CN109404950A - A kind of boiler flue gas treatment system of high efficiency, low cost - Google Patents
A kind of boiler flue gas treatment system of high efficiency, low cost Download PDFInfo
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- CN109404950A CN109404950A CN201811128152.4A CN201811128152A CN109404950A CN 109404950 A CN109404950 A CN 109404950A CN 201811128152 A CN201811128152 A CN 201811128152A CN 109404950 A CN109404950 A CN 109404950A
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- Prior art keywords
- high temperature
- combustion
- boiler
- gasification furnace
- heating gas
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
- F23J2215/101—Nitrous oxide (N2O)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of boiler flue gas treatment systems of high efficiency, low cost, including strong swirling combustion gasification furnace, the strong swirling combustion gasification furnace gasify heating gas out be sent into fluid-bed sweetening reactor, heating gas after the fluid-bed sweetening reactor desulfurization is sent into high-temperature and low-oxygen combustion device, the high-temperature and low-oxygen combustion device is located at dispersed combustion electricity generation boiler lower part, the dispersed combustion electricity generation boiler combustion product is discharged after SNCR mixing reduction reactor denitration, and the SNCR mixing reduction reactor is located at the horizontal flue after lengthening.The beneficial effects of the invention are as follows the fume treatments for simplifying conventional boiler system, reduce cost, and improve desulfurization off sulfide effect.Realize dry flue gas discharge.
Description
Technical field
The present invention relates to boiler smoke process field, in particular to a kind of novel station boiler takes off denitration dust removal system.
Background technique
Station boiler is one of three big generating equipments, is the baseline power of China's economic development.It is right recently as country
The pay attention to day by day of environmental issue, to the increasingly strict of atmosphere pollutants emission standards.Environmental protection and energy saving become China electric power industry
The important directions of structural adjustment, Thermal Power Generation Industry are actively pushed forward structure optimization upgrading under the policy guidance of " above pressing greatly small ", are closed
Large quantities of efficiencies low, seriously polluted station boilers.Therefore in Thermal Power Generation Industry development, the improvement of station boiler will be wherein heavy
One wanted.
Station boiler is exactly as its name suggests boiler used in power plants generating electricity.Since power plant generallys use steam-electric power, coal is consumed
Amount is big, therefore the efficiency of station boiler and environmental issue become an important factor for restricting station boiler development.And wherein pot
Influence of the discharge of kiln gas to environment is huge.As in recent years, after northern area enters winter, the frequent haze that meets with is invaded and harassed,
And NOx is then one of the important root for leading to serious haze weather.The formation of acid rain then has very big relationship with the discharge of sulphur.Cigarette
The lesser floating dust of partial size can float in atmosphere for a long time after going out in dirt, be easy to make one to suffer from respiratory disease, heart disease etc..Cause
This country improves the requirement to boiler smoke discharge, and the efficiency for improving desulphurization denitration dedusting, which becomes, is badly in need of solution in station boiler
Certainly the problem of.
Currently, the processes such as desulphurization denitration dedusting of station boiler can not carry out in furnace, it can only be at boiler tail
Reason.Then advanced deduster of crossing carries out denitration by SCR and finally enters back into dedusting using desulfurizer using desulfurizing tower
Device dedusting.A whole set of complex procedures, cost is high, inefficiency.And because being caused in last processed flue gas using wet desulphurization
Containing vapor, white cigarette processing is also carried out.
Therefore it is badly in need of a kind of efficient and inexpensive boiler flue gas treatment system, solves the above problems.
Summary of the invention
To solve the above problems, the present invention relates to a kind of boiler flue gas treatment systems of high efficiency, low cost.The system knot
Structure is reasonable, effectively raises station boiler desulphurization denitration efficiency of dust collection, and reduce cost.
Realize that the present invention program of above-mentioned purpose is a kind of efficient and inexpensive boiler flue gas treatment system, along cigarette
Flow of air direction has been sequentially arranged strong swirling combustion gasification furnace, heating gas attemperator, fluid-bed sweetening reactor, dispersed combustion hair
Electric boiler, SNCR mixing reduction reactor, sack cleaner；
It is equipped with coal dust spout above the strong swirling combustion gasification furnace, is equipped with high temperature on the left of the strong swirling combustion gasification furnace
Tangential introduction of air feeds spout, and the strong swirling combustion gasification furnace lower part is equipped with liquid slag slag-drip opening, the liquid slag deslagging
Mouth lower part is equipped with clinker pond, is equipped with heating gas fairlead above the strong swirling combustion gasification furnace；
The heating gas fairlead is connected with lower section heating gas attemperator；
It is equipped with boiler feedwater mouth below the heating gas attemperator, and is connected with fluid-bed sweetening reactor；
The fluid-bed sweetening reactor lower left side is equipped with coal gas of high temperature entrance, fluid-bed sweetening reactor upper left side
Equipped with limestone/lime spout, fluid-bed sweetening reactor upper right side is equipped with clean heating gas fairlead, and lower right side is equipped with
Desulfurization product discharge pipe；
The cleaning heating gas fairlead and the high temperature clean gas hypoxemia for being located at dispersed combustion electricity generation boiler body lower part
Burner is connected；
High temperature clean gas low oxygen combustion device, the dispersed combustion are equipped at left and right sides of the dispersed combustion electricity generation boiler
Electricity generation boiler upper left side is equipped with ammonium hydroxide/urea side spout, is equipped on ammonium hydroxide/urea and sprays above the dispersed combustion electricity generation boiler
Mouthful, SNCR mixing reduction reactor, the dispersed combustion electricity generation boiler are equipped at the dispersed combustion electricity generation boiler horizontal flue
Tail portion is successively arranged high temperature superheater, gasification furnace gasification high-temperature air preheater, low temperature superheater, higher level's economizer, higher level
Air preheater, junior's economizer, junior's air preheater；
Gasification furnace gasification high-temperature air preheater is equipped with gasification furnace gasification high temperature air pipeline and strong whirlpool fires
It burns gasification furnace to be connected, is equipped with cool air inlet on the right side of the gasification furnace gasification high-temperature air preheater；
Combustion high-temperature air pipeline and high temperature clean gas hypoxemia in Boiler Furnace are equipped on the right side of higher level's air preheater
Burner is connected；
It is equipped with cool air inlet on the right side of junior's air preheater, and is connected with higher level's air preheater；
Sack cleaner, boiler induced-draft fan and chimney are connected with after the dispersed combustion electricity generation boiler.
Compared with prior art, the present invention has the advantage that
1. gasification furnace uses high temperature air and coal dust firing in the present invention, purity oxygen is not had to, more saving electric energy；
2. dedusting, desulfurizer are arranged before electricity generation boiler the present invention, electricity generation boiler tail portion is made not have to that complexity is arranged again
Dust-removing desulfurating apparatus, simplify entire station boiler system structure, save the cost；
3. coal gas of high temperature is directly sent into burner by the present invention, burns at high temperature, can effectively inhibit thermal NO x
It generates；
4. heating gas of the invention burns in low oxygen combustion device, stoichiometric ratio α can be effectively controlled, it might even be possible to
Make α=1, therefore fuel type NOx can be inhibited to generate；
5. the present invention increases boiler tail horizontal flue, enough pyrolysis and anti-are provided for reducing agent ammonium hydroxide/urea
Between seasonable, therefore SNCR mixing reduction reactor can be used, ensure that the efficiency of denitration while save the cost.
6. in summary advantage makes present system only need to be arranged a sack cleaner in boiler tail, and
Because desulfurization process, before boiler, finally discharged is dry flue gas, eliminates the process of white fume-dehydrating.
Detailed description of the invention
Fig. 1 is the efficient and inexpensive boiler flue gas treatment system of one kind of the present invention；
Appended drawing reference: the strong swirling combustion gasification furnace of 1-, 2- liquid slag slag-drip opening, 3- clinker pond, 4- high temperature air are tangential
Feed spout, 5- coal dust spout, 6- heating gas fairlead, 7- heating gas attemperator, 8- boiler feedwater mouth, 9- coal gas of high temperature enters
Mouthful, 10- limestone/lime spout, 11- fluid-bed sweetening reactor, 12- cleaning heating gas fairlead, 13- high temperature clean gas
Low oxygen combustion device, 14- dispersed combustion electricity generation boiler, 15- ammonium hydroxide/urea side spout, 16-SNCR mixing reduction reactor, 17-
Spout on ammonium hydroxide/urea, 18- high temperature superheater, the gasification of 19- gasification furnace are used
High-temperature air preheater, 20- low temperature superheater, 21- higher level's economizer, 22- higher level's air preheater, 23- junior
It saves
Coal device, 24- junior air preheater, 25- gas recirculating fan, 26- flue gas recirculation flue, 27- gasification furnace
Gasify and uses high temperature air pipeline, combustion high-temperature air pipeline in 28- Boiler Furnace, 29- sack cleaner, 30- boiler induced-draft fan,
31- chimney.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
Coal dust spout 5, the strong swirling combustion gasification furnace 1 are equipped with above the strong swirling combustion gasification furnace 1 as shown in Figure 1
Left side is equipped with high temperature air and tangentially feeds spout 4, and strong 1 lower part of swirling combustion gasification furnace is equipped with liquid slag slag-drip opening 2, institute
It states 2 lower part of liquid slag slag-drip opening and is equipped with clinker pond 3, be equipped with heating gas fairlead 6 above the strong swirling combustion gasification furnace 1；
The heating gas fairlead 6 is connected with lower section heating gas attemperator 7；Boiler feedwater mouth is equipped with below the heating gas attemperator 6
8, and be connected with fluid-bed sweetening reactor 11；11 lower left side of fluid-bed sweetening reactor is equipped with coal gas of high temperature entrance 9, institute
11 upper left side of fluid-bed sweetening reactor is stated equipped with limestone/lime spout 10,11 upper right side of fluid-bed sweetening reactor
Equipped with clean heating gas fairlead 12, lower right side is equipped with desulfurization product discharge pipe；The cleaning heating gas fairlead 12 be located at
The high temperature clean gas low oxygen combustion device 13 of 14 body lower part of dispersed combustion electricity generation boiler is connected；The dispersed combustion power generation pot
High temperature clean gas low oxygen combustion device 13 is equipped at left and right sides of furnace 14,14 upper left side of dispersed combustion electricity generation boiler is equipped with ammonia
Water/urea side spout 15 is equipped with spout 17 on ammonium hydroxide/urea, the dispersed combustion above the dispersed combustion electricity generation boiler 14
SNCR mixing reduction reactor 16 is equipped at 14 horizontal flue of electricity generation boiler, 14 tail portion of dispersed combustion electricity generation boiler is successively set
There are high temperature superheater 18, gasification furnace gasification high-temperature air preheater 19, low temperature superheater 20, higher level's economizer 21, Shang Jikong
Air preheater 22, junior's economizer 23, junior's air preheater 24；The gasification furnace gasification high-temperature air preheater 19 is equipped with
Gasification furnace gasification high temperature air pipeline 27 is connected with strong swirling combustion gasification furnace 1, and the gasification furnace gasification high temperature air is pre-
Cool air inlet is equipped on the right side of hot device 19；Combustion high-temperature air pipeline in Boiler Furnace is equipped on the right side of higher level's air preheater 22
28 are connected with high temperature clean gas low oxygen combustion device 13；Cool air inlet is equipped on the right side of junior's air preheater 24, and
It is connected with higher level's air preheater 22；14 are connected with sack cleaner 29, boiler induced-draft fan after the dispersed combustion electricity generation boiler
30 and chimney 31.
The operation principle of the present invention is that: coal dust and high temperature air are sprayed into gasification furnace 1, conflagration, coal dust decomposition gasification,
Enter clinker pond 3 through liquid slag slag-drip opening 2 after coal ash melting.Heating gas then enters attemperator 7 through fairlead 6 and cools down.Gasification
Furnace 1 comes from electricity generation boiler rear high-temperature air preheater 19 with high temperature air.Heating gas after the cooling of attemperator 7 enters fluidisation
Bed desulfurization reactor 11, while spraying into limestone/lime and carrying out desulphurization reaction.Clean heating gas after desulfurization enters low oxygen combustion
Device 13 burns, power generation.The flue gas generated that burns enters together with ammonium hydroxide/urea after spraying into the interior simultaneously pyrolytic gasification of furnace to be placed on
SNCR mixing reduction reactor 16 at horizontal flue carries out denitration process.The flue gas finally to discharge out of the furnace is through sack cleaner
29 dedustings are discharged after boiler induced-draft fan 30 introduces chimney 31.
Claims (7)
1. it is characterized by comprising on strong vortex combustion gasification furnace 1 for a kind of boiler desulfurization denitration dust removal system of high efficiency, low cost
Side is equipped with coal dust spout 5, is equipped with high temperature air on the left of the strong swirling combustion gasification furnace 1 and tangentially feeds spout 4, the strong whirlpool
1 lower part of combustion gasification furnace is equipped with liquid slag slag-drip opening 2, and 2 lower part of liquid slag slag-drip opening is equipped with clinker pond 3, described strong
Heating gas fairlead 6 is equipped with above swirling combustion gasification furnace 1；The heating gas fairlead 6 and 7 phase of lower section heating gas attemperator
Even；It is equipped with boiler feedwater mouth 8 below the heating gas attemperator 6, and is connected with fluid-bed sweetening reactor 11；The fluidized bed
11 lower left side of desulfurization reactor is equipped with coal gas of high temperature entrance 9, and 11 upper left side of fluid-bed sweetening reactor is equipped with lime stone/stone
Grey spout 10,11 upper right side of fluid-bed sweetening reactor are equipped with clean heating gas fairlead 12, and lower right side is produced equipped with desulfurization
Object discharge pipe；The cleaning heating gas fairlead 12 and the high temperature clean gas positioned at 14 body lower part of dispersed combustion electricity generation boiler
Low oxygen combustion device 13 is connected；High temperature clean gas low oxygen combustion device is equipped at left and right sides of the dispersed combustion electricity generation boiler 14
13,14 upper left side of dispersed combustion electricity generation boiler is equipped with ammonium hydroxide/urea side spout 15, on the dispersed combustion electricity generation boiler 14
Side is equipped with spout 17 on ammonium hydroxide/urea, is equipped with SNCR at 14 horizontal flue of dispersed combustion electricity generation boiler and mixes reduction reaction
Device 16,14 tail portion of dispersed combustion electricity generation boiler is successively arranged high temperature superheater 18, gasification furnace gasification is preheated with high temperature air
Device 19, low temperature superheater 20, higher level's economizer 21, higher level's air preheater 22, junior's economizer 23, junior's air preheater
24；The gasification furnace gasification high-temperature air preheater 19 is equipped with gasification furnace gasification high temperature air pipeline 27 and strong swirling combustion
Gasification furnace 1 is connected, and is equipped with cool air inlet on the right side of the gasification furnace gasification high-temperature air preheater 19；Higher level's air is pre-
Combustion high-temperature air pipeline 28 in Boiler Furnace is equipped on the right side of hot device 22 to be connected with high temperature clean gas low oxygen combustion device 13；It is described
It is equipped with cool air inlet on the right side of junior's air preheater 24, and is connected with higher level's air preheater 22；The dispersed combustion power generation
14 are connected with sack cleaner 29, boiler induced-draft fan 30 and chimney 31 after boiler.
2. high temperature air according to claim 1 tangentially feeds spout 4 it is characterized by: by rear gasification furnace gasization height
Warm air preheater 19 is sent into high temperature air by gasification furnace gasification high temperature air pipeline 25.
3. gasification furnace according to claim 2 gasification high temperature air pipeline 25, it is characterised in that: pipeline material therefor is
310s resistant to high temperature.
4. fluid-bed sweetening reactor 11 according to claim 1 is it is characterized by: lower left side is equipped with coal gas of high temperature entrance
9, heating gas is directly subjected to desulfurization process.
5. high temperature clean gas low oxygen combustion device 13 according to claim 1 is it is characterized by: the direct burning that do not cool down
The clean heating gas sent out by fluid-bed sweetening reactor 11.
6. high temperature cleaning heating gas low oxygen combustion device according to claim 1 13 is it is characterized by: electricity generation boiler tail portion
Flue gas blast high temperature cleaning heating gas low oxygen combustion device 13 through flue gas recirculation flue by gas recirculating fan 25, reduce
Oxygen concentration therein guarantees low oxygen combustion.
7. SNCR mixing reduction reactor according to claim 1 is it is characterized by: it is set to the horizontal cigarette after lengthening
At road, to guarantee that ammonium hydroxide/urea has the sufficient time to be pyrolyzed and restores NOx.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811128152.4A CN109404950A (en) | 2018-09-27 | 2018-09-27 | A kind of boiler flue gas treatment system of high efficiency, low cost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811128152.4A CN109404950A (en) | 2018-09-27 | 2018-09-27 | A kind of boiler flue gas treatment system of high efficiency, low cost |
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| CN109404950A true CN109404950A (en) | 2019-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811128152.4A Pending CN109404950A (en) | 2018-09-27 | 2018-09-27 | A kind of boiler flue gas treatment system of high efficiency, low cost |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645567A (en) * | 2019-10-29 | 2020-01-03 | 辽宁绿源能源环保科技集团有限责任公司 | Pulverized coal boiler structure and pulverized coal combustion method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645567A (en) * | 2019-10-29 | 2020-01-03 | 辽宁绿源能源环保科技集团有限责任公司 | Pulverized coal boiler structure and pulverized coal combustion method |
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Application publication date: 20190301 |