CN201783302U - Denitration system arranged downstream following desulfuration - Google Patents
Denitration system arranged downstream following desulfuration Download PDFInfo
- Publication number
- CN201783302U CN201783302U CN2010202955546U CN201020295554U CN201783302U CN 201783302 U CN201783302 U CN 201783302U CN 2010202955546 U CN2010202955546 U CN 2010202955546U CN 201020295554 U CN201020295554 U CN 201020295554U CN 201783302 U CN201783302 U CN 201783302U
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- heat exchanger
- exchanger tube
- desulfurizer
- flue gas
- desulfurization
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a denitration system arranged downstream following desulfuration, which includes a desulfurizer for the fume desulfuration; and a fume outlet of the desulfurizer is connected with a denitration device for fume catalysis and denitration. The denitration system has a reasonable structure and achieves good denitration effect.
Description
Technical field:
The utility model relates to a kind of denitrating system.
Background technology:
China is with coal, oily for the big country of main energy consumption, and in power fuel, sulfur content belongs to height, middle-grade coal, oil occupies suitable ratio.In burning, not only produced a large amount of oxysulfides, also has more nitrogen oxide, this brings enormous economic loss to national economy, also heavy damage human environment of depending on for existence, first nitrogen oxide heavy damage atmospheric ozone layer, it two is that nitrogen nitride and people's red blood cell affinity surpasses 1000 times of carbon monoxide, and it three is growths that acid rain harms the crops.
Divide according to the fume emission flow process, handle and vent gas treatment in denitrating flue gas also can be divided into.The catalyst that nitrogen oxide in the vent gas treatment power plant boiler combustion product gases is used has two kinds of non-selective catalytic reduction catalysts (NSCR) and selective catalytic reduction catalysts (SCR).90% denitration all is that reason is its denitration rate height with selective catalytic reduction catalysts (SCR).But at present in order to satisfy the requirement of its reaction temperature, generally place desulfurizing tower before, its installation, make particularly inconvenience, also improved mounting cost and cost greatly.
Summary of the invention:
It is a kind of rational in infrastructure that the purpose of this utility model is to provide, the denitrating system of the desulfurization postposition that denitration effect is good.
Technical solution of the present utility model is:
A kind of denitrating system of desulfurization postposition is characterized in that: comprise flue gas is carried out the desulfurizer that desulfurization is handled that the exhanst gas outlet of desulfurizer is communicated with the denitrification apparatus that flue gas is carried out the catalytic denitration processing.
Carry out at the exhanst gas outlet of desulfurizer and to flue gas between the denitrification apparatus that catalytic denitration handles the air channel dehumidifier being set.
Denitrification apparatus comprises housing, heat exchanger tube is set in the housing, fin is set on the heat exchanger tube, at heat exchanger tube and fin outer surface catalyst coat is set, the tube side import of heat exchanger tube communicates with smoke inlet pipe, the tube side outlet of heat exchanger tube is communicated with the gas approach of desulfurizer, and the outer shell side import of heat exchanger tube is communicated with the exhanst gas outlet of desulfurizer, and the outer shell side outlet of heat exchanger tube is communicated with the purified gas floss hole.The urea decomposer that produces the ammonia that mixes with flue gas is set before the denitrification apparatus that flue gas is carried out the catalytic denitration processing.
The utility model is rational in infrastructure, through the flue gas of wet desulphurization by efficient flue dehydrating unit, removed the SO in the flue gas
X, flying dust and water, the flue gas that contains NOx enters the SCR reactor, has promoted NH under the high temperature catalyst effect
3With the NOx reaction, generate water and nitrogen, and then avoided SO
X, NOx is to the pollution of atmosphere, improved reliability, the stability of treatment effect and system.
The beneficial effects of the utility model also are:
1. prevented the abrasion of catalyst.Abrasion is owing to flying dust collision catalyst surface causes.After the catalyst postposition, because the wet desulphurization of front end is removed the service life of having improved catalyst greatly with flying dust wherein.
2. install easy to makely, reduced engineering cost greatly.
3. the generation of ammonium hydrogen sulfate has been avoided in first desulfurization on the technology, has guaranteed the reliability of equipment.
4. system has guaranteed the temperature of catalyst, thereby has guaranteed activity of such catalysts, has improved the denitration rate.
Description of drawings:
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the configuration diagram of an embodiment of the utility model.
Fig. 2 is the configuration diagram of denitrification apparatus.
The specific embodiment:
A kind of denitrating system of desulfurization postposition comprises flue gas is carried out the desulfurizer 1 that desulfurization is handled, and the exhanst gas outlet of desulfurizer is communicated with the denitrification apparatus 2 that flue gas is carried out the catalytic denitration processing.
Carry out at the exhanst gas outlet of desulfurizer and to flue gas between the denitrification apparatus that catalytic denitration handles air channel dehumidifier 3 being set.
Denitrification apparatus comprises housing 4, heat exchanger tube 5 is set in the housing, fin is set on the heat exchanger tube, at heat exchanger tube and fin outer surface catalyst coat is set, the tube side import of heat exchanger tube communicates with smoke inlet pipe, the tube side outlet of heat exchanger tube is communicated with the gas approach of desulfurizer, and the outer shell side import of heat exchanger tube is communicated with the exhanst gas outlet of desulfurizer, and the outer shell side outlet of heat exchanger tube is communicated with the purified gas floss hole.The urea decomposer 6 that produces the ammonia that mixes with flue gas is set before the denitrification apparatus that flue gas is carried out the catalytic denitration processing.
The course of work of the present utility model is: the waste gas of discharging from boiler enters the out of stock system of desulfurization through transfer valve 7, elder generation is through the tube side of denitrification apparatus 2, heat to catalyst, enter 1 desulfurization of desulfurizing tower device then, to air channel dehumidifier 3 dehydration, flue gas is through mixing with the ammonia that gushes out of urea decomposer 6 in the pipeline behind the desulfurization dewatering from desulfurizer top for the flue gas entrapped moisture, and mixes in mixed flow device 8 after the shell side of denitrification apparatus 2, under the effect of catalyst, NOx and NH
3Reduction reaction takes place, thereby removes the nitrogen oxide in the flue gas.
Claims (4)
1. the denitrating system of a desulfurization postposition is characterized in that: comprise flue gas is carried out the desulfurizer that desulfurization is handled that the exhanst gas outlet of desulfurizer is communicated with the denitrification apparatus that flue gas is carried out the catalytic denitration processing.
2. the denitrating system of desulfurization postposition according to claim 1 is characterized in that: carry out at the exhanst gas outlet of desulfurizer and to flue gas between the denitrification apparatus that catalytic denitration handles the air channel dehumidifier being set.
3. the denitrating system of desulfurization postposition according to claim 1 and 2, it is characterized in that: denitrification apparatus comprises housing, heat exchanger tube is set in the housing, fin is set on the heat exchanger tube, at heat exchanger tube and fin outer surface catalyst coat is set, the tube side import of heat exchanger tube communicates with smoke inlet pipe, and the tube side outlet of heat exchanger tube is communicated with the gas approach of desulfurizer, the outer shell side import of heat exchanger tube is communicated with the exhanst gas outlet of desulfurizer, and the outer shell side outlet of heat exchanger tube is communicated with the purified gas floss hole.
4. the denitrating system of desulfurization postposition according to claim 1 and 2 is characterized in that: the urea decomposer that produces the ammonia that mixes with flue gas is set before the denitrification apparatus that flue gas is carried out the catalytic denitration processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202955546U CN201783302U (en) | 2010-08-17 | 2010-08-17 | Denitration system arranged downstream following desulfuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202955546U CN201783302U (en) | 2010-08-17 | 2010-08-17 | Denitration system arranged downstream following desulfuration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201783302U true CN201783302U (en) | 2011-04-06 |
Family
ID=43815284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202955546U Expired - Fee Related CN201783302U (en) | 2010-08-17 | 2010-08-17 | Denitration system arranged downstream following desulfuration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201783302U (en) |
-
2010
- 2010-08-17 CN CN2010202955546U patent/CN201783302U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: NANTONG YATAI SHIP ENGINEERING CO., LTD. Assignor: Wang Derong Contract record no.: 2011320000608 Denomination of utility model: Denitration system arranged downstream following desulfuration Granted publication date: 20110406 License type: Exclusive License Record date: 20110419 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20180817 |