CN106996559A - A kind of low-nitrogen discharged CFBB - Google Patents
A kind of low-nitrogen discharged CFBB Download PDFInfo
- Publication number
- CN106996559A CN106996559A CN201710202582.5A CN201710202582A CN106996559A CN 106996559 A CN106996559 A CN 106996559A CN 201710202582 A CN201710202582 A CN 201710202582A CN 106996559 A CN106996559 A CN 106996559A
- Authority
- CN
- China
- Prior art keywords
- ash
- flying dust
- boiler
- dust return
- return box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 10
- 239000002956 ash Substances 0.000 claims abstract description 27
- 239000000428 dust Substances 0.000 claims abstract description 17
- 238000002485 combustion reaction Methods 0.000 claims abstract description 9
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 9
- 241001482108 Alosa pseudoharengus Species 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 7
- 239000010883 coal ash Substances 0.000 claims abstract description 6
- 239000003245 coal Substances 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000003546 flue gas Substances 0.000 claims description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
- F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
- F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/24—Devices for removal of material from the bed
- F23C10/26—Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
- F23C10/30—Control devices specially adapted for fluidised bed, combustion apparatus for controlling the level of the bed or the amount of material in the bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
Abstract
A kind of low-nitrogen discharged CFBB, it includes being provided with the boiler of burner hearth, cyclone separator is connected in the top smoke gas port of boiler, the top exhanst gas outlet of the cyclone separator connects chimney by a horizontal flue, described cyclone separator bottom is connected with flying dust return box by the returning charge leg connected, and the flying dust return box mitered is in the gray back mouthful that boiler furnace lower combustion chamber side wall is opened up；Described chimney bottom is also connected to an electrostatic precipitator, the bottom of the electrostatic precipitator is provided with two Room ash buckets, wherein a Room ash bucket bottom connects the intermediate bin for storing part coal ash, after VFC of the intermediate bin by the screw(-type) feeder of bottom, described flying dust return box is connected to through roots blower and airduct conveying, another room ash bucket connects grey storehouse by connecting defeated ash silo pump；It has simple in construction, using easy to operate, good reliability, by increasing ash quantity and ash concentration in burner hearth, reduces discharged nitrous oxides, the features such as improving environmental pollution.
Description
Technical field
The present invention relates to a kind of low-nitrogen discharged CFBB, belong to boiler plant technical field.
Background technology
Traditional CFBB, to adapt to wide load condition operation, fire box temperature is rated at more than 960 DEG C,
At so high temperature, the concentration of emission of nitrogen oxides is more than 350mg/Nm3, to reduce the concentration of emission of nitrogen oxides, reduction
Ignition temperature in burner hearth is one of most important option, wherein ash quantity and ash concentration have to improve the capacity of heat transmission in increase burner hearth
There is obvious effect；In the prior art, the matching used cyclone separator of CFBB preferably considers reduction flue gas resistance
Power, separative efficiency is relatively low, the half of the universal not enough environment-friendly boiler of ash concentration in burner hearth.
The content of the invention
It is an object of the invention to overcome the shortcomings of that prior art is present, and provide a kind of simple in construction, use operation side
Just, good reliability, by increasing ash quantity and ash concentration in burner hearth, reduces discharged nitrous oxides, improves the low nitrogen of environmental pollution
The CFBB of discharge.
The purpose of the present invention is completed by following technical solution, a kind of low-nitrogen discharged CFBB,
It includes being provided with boiler of burner hearth, and cyclone separator is connected in the top smoke gas port of boiler, the cyclone separator it is upper
Portion's exhanst gas outlet connects chimney by a horizontal flue, and described cyclone separator bottom is connected by the returning charge leg connected
Flying dust return box is connected to, the flying dust return box mitered is in the gray back mouthful that boiler furnace lower combustion chamber side wall is opened up.
As preferred：Described chimney bottom is also connected to an electrostatic precipitator, and the bottom of the electrostatic precipitator is set
Two Room ash buckets are equipped with, wherein a Room ash bucket bottom connects the intermediate bin for storing part coal ash, the spiral that the intermediate bin passes through bottom
After the VFC of batcher, described flying dust return box is connected to through roots blower and airduct conveying, another room ash bucket passes through
Connect the defeated grey storehouse of ash silo pump connection.
As preferred：It is serially connected with described airduct and is provided with two flying dusts on the grey motor-driven valve of benefit, described boiler side and returns
Hopper, the flying dust return box connects the gray back mouthful of boiler furnace lower combustion chamber side wall, First air is vertical in combustion chamber
At import top, the position of relative coal feeding hole.
The present invention is the transformation to existing boiler, with simple in construction, using easy to operate, good reliability, passes through increase
Ash quantity and ash concentration in burner hearth, reduce discharged nitrous oxides, the features such as improving environmental pollution.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be described in detail：It is of the present invention a kind of low-nitrogen discharged shown in Fig. 1
CFBB, it includes being provided with the boiler 13 of burner hearth 2, and cyclonic separation is connected in the top smoke gas port 14 of boiler
Device 3, the top exhanst gas outlet of the cyclone separator 3 connects chimney 15, described cyclone separator by a horizontal flue 4
3 bottoms are connected with flying dust return box 6 by the returning charge leg 5 connected, and the mitered of flying dust return box 6 fires in the bottom of boiler furnace 2
Burn in the gray back mouthful 16 that the side wall of room 1 is opened up.
Shown in figure, the described bottom of chimney 15 is also connected to an electrostatic precipitator 6, under the electrostatic precipitator 6
Portion is provided with two Room ash buckets 8, wherein a Room ash bucket bottom connects the intermediate bin 9 for storing part coal ash, the intermediate bin 9 passes through bottom
Screw(-type) feeder 10 VFC after, conveyed through roots blower 11 and airduct 17 and be connected to described flying dust return box 6, separately
One Room ash bucket connects grey storehouse by connecting defeated ash silo pump 12.
It is serially connected with airduct 17 of the present invention on the grey motor-driven valve 7 of benefit, the described side of boiler 13 and is provided with two flying dusts
Return box 6, the gray back mouthful 16 of the side wall of 2 lower combustion chamber of the connection boiler furnace of flying dust return box 61 is in combustion chamber 1, one
At secondary wind vertical inlet top, the position of relative coal feeding hole 18.
The present invention mainly uses an electrostatic precipitator ash bucket to be changed to two Room, and part coal ash is stored in intermediate bin, passes through spiral shell
Batcher VFC is revolved, is returned to by the strength of roots blower in the flying dust return box of boiler, controlled manner regulation burner hearth
Interior coal ash concentration, realizes that ash concentration is synchronous under different operating modes, reduces the concentration of emission of nitrogen oxides, reduces atmosphere pollution row
Put.
Claims (3)
1. a kind of low-nitrogen discharged CFBB, it includes being provided with the boiler of burner hearth, and flue gas is gone out on the top of boiler
Mouth is connected to cyclone separator, and the top exhanst gas outlet of the cyclone separator passes through a horizontal flue and connects chimney, and it is special
Levy and be that described cyclone separator bottom is connected with flying dust return box by the returning charge leg connected, the flying dust return box mitered
In in the gray back mouthful that boiler furnace lower combustion chamber side wall is opened up.
2. low-nitrogen discharged CFBB according to claim 1, it is characterised in that described chimney bottom
Portion is also connected to an electrostatic precipitator, and the bottom of the electrostatic precipitator is provided with two Room ash buckets, wherein a Room ash bucket bottom connects storage
There is the intermediate bin of part coal ash, after VFC of the intermediate bin by the screw(-type) feeder of bottom, through roots blower and wind
Pipe conveying is connected to described flying dust return box, and another room ash bucket connects grey storehouse by connecting defeated ash silo pump.
3. low-nitrogen discharged CFBB according to claim 2, it is characterised in that concatenated on described airduct
Have and two flying dust return boxes are provided with the grey motor-driven valve of benefit, described boiler side, under the flying dust return box connection boiler furnace
The gray back of portion's sidewall of combustion chamber mouthful, at First air vertical inlet top in combustion chamber, the position of relative coal feeding hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710202582.5A CN106996559A (en) | 2017-03-30 | 2017-03-30 | A kind of low-nitrogen discharged CFBB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710202582.5A CN106996559A (en) | 2017-03-30 | 2017-03-30 | A kind of low-nitrogen discharged CFBB |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106996559A true CN106996559A (en) | 2017-08-01 |
Family
ID=59434015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710202582.5A Pending CN106996559A (en) | 2017-03-30 | 2017-03-30 | A kind of low-nitrogen discharged CFBB |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106996559A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855089A (en) * | 2019-04-10 | 2019-06-07 | 南昌航空大学 | A kind of automatic returning charge ash exhauster of pulley-type |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050287058A1 (en) * | 2004-06-23 | 2005-12-29 | Foster Wheeler Energia Oy | Method of reducing sulfur dioxide emissions of a circulating fluidized bed boiler |
| CN205402701U (en) * | 2016-02-04 | 2016-07-27 | 河南心连心化肥有限公司 | Quick adjustment circulating fluidized bed boiler load's device |
| CN206608947U (en) * | 2017-03-30 | 2017-11-03 | 德清县中能热电有限公司 | Low-nitrogen discharged CFBB |
-
2017
- 2017-03-30 CN CN201710202582.5A patent/CN106996559A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050287058A1 (en) * | 2004-06-23 | 2005-12-29 | Foster Wheeler Energia Oy | Method of reducing sulfur dioxide emissions of a circulating fluidized bed boiler |
| CN205402701U (en) * | 2016-02-04 | 2016-07-27 | 河南心连心化肥有限公司 | Quick adjustment circulating fluidized bed boiler load's device |
| CN206608947U (en) * | 2017-03-30 | 2017-11-03 | 德清县中能热电有限公司 | Low-nitrogen discharged CFBB |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855089A (en) * | 2019-04-10 | 2019-06-07 | 南昌航空大学 | A kind of automatic returning charge ash exhauster of pulley-type |
| CN109855089B (en) * | 2019-04-10 | 2024-03-15 | 南昌航空大学 | Pulley type automatic material returning and ash discharging device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170801 |