CN208920041U - Cyclone furnace denitrating system - Google Patents
Cyclone furnace denitrating system Download PDFInfo
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- CN208920041U CN208920041U CN201821298697.5U CN201821298697U CN208920041U CN 208920041 U CN208920041 U CN 208920041U CN 201821298697 U CN201821298697 U CN 201821298697U CN 208920041 U CN208920041 U CN 208920041U
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- Prior art keywords
- spout
- cyclone
- sncr
- furnace
- burner
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- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims abstract description 34
- 230000002829 reductive effect Effects 0.000 claims abstract description 34
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- 238000003860 storage Methods 0.000 claims abstract description 17
- 239000002893 slag Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 13
- 239000003245 coal Substances 0.000 description 11
- 229910021529 ammonia Inorganic materials 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 9
- 239000007921 spray Substances 0.000 description 9
- 239000003513 alkali Substances 0.000 description 8
- 239000000428 dust Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 239000002817 coal dust Substances 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 210000000038 chest Anatomy 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000001535 kindling effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model provides cyclone furnace denitrating system, including the cyclone cylinder burner and reducing agent storage tank connected with cyclone furnace；Top in cyclone furnace burner hearth is provided with the first spout of SNCR, and burner hearth flue is provided with the second spout of SNCR in top；On the axially vertical lateral wall for being mounted on cyclone furnace lower furnace portion of cyclone cylinder burner, the first spout of amino reductive is set on the side wall of cyclone cylinder burner, the second spout of amino reductive is set on the burner hearth sidewall of the outer top of cyclone cylinder burner；The axial direction of cyclone cylinder burner is arranged First air entrance, the tangential oppositely arranged Secondary Air entrance of side wall；Reducing agent storage tank by reducing agent delivery pipe respectively with the first spout of SNCR, the second spout connection of the second spout of SNCR, the first spout of amino reductive and amino reductive.The utility model process flow is simple, makes full use of the storage conveying device of SNCR denitration reducing agent, does not need to increase new reducing agent storage conveying device, forms new combined denitration system, realizes cyclone furnace NOxCompared with low emission.
Description
Technical field
The utility model relates to environmental technology fields, specially cyclone furnace denitrating system.
Background technique
Special coal types of the high-alkali coal as rich reserves lead to pot since the alkali metal contents such as Na, K are generally higher in coal
The problems such as furnace stains by force, slagging is serious, influences the safe and economical operation for using high-alkali coal burning boiler.
Wet bottom boiler combustion technology is the combustion technology that a kind of combustion intensity is high, retention efficiency is high, dust content is few.
It is serious etc. that it overcomes furnace wall cooling slagging when boiler with dry bottom furnace uses clinker(ing) coal kind, heating surface contamination/dust stratification/slagging
Disadvantage is especially suitable especially for clinker(ing) coal kind.
Cyclone furnace is a kind of wet bottom boiler.Referred to as whirlwind fires air driven fuel particle when rotary combustion in cylinder
It burns, the equipment for organizing this combustion system becomes cyclone furnace.The cylinder that burning is substantially carried out in cyclone furnace is known as cyclone cylinder, and one
Cyclone furnace can have one or several cyclone cylinders.Cinder is sticked to formation liquid slag film, liquid on cyclone wall because of high temperature melting
Slag tap is formed outside slag discharge cylinder.
Use high-alkali coal technology using cyclone furnace, can solve use at present high-alkali coal burning boiler it is generally existing it is strong contamination,
The problems such as slagging, is serious, improves boiler controller system safety, economy.But since whirlwind cylinder roasting intensity is big, temperature is high, heating power
Type NOxProduction quantity is big, cyclone furnace NOxDischarge is universal higher, usually in 600~1200mg/s3；On the other hand, alkali gold in high-alkali coal
It is high to belong to content, will lead to SCR catalyst poisoning, therefore SCR denitration technology is not suitable for high-alkali coal unit.Current low nitrogen burning skill
Art, SNCR technical tie-up application are also difficult to that the cyclone furnace NO of high-alkali coal will be usedxDischarge is reduced to the discharge of domestic license at present
Standard.
Utility model content
Aiming at the problems existing in the prior art, the utility model provides cyclone furnace denitrating system and method, process flow
Simply, the storage conveying device for making full use of SNCR denitration reducing agent does not need to increase new reducing agent storage conveying device, shape
The combined denitration system of Cheng Xin realizes cyclone furnace NOxCompared with low emission.
The utility model is to be achieved through the following technical solutions:
Cyclone furnace denitrating system includes the cyclone cylinder burner and reducing agent storage tank connected with cyclone furnace；
Top in the cyclone furnace burner hearth is provided with the first spout of SNCR, at the top of burner hearth flue in be provided with SNCR the
Two spouts；
On the axially vertical lateral wall for being mounted on cyclone furnace lower furnace portion of the cyclone cylinder burner, cyclone cylinder burner
Side wall on be provided with the first spout of amino reductive, be provided with amino reduction on the burner hearth sidewall of the outer top of cyclone cylinder burner
The second spout of agent；The axial direction of the cyclone cylinder burner is provided with First air entrance, and side wall is tangentially oppositely arranged two
Secondary wind entrance；
The reducing agent storage tank by reducing agent delivery pipe respectively with the first spout of SNCR, the second spout of SNCR, amino
The second spout connection of the first spout of reducing agent and amino reductive.
Preferably, the cyclone cylinder burner is set gradually multiple along the vertical direction.
Preferably, the cyclone furnace burner hearth bottom is provided with furnace bottom slag bath.
Preferably, the first spout of SNCR is in the top being arranged horizontally in cyclone furnace burner hearth.
Preferably, the second spout of SNCR is arranged in the flue at the top of burner hearth flue in vertical direction.
Preferably, the classification wind of coupling part Secondary Air is provided on the burner hearth sidewall below first spout of SNCR
Entrance.
Compared with prior art, the utility model has technical effect beneficial below:
The utility model is used is arranged interior setting SNCR at the top of the first spout of SNCR and burner hearth flue in cyclone furnace burner hearth
Second spout forms SNCR technology, the first spout of amino reductive is arranged in cyclone cylinder combustor sidewalls and in cyclone cylinder burner
The second spout of amino reductive is set on the burner hearth sidewall of outer top and forms spray ammonia technology, while being arranged on cyclone cylinder burner
First air entrance and Secondary Air entrance form low-carbon combustion technology, this cyclone furnace high-temperature area spray ammonia technology and low nitrogen burning
Technology, SNCR technical tie-up application can be effectively by NOxDischarge is reduced to reduced levels, and treatment effect is obvious；High temperature simultaneously
Reducing zone spray ammonia technology and SNCR technology share same set of reducing agent storage tank and transportation system, and system is simple, do not need to increase new
Reducing agent storage conveying device, economy is high.
The utility model is by vertically arranged multiple cyclone cylinder burners, to ensure treatment effeciency and the place of denitrating system
Effect is managed, cyclone furnace NO can be effectively reduced using spray ammonia technology in high temperature reduction areaxDischarge；Simultaneously using at cyclone furnace burner hearth bottom
The furnace bottom slag bath of portion's setting, timely the liquid slag generated in denitrification process is discharged, it is ensured that denitrating system stable operation.
The utility model using in cyclone furnace burner hearth different location and different directions arrangement SNCR spout by the way of, energy
The denitration process effect to flue gas is effectively ensured；Moreover, part Secondary Air injects whirlwind by classification wind entrance as classification wind
Furnace upper furnace reduces the oxygen content in hearth combustion region, and making regional area in furnace is integrally in reducing atmosphere, also for high temperature
Former area's spray ammonia creates conditions.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model
In figure: First air entrance 1, Secondary Air entrance 2 are classified wind entrance 3, the first spout of amino reductive 4, amino reduction
The second spout of agent 5, the first spout of SNCR 6, the second spout of SNCR 7, furnace bottom slag bath 8, reducing agent storage tank 9, reducing agent conveyance conduit
10。
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings, it is described be the explanation to the utility model and
It is not to limit.
Embodiment 1
The utility model is as shown in Figure 1, cyclone furnace is equipped with two rows cyclone cylinder burner；Cyclone cylinder burner it is primary
Wind is by First air entrance 1 from cyclone cylinder axially into the Secondary Air of cyclone cylinder burner passes through Secondary Air entrance 2 from cyclone cylinder
Side wall tangentially enter, part Secondary Air from the classification wind entrance 3 of cyclone furnace upper furnace as classification wind enter in burner hearth；
The first spout of amino reductive 4 is arranged on the barrel of cyclone cylinder burner, and the second spout of amino reductive 5 is arranged in cyclone cylinder
On the burner hearth sidewall of the outer top of burner；The first spout of SNCR is arranged in the top in burner hearth, and the second spout of SNCR is arranged in furnace
In the top flue of thorax；Cyclone furnace burner hearth bottom furnace bottom slag bath 8, and pass through amino reductive conveyance conduit 10 and amino reductive
Storage tank 9 is connected to.
Coal dust is carried by First air, and the First air entrance 1 through cyclone cylinder axial direction enters cyclone cylinder burner；Secondary Air is through revolving
The Secondary Air entrance 2 of air duct side wall enters cyclone cylinder burner, and part Secondary Air passes through classification as classification wind in upper boiler
Wind entrance 3 enters burner hearth.Coal dust enters burner hearth after catching fire, burning in cyclone cylinder burner.Due to warm in cyclone cylinder burner
Degree is high, forms liquid slag after coal dust firing and flows into the furnace bottom slag bath 8 of burner hearth after liquid slag flows out cyclone cylinder burner；Cigarette
Gas carries flying dust and enters back-end ductwork after burner hearth and top flue.
Amino reductive is stored in reducing agent storage tank 9, is transported to high temperature reduction area amino through reducing agent conveyance conduit 10
The first spout of reducing agent 4, the second spout of amino reductive 5 and the first spout of SNCR 6 and the second spout of SNCR 7.According to difference
The in-furnace temperature distribution and NO that combustion conditions generatexDistribution situation, amino reductive spout and the SNCR spray that optimum choice puts into operation
Mouthful.In general, when unit load is more than or equal to 75%, bulk temperature level is relatively high in burner hearth, and put into operation ammonia in high temperature reduction area
The second spout of base reductant 5, SNCR, which puts into operation, is arranged in the second spout of SNCR 7 of top flue；When unit load is less than 75%, furnace
Bulk temperature level is relatively low in thorax, and put into operation the first spout of amino reductive 4 in high temperature reduction area, and SNCR, which puts into operation, to be arranged on burner hearth
First spout of SNCR 6 in portion.In addition the first spout of amino reductive 4, amino reductive second can also be sprayed according to the actual situation
Mouth 5,7 any combination of the first spout of SNCR 6 and the second spout of SNCR, to achieve the purpose that NO_x Reduction by Effective.
In practical applications, the course of work is as follows:
Step 1: coal dust is carried by First air, is fired from cyclone cylinder burner axially into cyclone cylinder by First air entrance 1
Burner, Secondary Air enter cyclone cylinder burner from cyclone cylinder combustor sidewalls by Secondary Air entrance 2, meanwhile, part is secondary
Wind is also entered inside burner hearth as classification wind by classification wind entrance 3；
Step 2: the coal dust into cyclone cylinder burner, the kindling of high temperature reduction area, burning in cyclone cylinder burner
It forms liquid slag afterwards and carries the flue gas of flying dust；Being classified wind reduces the oxygen content of furnace combustion zone, makes regional area in burner hearth
Whole is in reducing atmosphere, is created conditions to spray into amino reductive；Open the first spout of amino reductive 4 or amino reductive
Second spout 5, by reducing agent storage tank 9 ammonia or the amino reductives such as urea spray into cyclone cylinder burner, carry flying dust
The NO that flue gas generates at high temperaturexN is partially reduced to after amino reductive effect2；
Step 3: the furnace bottom slag bath 8 of liquid slag inflow burner hearth bottom；Treated carries the flue gas of flying dust along burner hearth
It flows from bottom to top, opens the first spout of SNCR 6 or the second spout of SNCR 7, by the ammonia or the ammonia such as urea in reducing agent storage tank 9
Base reductant sprays into cyclone furnace burner hearth, with remaining NO in carrying flying dust flue gasxSufficiently N is reduced to after effect2And pass through burner hearth
Back-end ductwork discharge.
In step 2 and step 3, when unit load is less than 75%, bulk temperature level is relatively low in burner hearth, and put into operation amino
The first spout of reducing agent 4 and the first spout of SNCR 6；When unit load is more than or equal to 75%, bulk temperature level compares in burner hearth
Height, put into operation the second spout of amino reductive 5 and the second spout of SNCR 7.
Claims (6)
1. cyclone furnace denitrating system, it is characterised in that: including the cyclone cylinder burner and reducing agent storage tank connected with cyclone furnace
(9)；
Top in the cyclone furnace burner hearth is provided with the first spout of SNCR (6), at the top of burner hearth flue in be provided with SNCR the
Two spouts (7)；
On the axially vertical lateral wall for being mounted on cyclone furnace lower furnace portion of the cyclone cylinder burner, the side of cyclone cylinder burner
It is provided with the first spout of amino reductive (4) on wall, is provided with amino reduction on the burner hearth sidewall of the outer top of cyclone cylinder burner
The second spout of agent (5)；The axial direction of the cyclone cylinder burner is provided with First air entrance (1), and side wall is tangentially reversely set
It is equipped with Secondary Air entrance (2)；
The reducing agent storage tank (9) by reducing agent delivery pipe (10) respectively with the first spout of SNCR (6), the second spout of SNCR
(7), the first spout of amino reductive (4) is connected to the second spout of amino reductive (5).
2. cyclone furnace denitrating system according to claim 1, it is characterised in that: the cyclone cylinder burner is along vertical side
It is multiple to setting gradually.
3. cyclone furnace denitrating system according to claim 1, it is characterised in that: the cyclone furnace burner hearth bottom is provided with
Furnace bottom slag bath (8).
4. cyclone furnace denitrating system according to claim 1, it is characterised in that: the first spout of SNCR (6) is in horizontally disposed
Top in cyclone furnace burner hearth.
5. cyclone furnace denitrating system according to claim 1, it is characterised in that: the second spout of SNCR (7) is in vertical direction
It is arranged in the flue at the top of burner hearth flue.
6. cyclone furnace denitrating system according to claim 1 or 5, it is characterised in that: under first spout of SNCR (6)
The classification wind entrance (3) of coupling part Secondary Air is provided on the burner hearth sidewall of side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821298697.5U CN208920041U (en) | 2018-08-13 | 2018-08-13 | Cyclone furnace denitrating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821298697.5U CN208920041U (en) | 2018-08-13 | 2018-08-13 | Cyclone furnace denitrating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208920041U true CN208920041U (en) | 2019-05-31 |
Family
ID=66702462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821298697.5U Active CN208920041U (en) | 2018-08-13 | 2018-08-13 | Cyclone furnace denitrating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208920041U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058979A (en) * | 2018-08-13 | 2018-12-21 | 中国华能集团有限公司 | Cyclone furnace denitrating system and method |
| CN113074384A (en) * | 2021-04-16 | 2021-07-06 | 华北水利水电大学 | Vertical cyclone burner parallel pipeline flow distribution system |
-
2018
- 2018-08-13 CN CN201821298697.5U patent/CN208920041U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058979A (en) * | 2018-08-13 | 2018-12-21 | 中国华能集团有限公司 | Cyclone furnace denitrating system and method |
| CN109058979B (en) * | 2018-08-13 | 2023-11-03 | 中国华能集团有限公司 | Cyclone furnace denitration system and method |
| CN113074384A (en) * | 2021-04-16 | 2021-07-06 | 华北水利水电大学 | Vertical cyclone burner parallel pipeline flow distribution system |
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