CN204111338U - A kind of urea pyrolysis air feed system for denitrating flue gas - Google Patents
A kind of urea pyrolysis air feed system for denitrating flue gas Download PDFInfo
- Publication number
- CN204111338U CN204111338U CN201420413253.7U CN201420413253U CN204111338U CN 204111338 U CN204111338 U CN 204111338U CN 201420413253 U CN201420413253 U CN 201420413253U CN 204111338 U CN204111338 U CN 204111338U
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- CN
- China
- Prior art keywords
- air
- well heater
- pipeline
- flue gas
- feed system
- 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.)
- Expired - Fee Related
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model relates to a kind of urea pyrolysis air feed system for denitrating flue gas, comprise air preheater, well heater, pyrolysis oven and air-supply pipeline, cold primary air duct connects two branch roads, one branch road connects air preheater and well heater successively, another branch road directly connects well heater by combustion air pipeline, and the cold First air that heat primary air and combustion air pipeline through air preheater preheating export passes into pyrolysis oven after well heater heats further.Owing to there is not a large amount of flying dust in the utility model, problems such as significantly reducing coking, block flame scanner, pipe wear is serious, simplifies system, reduce cost of investment and equipment operation maintenance expense; Igniting is simple, is easy to realize, and reliability is high, ensure that the operational percentage of denitration facility.
Description
Technical field
The utility model belongs to coal steam-electric plant smoke denitration urea pyrolysis technique for production of ammonia field, is specifically related to a kind of air feed system of denitrating flue gas urea pyrolysis.
Background technology
At present, domestic denitrating flue gas urea pyrolysis dilution wind regime mainly adopts the mode of dilution air and heat primary air.There are the following problems: 1) use dilution air to increase a set of equipment newly, make system more complicated, increase cost of investment, maintenance cost is high; 2) heat primary air fly ash content is high, carries the easily high-temp combustion coking in gas heating furnace of a large amount of ashes, blocking burner, and the detection of furnace flame detector causes denitration to be tripped less than flame; 3) heat primary air ash content is greatly to peripheral conduits serious wear, easily occurs pipeline cut, and apparatus measures instrument blocks, and test is inaccurate and damage.
Summary of the invention
For the defect of prior art, the purpose of this utility model is to provide a kind of urea pyrolysis air feed system for denitrating flue gas, and this system is simpler, reduces fly ash content.
The urea pyrolysis air feed system for denitrating flue gas that the utility model provides, comprise air preheater, well heater, pyrolysis oven and air-supply pipeline, cold primary air duct connects two branch roads, one branch road connects air preheater and well heater successively, another branch road directly connects well heater by combustion air pipeline, and the cold First air that heat primary air and combustion air pipeline through air preheater preheating export passes into pyrolysis oven after well heater heats further.Described well heater is preferably gas heating furnace.
The utility model has following beneficial effect:
1) simplify system, reduce cost of investment and equipment operation maintenance expense;
2) igniting is simple, is easy to realize, and reliability is high, ensure that the operational percentage of denitration facility;
3) owing to there is not a large amount of flying dust, problems such as significantly reducing coking, block flame scanner, pipe wear is serious.
Accompanying drawing explanation
Accompanying drawing 1 is air feed system schematic diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model is used for the urea pyrolysis air feed system of denitrating flue gas, this system comprises air preheater, well heater, pyrolysis oven and air-supply pipeline, cold primary air duct connects two branch roads, one branch road connects air preheater and well heater successively, another branch road directly connects well heater by combustion air pipeline, and the cold First air that heat primary air and combustion air pipeline through air preheater preheating export passes into pyrolysis oven after well heater heats further.
The utility model adopts the air feed system of " heat primary air+cold First air " to carry out pyrolysis to urea, and the dilution wind source adopting the heat primary air of boiler to react as urea pyrolysis, does not arrange dilution air separately.The heat primary air of boiler is generally > 300 DEG C, then can reach > 500 DEG C by well heater (such as gas heating furnace) heating, significantly can reduce the energy consumption of urea pyrolysis system.Meanwhile, stable in order to ensure that gas heating furnace burns, adopt the cold First air of boiler as combustion air, sufficient oxygen combustion is provided.
Claims (2)
1. the urea pyrolysis air feed system for denitrating flue gas, it is characterized in that this system comprises air preheater, well heater, pyrolysis oven and air-supply pipeline, cold primary air duct connects two branch roads, one branch road connects air preheater and well heater successively, another branch road directly connects well heater by combustion air pipeline, and the cold First air that heat primary air and combustion air pipeline through air preheater preheating export passes into pyrolysis oven after well heater heats further.
2. the urea pyrolysis air feed system for denitrating flue gas according to claim 1, is characterized in that described well heater is gas heating furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420413253.7U CN204111338U (en) | 2014-07-25 | 2014-07-25 | A kind of urea pyrolysis air feed system for denitrating flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420413253.7U CN204111338U (en) | 2014-07-25 | 2014-07-25 | A kind of urea pyrolysis air feed system for denitrating flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204111338U true CN204111338U (en) | 2015-01-21 |
Family
ID=52328674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420413253.7U Expired - Fee Related CN204111338U (en) | 2014-07-25 | 2014-07-25 | A kind of urea pyrolysis air feed system for denitrating flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204111338U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106855235A (en) * | 2017-02-20 | 2017-06-16 | 长沙超梵环境科技有限公司 | A kind of house refuse multicell pyrolysis gasifying device and method |
| CN108525516A (en) * | 2018-06-26 | 2018-09-14 | 大唐环境产业集团股份有限公司 | A kind of denitration for hydrolysis of urea dilutes wind system |
-
2014
- 2014-07-25 CN CN201420413253.7U patent/CN204111338U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106855235A (en) * | 2017-02-20 | 2017-06-16 | 长沙超梵环境科技有限公司 | A kind of house refuse multicell pyrolysis gasifying device and method |
| CN108525516A (en) * | 2018-06-26 | 2018-09-14 | 大唐环境产业集团股份有限公司 | A kind of denitration for hydrolysis of urea dilutes wind system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20170725 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |