CN207729583U - A kind of circulating fluidized bed boiler cycle ash handing system - Google Patents
A kind of circulating fluidized bed boiler cycle ash handing system Download PDFInfo
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- CN207729583U CN207729583U CN201721396416.5U CN201721396416U CN207729583U CN 207729583 U CN207729583 U CN 207729583U CN 201721396416 U CN201721396416 U CN 201721396416U CN 207729583 U CN207729583 U CN 207729583U
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- cooler
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Abstract
A kind of circulating fluidized bed boiler cycle ash handing system, including burner hearth, separator, material returning device, cycle ash cooler, No.1 circulating ash batcher, high pressure fluidization fan, ash cellar, run coal bin and No. two circulating ash batchers；After being trapped by separator by big department's ash particle in the ash-laden gas of burner hearth discharge, enters cycle ash cooler through material returning device, circulating ash is delivered to burner hearth, ash cellar or run coal bin by No.1 circulating ash batcher；Circulating ash in ash cellar can be delivered to burner hearth or automobile outward transport by No. two circulating ash batchers；Into run coal bin circulating ash mixed with raw coal after be directly entered burner hearth；The system has under boiler different load, and the stability contorting of boiler combustion system is realized in the quantitative control of circulating ash quantity；In addition, the system has many advantages, such as fire box temperature control, can effectively mitigate run coal bin and feeder blocking.
Description
Technical field
The utility model is related to circulating fluidized bed boiler to run control technology, and in particular to a kind of circulating fluidized bed boiler is followed
Ring ash handing system.
Background technology
The requirement of recirculating fluidized bed (CFB) boiler operatiopn feature：Combustion system must be provided with the grey circulatory system (upper furnace-
Separator-lower furnace portion-upper furnace), after fuel and required air enter burner hearth and burn, carbon containing soot particle flies ease stove
Thorax, the soot particle for being more than separation incising control (d99) are trapped by separator, and returning to burner hearth through material returning device participates in Matter Transfer,
For circulating ash；And the soot particle less than separation cutting material diameter (d99) flies into back-end ductwork, becomes boiler fly ash.Matter Transfer flows
Along with quality and energy flow, the combustion share in each region in stove can be had an impact, to maintaining the sunken bed of recirculating fluidized bed
Temperature operation is most important, and can influence the key properties such as desulfuration in furnace, abrasion.
Proved by furnace heat transfer analysis and engineering practice, the furnace heat transfer coefficient of CFB boiler with material concentration increase
And increase.If material concentration is too low, it is excessively high to easily cause emulsion zone bed temperature, increases coking risk, in addition, because of the excessively high increasing of local bed temperature
Add SO2With NOXConcentration of emission increases desulphurization denitration cost, reduces unit economy；When using inferior fuel, because of ash content in coal
Excessive, it is excessive to easily cause material concentration, relatively low so as to cause bed temperature, burning is insufficient, not only influences boiler normal operation, but also
Reduce boiler combustion efficiency.
Therefore, reasonable control material concentration (circulating ash quantity) to the safety of boiler operatiopn with economy by important shadow
It rings.
Invention content
In order to realize effective control of CFB boiler circulating ash quantity, the purpose of this utility model is to provide a kind of recycle streams
Fluidized bed boiler recycles ash handing system, which has outstanding advantages of circulating ash quantity is continuous, adjustable, controllable, fundamentally solve
Certainly CFB boiler circulating ash quantity is difficult to the technical barrier accurately controlled.
In order to achieve the above object, the utility model uses following technical scheme：
A kind of circulating fluidized bed boiler cycle ash handing system, is applied to new-built unit or in-service unit；Including setting
Switch valve is arranged in cycle ash cooler 4 in 3 lower part of material returning device, 4 entrance of cycle ash cooler, and valve is using pneumatically or electrically
Dynamic control, outlet setting hand operated gate valve, is overhauled for being arranged in the No.1 circulating ash batcher 5 for recycling 4 lower part of ash cooler；
Circulating ash uses pneumatic conveying mode, the high pressure fluidisation that conveying air source is provided using the high pressure fluidization fan 6 for being matched in material returning device 3
Wind, existing station-service compressed air or newly-increased high pressure fluidization fan；It is described to be exported through recycling 4 circulating ash after cooling of ash cooler
Divide three tunnels, be separately connected burner hearth 1, ash cellar 7 and run coal bin 8 so that switching is delivered to burner hearth to circulating ash after cooling respectively on demand
1, ash cellar 7 or run coal bin 8, until burner hearth 1 and run coal bin 8, which convey branch line, is respectively provided with flowmeter, for conveying circulating ash quantity control,
Circulating ash is delivered to burner hearth 1 by the circulating ash to burner hearth 1 using single-point or multiple spot；Two outlets are arranged in the ash cellar 7, respectively
Corresponding No. two circulating ash batchers 9 and bulk cement truck, two outlets are respectively provided with switch valve, and valve is used and pneumatically or electrically controlled；
Circulating ash is delivered to burner hearth 1 by circulating ash using single-point or multiple spot after the ash cellar 7, and flow is arranged in rear circulating ash conveyance conduit
Meter, for conveying circulating ash quantity control, rear circulating ash conveying air source is provided using the high pressure fluidization fan 6 for being matched in material returning device 3
Hp fluid air, existing station-service compressed air or newly-increased high pressure fluidization fan；8 outlet burner hearth 1 of the run coal bin.
The cycle ash cooler 4 is using the moving bed cooler to fall by its own gravity or by external impetus
Mechanical rotation cooler.
The cycle ash cooler 4 is using the moving bed cooler to fall by its own gravity.
The No.1 circulating ash batcher 5 and No. two circulating ash batchers 9 use vertical or horizontal rotary batcher.
The switch valve of cycle 4 entrance of the ash cooler setting uses pneumatic control.
The circulating ash uses pneumatic conveying mode, conveying air source to be carried using the high pressure fluidization fan 6 for being matched in material returning device 3
The hp fluid air of confession.
The high-pressure spray that circulating ash conveying air source is provided using the high pressure fluidization fan 6 for being matched in material returning device 3 after the ash cellar 7
Change wind.
The control method of the described circulating fluidized bed boiler cycle ash handing system, in the ash-laden gas be discharged by burner hearth 1
Big department's ash particle by separator 2 trap after, through material returning device 3 enter cycle ash cooler 4, by No.1 circulating ash batcher 5
Circulating ash is delivered to burner hearth 1, ash cellar 7 or run coal bin 8；Circulating ash in ash cellar 7 is delivered to by No. two circulating ash batchers 9
Burner hearth or automobile outward transport；Into run coal bin 8 circulating ash mixed with raw coal after be directly entered burner hearth 1；In normal operation, No.1
Switching is delivered to burner hearth 1, ash cellar 7 or run coal bin 8 to circulating ash batcher 5 on demand；If circulating ash quantity is too low, then No.1 of stopping transport is followed
Ring ash batcher 5 is delivered to burner hearth 1 by No. two circulating ash batchers 9 by circulating ash is stored.
The circulating ash conveying control that the ash cellar 7 is discharged, automatically engages operation and can by ingredient and the granularity of as-fired coal
Realize quantitative control.
The utility model has the following advantages：
1, it can be achieved under boiler different load, the stability contorting of circulating ash quantity；
2, it can be achieved under boiler different load, bed temperature stability contorting；
3, return burner hearth circulating ash quantity can be achieved quantitatively to control；
4, it can realize substantially and return to the control of burner hearth circulating ash quantity temperature；
5, system can put into automatic running；
6, it can effectively mitigate run coal bin and feeder blocks.
Description of the drawings
Fig. 1 is the control system schematic diagram of the utility model.
The meaning of wherein each reference numeral is as follows：
1, burner hearth；2, separator；3, material returning device；4, ash cooler is recycled；5, No.1 circulating ash batcher；6, high pressure fluidizes
Wind turbine；7, ash cellar；8, run coal bin；9, No. two circulating ash batchers.
Specific implementation mode
The utility model is described in more detail with reference to the accompanying drawings and detailed description.But those skilled in the art
Understand, the embodiment is not limitations of the present invention, any all to exist to being altered or varied of making of the utility model
Within the scope of protection of the utility model.
As shown in Figure 1, a kind of circulating fluidized bed boiler of the utility model recycles ash handing system, be applied to new-built unit or
The in-service unit of person；Including the cycle ash cooler 4 in 3 lower part of material returning device, 4 entrance of the cycle ash cooler setting switch is arranged
Valve, for valve using pneumatically or electrically controlling, setting hand operated gate valve in outlet is recycling the one of 4 lower part of ash cooler for being arranged
Number circulating ash batcher 5 overhauls；Circulating ash uses pneumatic conveying mode, and conveying air source is using the high-pressure spray for being matched in material returning device 3
Change hp fluid air, existing station-service compressed air or newly-increased high pressure fluidization fan that wind turbine 6 provides；It is described to be cooled down through circulating ash
4 circulating ash after cooling of device outlet point, three tunnels, are separately connected burner hearth 1, ash cellar 7 and run coal bin 8 so that circulating ash after cooling is pressed
It need to switch and be delivered to burner hearth 1, ash cellar 7 or run coal bin 8 respectively, until burner hearth 1 and run coal bin 8, which convey branch line, is respectively provided with flowmeter,
For conveying circulating ash quantity control, until circulating ash is delivered to burner hearth 1 by the circulating ash of burner hearth 1 using single-point or multiple spot；It is described
Two outlets are arranged in ash cellar 7, correspond to No. two circulating ash batchers 9 and bulk cement truck respectively, two outlets are respectively provided with switch valve, valve
Door is used and is pneumatically or electrically controlled；Circulating ash is delivered to burner hearth 1 by circulating ash using single-point or multiple spot after the ash cellar 7, after
Flowmeter is arranged in circulating ash conveyance conduit, and for conveying circulating ash quantity control, rear circulating ash conveying air source, which uses, is matched in feed back
Hp fluid air, existing station-service compressed air or the newly-increased high pressure fluidization fan that the high pressure fluidization fan 6 of device 3 provides；It is described
8 outlet burner hearth 1 of run coal bin.
As preferred embodiments of the present invention, the cycle ash cooler 4 is using by its own gravity whereabouts
Moving bed cooler or the mechanical rotation cooler for relying on external impetus.It is highly preferred that the cycle ash cooler 4 using according to
The moving bed cooler to fall by its own gravity.
As preferred embodiments of the present invention, the No.1 circulating ash batcher 5 and No. two circulating ash batchers 9
Using vertical or horizontal rotary batcher.
As preferred embodiments of the present invention, the switch valve of cycle 4 entrance of the ash cooler setting uses gas
Dynamic control.
As preferred embodiments of the present invention, the circulating ash uses pneumatic conveying mode, conveying air source to use
It is matched in the hp fluid air that the high pressure fluidization fan 6 of material returning device 3 provides.
As preferred embodiments of the present invention, after the ash cellar 7, circulating ash conveying air source, which uses, is matched in feed back
The hp fluid air that the high pressure fluidization fan 6 of device 3 provides.
The control method of the described circulating fluidized bed boiler cycle ash handing system, in the ash-laden gas be discharged by burner hearth 1
Big department's ash particle by separator 2 trap after, through material returning device 3 enter cycle ash cooler 4, by No.1 circulating ash batcher 5
Circulating ash is delivered to burner hearth 1, ash cellar 7 or run coal bin 8；Circulating ash in ash cellar 7 is delivered to by No. two circulating ash batchers 9
Burner hearth or automobile outward transport；Into run coal bin 8 circulating ash mixed with raw coal after be directly entered burner hearth 1；In normal operation, No.1
Switching is delivered to burner hearth 1, ash cellar 7 or run coal bin 8 to circulating ash batcher 5 on demand；If circulating ash quantity is too low, then No.1 of stopping transport is followed
Ring ash batcher 5 is delivered to burner hearth 1 by No. two circulating ash batchers 9 by circulating ash is stored.
The circulating ash conveying control that the ash cellar 7 is discharged, automatically engages operation and can by ingredient and the granularity of as-fired coal
Realize quantitative control.
Embodiment 1
As shown in Figure 1, the circulating fluidized bed boiler of the utility model recycles ash handing system, the dust-laden being discharged by burner hearth 1
After big department's ash particle in flue gas is trapped by separator 2, enters cycle ash cooler 4 through material returning device 3, given by No.1 circulating ash
Circulating ash is delivered to burner hearth 1 by material machine 5.
Embodiment 2
As shown in Figure 1, the circulating fluidized bed boiler of the utility model recycles ash handing system, the dust-laden being discharged by burner hearth 1
After big department's ash particle in flue gas is trapped by separator 2, enters cycle ash cooler 4 through material returning device 3, given by No.1 circulating ash
5 circulating ash of material machine is delivered to ash cellar 7.Circulating ash in ash cellar 7 can be delivered to burner hearth or automobile by No. two circulating ash batchers 9
Outward transport.In normal operation, if circulating ash quantity is too low, the No.1 that can stop transport circulating ash batcher 5 will by No. two circulating ash batchers 9
Storage circulating ash is delivered to burner hearth 1.
Embodiment 3
As shown in Figure 1, the circulating fluidized bed boiler of the utility model recycles ash handing system, the dust-laden being discharged by burner hearth 1
After big department's ash particle in flue gas is trapped by separator 2, enters cycle ash cooler 4 through material returning device 3, given by No.1 circulating ash
Circulating ash is delivered to run coal bin 8 by material machine 5.Into run coal bin 8 circulating ash mixed with raw coal after be directly entered burner hearth 1.
Claims (7)
1. a kind of circulating fluidized bed boiler recycles ash handing system, it is characterised in that：Applied to new-built unit or in-service unit；
Including the cycle ash cooler (4) in material returning device (3) lower part is arranged, switch valve, valve is arranged in cycle ash cooler (4) entrance
Using pneumatically or electrically controlling, setting hand operated gate valve in outlet is used to be arranged the No.1 in cycle ash cooler (4) lower part and follows door
Ring ash batcher (5) overhauls；Circulating ash uses pneumatic conveying mode, and conveying air source is using the high-pressure spray for being matched in material returning device (3)
Change the hp fluid air that wind turbine (6) provides；It is described to divide three tunnels through recycling ash cooler (4) circulating ash outlet after cooling, respectively
Connect burner hearth (1), ash cellar (7) and run coal bin (8) so that switching is delivered to burner hearth (1), ash to circulating ash after cooling respectively on demand
Storehouse (7) or run coal bin (8), until burner hearth (1) and run coal bin (8) conveying branch line are respectively provided with flowmeter, for conveying circulating ash quantity
Control, until circulating ash is delivered to burner hearth (1) by the circulating ash of burner hearth (1) using single-point or multiple spot；Ash cellar (7) setting two
A outlet corresponds to No. two circulating ash batchers (9) and bulk cement truck respectively, and two outlets are respectively provided with switch valve, and valve uses gas
Dynamic or Electronic control；Circulating ash is delivered to burner hearth (1) to the ash cellar (7) by circulating ash using single-point or multiple spot afterwards, rear to recycle
Flowmeter is arranged in grey conveyance conduit, and for conveying circulating ash quantity control, rear circulating ash conveying air source, which uses, is matched in material returning device (3)
High pressure fluidization fan (6) provide hp fluid air；Run coal bin (8) the outlet burner hearth (1).
2. a kind of circulating fluidized bed boiler according to claim 1 recycles ash handing system, it is characterised in that：The cycle
Ash cooler (4) is cooled down using the moving bed cooler to fall by its own gravity or by the mechanical rotation of external impetus
Device.
3. a kind of circulating fluidized bed boiler according to claim 1 recycles ash handing system, it is characterised in that：The cycle
Ash cooler (4) is using the moving bed cooler to fall by its own gravity.
4. a kind of circulating fluidized bed boiler according to claim 1 recycles ash handing system, it is characterised in that：The No.1
Circulating ash batcher (5) and No. two circulating ash batchers (9) use vertical or horizontal rotary batcher.
5. a kind of circulating fluidized bed boiler according to claim 1 recycles ash handing system, it is characterised in that：The cycle
The switch valve of ash cooler (4) entrance setting uses pneumatic control.
6. a kind of circulating fluidized bed boiler according to claim 1 recycles ash handing system, it is characterised in that：The cycle
Ash uses pneumatic conveying mode, the high pressure fluidisation that conveying air source is provided using the high pressure fluidization fan (6) for being matched in material returning device (3)
Wind.
7. a kind of circulating fluidized bed boiler according to claim 1 recycles ash handing system, it is characterised in that：The ash cellar
(7) hp fluid air that circulating ash conveying air source is provided using the high pressure fluidization fan (6) for being matched in material returning device (3) afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721396416.5U CN207729583U (en) | 2017-10-25 | 2017-10-25 | A kind of circulating fluidized bed boiler cycle ash handing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721396416.5U CN207729583U (en) | 2017-10-25 | 2017-10-25 | A kind of circulating fluidized bed boiler cycle ash handing system |
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| Publication Number | Publication Date |
|---|---|
| CN207729583U true CN207729583U (en) | 2018-08-14 |
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ID=63091076
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721396416.5U Active CN207729583U (en) | 2017-10-25 | 2017-10-25 | A kind of circulating fluidized bed boiler cycle ash handing system |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654997A (en) * | 2017-10-25 | 2018-02-02 | 中国华能集团清洁能源技术研究院有限公司 | A kind of CFBB circulation ash handing system and control method |
-
2017
- 2017-10-25 CN CN201721396416.5U patent/CN207729583U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654997A (en) * | 2017-10-25 | 2018-02-02 | 中国华能集团清洁能源技术研究院有限公司 | A kind of CFBB circulation ash handing system and control method |
| CN107654997B (en) * | 2017-10-25 | 2023-05-30 | 中国华能集团清洁能源技术研究院有限公司 | Circulating ash control system and method for circulating fluidized bed boiler |
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