reached 2.94 hundred million kW, and the 16.5% of Zhan Quanguo total installation of generating capacity.
Wherein, photoelectricity installed capacity is 1.3 hundred million kW, increases by 68.7% on year-on-year basis, total amount realizes national energy development " 13 in advance
The target proposed in five " planning.
Compared to traditional thermoelectricity, wind-powered electricity generation and photoelectricity items growth rate are all fairly obvious, be limited to peaking power source construction lag and
The pressure of the increase of power load peak-valley difference, power grid consumption new energy electric power is increasingly sharpened.Fired power generating unit flexibility transformation, combustion gas
Power generation, water-storage and other novel energy-storing modes are all the effective means for improving electric system peak modulation capacity.But it is built
If the restriction of many factors such as condition, Construction and operation cost, construction period, technical maturity, fuel gas generation, water-storage with
And the ratio of other novel energy-storings is total no more than 5%, and is difficult to be promoted in the following certain time, according to China's electric power knot
Structure, the operational objective of fired power generating unit from pursue it is energy-efficient be changed into the flexibility for focusing on promoting unit, unit depth peak regulation and
Rapid starting/stopping ability.
To circulating fluidized bed boiler, in lifting load, there are a large amount of bed material in furnace, biggish amount of stored heat causes unit
Furnace heat transfer process thermal inertia is big, and in generation load variation, Boiler Steam parameter is difficult to carry out quick response, so as to cause following
Circulation fluidized bed boiler load changing rate is significantly lower than pulverized-coal fired boiler.
Exactly in this context, it would be desirable to be conceived to burning in circulating fluid bed boiler characteristic, and combine its own
Structure and operation characteristic, existing equipment is improved, while proposing corresponding progress control method, be not significantly increased into
Under the premise of this, the flexibility of unit is effectively improved, to adapt to the demand of depth peak regulation, really realizes the warp of utilization of new energy resources
The unification for the benefit, social benefit and environmental benefit of helping.
Utility model content
The purpose of this utility model is to provide the circulating fluidized bed boiler that one kind is capable of quick load change, to realize power generation
When load variations, the steam parameter of boiler is able to carry out quick response, adapts to the demand of depth peak regulation, realizes new energy
The economic benefit social benefit and environmental benefit utilized.
The utility model is achieved through the following technical solutions:
A kind of quick load change circulating fluidized bed boiler, including burner hearth, material separator and material returning device, the upper furnace
Be connected with the entrance of the material separator, the material returning device be connected to below the material separator with the lower furnace portion it
Between, and connect respectively by dipleg and refeed line with the material separator and the burner hearth, it is characterised in that: the boiler is also
Including ash control valve, quick peak regulation storehouse and peak regulation storehouse refeed line, the quick peak regulation storehouse is connected to the material returning device, and passes through peak regulation
Storehouse refeed line is connected with the lower furnace portion；The ash control valve is arranged in the material returning device and the quick peak regulation storehouse communicating pipe
On.
In above-mentioned technical proposal, the boiler further includes the air-distribution device that the quick peak regulation orlop portion is arranged in, described
Air-distribution device resistance is 2~6kPa, and the air-distribution device is arranged according to quick peak regulation storehouse 0.3~1m/s of fluidising air velocity.
In above-mentioned technical proposal, the quick peak regulation storehouse is tilted to be provided with dust block board, and the dust block board is close to the tune
The setting of peak storehouse returning charge tube inlet.
In above-mentioned technical proposal, the quick peak regulation storehouse cross section is rectangle or circle.
In above-mentioned technical proposal, when the quick peak regulation storehouse cross section is round, the quick peak regulation storehouse cross-sectional diameter D
About 0.8~1.2 times of its height H.
In above-mentioned technical proposal, the peak regulation storehouse refeed line tilt angle is 35 °~50 °, and it connect with the burner hearth
Position height and the refeed line it is consistent with the position height that the burner hearth connects.
In above-mentioned technical proposal, the quick peak regulation storehouse shell is made of steel plate, successively lays from outside to inside on the inside of steel plate
Thermal insulation material and wearing-proof refractory material.
In above-mentioned technical proposal, the quick peak regulation storehouse setting is more than two.
The utility model has the following advantages that and the utility model has the advantages that by dipleg, material returning device, refeed line and quick peak regulation storehouse etc.
Component reasonably arranges, realizes during peak regulation rapidly changing for material concentration in furnace, has to adapt to power grid to steam parameter
There is the requirement of fast response characteristic.
Detailed description of the invention
Fig. 1 is a kind of quick load change circulating fluidized bed boiler schematic diagram involved in the utility model.
In figure: 1-burner hearth；2-material separators；3-back-end ductworks；4-material returning devices；5-refeed lines；6-third cloth
Wind apparatus；7-the second air-distribution devices；8-the first air-distribution devices；9-ash control valves；10-quick peak regulation storehouses；11-peak regulation storehouse cloth
Wind apparatus；12-dust block boards；13-peak regulation storehouse refeed lines.
Specific embodiment
Specific embodiment of the present utility model and its workflow are further described below in conjunction with attached drawing.
The positional terms such as the upper, lower, left, right, front and rear in present specification be positional relationship based on the figure and
It establishes.
The utility model provides a kind of quick load change circulating fluidized bed boiler.As shown in Figure 1, boiler includes burner hearth 1, object
Expect separator 2 and material returning device 4.1 top of burner hearth is connected with the entrance of material separator 2, and material returning device 4 is connected to material separator 2
Between 1 lower part of lower section and burner hearth, and it is connect respectively by dipleg and refeed line 5 with material separator 2 and burner hearth 1.Boiler also wraps
Back-end ductwork 3 is included, back-end ductwork 3 is connected with the exhanst gas outlet of material separator 2.1 bottom of burner hearth is equipped with the first air-distribution device 8,
Below dipleg and 4 bottom of material returning device is respectively arranged with third air-distribution device 6 and the second air-distribution device 7.
Boiler further includes ash control valve 9, quick peak regulation storehouse 10 and peak regulation storehouse refeed line 13.Quick peak regulation storehouse 10 and material returning device 4
Connection, and be connected by peak regulation storehouse refeed line 13 with 1 lower part of burner hearth.Quick 10 cross section of peak regulation storehouse is rectangle or circle.
When quick 10 cross section of peak regulation storehouse is round, quick 10 cross-sectional diameter D of peak regulation storehouse be about its height H 0.8~
1.2 again.
In general, quickly 10 size of peak regulation storehouse should be adapted to the recirculating fluidized bed of different capabilities, when boiler is three separation
When the 300MW of device, according to circular cross-section, it is highly the quick peak regulation storehouse of 4~6m that settable three diameters, which are 3m,.When quick
When peak regulation storehouse 10 selects rectangle, cross-sectional area is preferably in 6~8m2, warehouse height is 4~6m.
The ash control setting of valve 9 is on material returning device 4 and quick 10 communicating pipe of peak regulation storehouse.Ash control valve 9 selects cone valve, has cylinder
The fixed valve casing of shape, with a movable steel valve pocket outside cone, the annular space between valve pocket and cone is used to pass through ash material.With
Valve pocket is moved forward and backward by screw drive along flow direction, i.e., controllable ash material disengaging.When being all turned on, it can with maximum speed adjust
Peak.
Quick 10 bottom of peak regulation storehouse is equipped with air-distribution device 11.11 air distribution of air-distribution device is to the solids in quick peak regulation storehouse 10
Material has loosening effect.11 resistance of air-distribution device is 2~6kPa, and institute's air distribution makes the fluidizing velocity in quick peak regulation storehouse 10 to be
0.3~1m/s.
Quick peak regulation storehouse 10 is tilted to be provided with dust block board 12, and dust block board 12 is arranged close to 13 entrance of peak regulation storehouse refeed line,
It prevents from the cigarette ash from burner hearth 1 from returning to alter.
Refeed line 13 tilt angle in peak regulation storehouse is 35 °~50 °, and its position height for connect with burner hearth 1 and refeed line 5 and
The position height that burner hearth 1 connects is consistent.
When needing to reduce load in boiler running process, ash control valve 9 is opened, the cloth of quick 10 bottom of peak regulation storehouse is kept
Wind apparatus 11 it is obstructed enter fluidized wind, circulating ash will partially by ash control valve 9 enter quick peak regulation storehouse 10, to reduce circulation
Ash quantity, reduce burner hearth in ash concentration, accelerate furnace heat transfer coefficient reduction rate, to improve the variation of steam parameter
Rate.For the radiation loss for reducing quick peak regulation storehouse, peak regulation effect is influenced, quick 10 outer wall of peak regulation storehouse is made of steel plate, liner
Wearing-proof refractory material and thermal insulation material.Simultaneously when needing load up in boiler running process, quick 10 bottom of peak regulation storehouse
Air-distribution device 11 be passed through fluidized wind, by circulating ash by addition peak regulation storehouse refeed line 13 be blown into burner hearth, to increase
The ash quantity of circulation improves material concentration in furnace and to improve furnace heat transfer coefficient accelerates the raising rate of steam parameter.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of quick load change circulating fluidized bed boiler, including burner hearth (1), material separator (2) and material returning device (4), described
Burner hearth (1) top is connected with the entrance of the material separator (2), and the material returning device (4) is connected to the material separator (2)
Between lower section and the burner hearth (1) lower part, and respectively by dipleg and refeed line (5) and the material separator (2) and described
Burner hearth (1) connection, it is characterised in that: the boiler further includes ash control valve (9), quick peak regulation storehouse (10) and peak regulation storehouse refeed line
(13), the quick peak regulation storehouse (10) is connected to the material returning device (4), and passes through peak regulation storehouse refeed line (13) and the burner hearth
(1) lower part is connected；Ash control valve (9) setting is on the material returning device (4) and quick peak regulation storehouse (10) communicating pipe.
2. a kind of quick load change circulating fluidized bed boiler according to claim 1, it is characterised in that: the boiler also wraps
Setting is included in the air-distribution device (11) of quick peak regulation storehouse (10) bottom, the air-distribution device (11) is by according to quick peak regulation storehouse
(10) interior 0.3~1m/s of fluidising air velocity setting.
3. a kind of quick load change circulating fluidized bed boiler according to claim 1 or 2, it is characterised in that: described quick
Peak regulation storehouse (10) is tilted to be provided with dust block board (12), and the dust block board (12) sets close to peak regulation storehouse refeed line (13) entrance
It sets.
4. a kind of quick load change circulating fluidized bed boiler according to claim 3, it is characterised in that: the quick peak regulation
Storehouse (10) cross section is rectangle or circle.
5. a kind of quick load change circulating fluidized bed boiler according to claim 4, it is characterised in that: the quick peak regulation
When storehouse (10) cross section is round, quick peak regulation storehouse (10) the cross-sectional diameter D is about 0.8~1.2 times of its height H.
6. a kind of quick load change circulating fluidized bed boiler according to claim 1, it is characterised in that: return in the peak regulation storehouse
Expects pipe (13) tilt angle is 35 °~50 °, and its position height for connecting with the burner hearth (1) and the refeed line (5) and institute
The position height for stating burner hearth (1) connection is consistent.
7. a kind of quick load change circulating fluidized bed boiler according to claim 1, it is characterised in that: the quick peak regulation
Storehouse (10) shell is made of steel plate, successively lays thermal insulation material and wearing-proof refractory material on the inside of the steel plate from outside to inside.
8. a kind of quick load change circulating fluidized bed boiler according to claim 1, it is characterised in that: the quick peak regulation
Storehouse (10) setting is more than two.
9. a kind of quick load change circulating fluidized bed boiler according to claim 8, it is characterised in that: the material returning device
(4) setting is more than two, and the quick peak regulation storehouse (10) is arranged in a one-to-one correspondence with the material returning device (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821390931.7U CN208920042U (en) | 2018-08-27 | 2018-08-27 | A kind of quick load change circulating fluidized bed boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821390931.7U CN208920042U (en) | 2018-08-27 | 2018-08-27 | A kind of quick load change circulating fluidized bed boiler |
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| CN208920042U true CN208920042U (en) | 2019-05-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114546A (en) * | 2018-08-27 | 2019-01-01 | 清华大学 | A kind of quick load change circulating fluidized bed boiler |
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2018
- 2018-08-27 CN CN201821390931.7U patent/CN208920042U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114546A (en) * | 2018-08-27 | 2019-01-01 | 清华大学 | A kind of quick load change circulating fluidized bed boiler |
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