CN101284203A - Method and apparatus for removing SO3 from flue gas - Google Patents
Method and apparatus for removing SO3 from flue gas Download PDFInfo
- Publication number
- CN101284203A CN101284203A CNA2008100613128A CN200810061312A CN101284203A CN 101284203 A CN101284203 A CN 101284203A CN A2008100613128 A CNA2008100613128 A CN A2008100613128A CN 200810061312 A CN200810061312 A CN 200810061312A CN 101284203 A CN101284203 A CN 101284203A
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- ammonia
- flue gas
- flue
- nozzle
- blender
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Abstract
The invention discloses a method for removing SO3 from smoke gas which comprises the steps such as ammonia passing and dilution, ammonia injection and emission, residual ammonia detection, ammonia content adjustment, etc. The invention also discloses a device for removing the SO3 from the smoke gas, which comprises a mixer, an ammonia injection and emission system, a flue, smoke gas system equipment, and a control center. The mixer is provided with an ammonia gas inlet, an air inlet and an outlet; an air boiler is arranged at the air inlet, and the outlet is connected to an input end of the ammonia injection and emission system; an output end of the ammonia injection and emission system is inserted in the flue; a residual ammonia surveymeter is arranged on the rear end of the flue after the rear end of the flue passes through the smoke gas system equipment; the residual ammonia surveymeter is connected to the control center which is connected to the front end of the ammonia gas inlet. In the method, ammonia gas reacts with the SO3 in the smoke gas to remove the SO3, the residual ammonia detection is performed before the smoke gas is discharged, and the quantity of ammonia supply is adjusted according to the leak amount of the ammonia in the smoke gas, so as to keep the ammonia emission within bounds. The method can effectively remove the SO3, avoiding eroding the smoke gas system equipment, and lowers the cost.
Description
[technical field]
The present invention relates to a kind of environment-protective process and device, relate in particular to a kind of SO that from flue gas, removes
3Method and device.
[technical background]
Be to contain SO in the large quantity of exhaust gas of the boiler of fuel or power plant emission with coal or oil
3Material is for preventing SO
3Directly discharging causes environmental pollution, flue gas all to need to remove the strong harmful SO of corrosivity before discharging
3Material.
At present, SO in the flue gas is avoided in removal
3The process of corrosion mainly contains the raising flue-gas temperature, shifts to an earlier date more exchange device or employing corrosion resisting alloy equipment etc.
Improve SO in the flue-gas temperature method
3In flue gas, easily form SO
3Acid mist is because of SO
3Content relevant with the acid dew-point temperature of flue gas, SO
3The high more acid dew-point temperature of content is just high more, and two discharged flue gas need remain on more than the dew-point temperature, keeps higher flue-gas temperature so just need a large amount of energy to improve, and the structure and material of equipment is had specific (special) requirements, and technology cost height is economical inadequately.More exchange device or employing corrosion resisting alloy equipment all need to increase a large amount of equipment cost inputs in advance.
[summary of the invention]
Purpose of the present invention is exactly in order to solve problems of the prior art, proposes a kind of SO that removes from flue gas
3Method and device, can effectively remove SO
3, and prevent SO
3Corrosion flue gas system equipment reduces engineering cost and maintenance cost.
For achieving the above object, patent of the present invention has proposed a kind of SO that removes from flue gas
3Method, in turn include the following steps:
Logical ammonia dilution: air boosts by air blast, flows into blender through the air heater heating, and the ammonia of liquefied ammonia evaporation is through being metered into blender, ammonia and hot-air mixed diluting in blender, and be controlled in the explosion limit of ammonia;
Notes ammonia sprays: mix and dilute uniform ammonia and evenly inject flue by annotating the ammonia spraying system, mix the SO in ammonia and the flue gas with flue gas
3SO is removed in reaction
3, remove SO
3After flue gas enter flue gas system equipment;
Surplus ammonia detects: remove SO
3After flue gas by getting rid of in the flue gas system equipment, before fume emission, adopt surplus ammonia detector to measure the amount of leakage of ammonia in the discharging flue gas, and with measurement feedback to control centre;
Adjust the ammonia amount: control centre adjusts for the ammonia amount automatically according to the deviation of measured value and setting.
As preferably, the blender that adopts in the described logical ammonia dilution is following current mixed structure in the same way, and is provided with turbulent baffle plate.
As preferably, to annotate the ammonia spraying system during described notes ammonia sprays and form by the blast tube of annotating ammonia distribution header and a plurality of installations arranged side by side, blast tube is installed in the flue.
As preferably, described blast tube comprises the person in charge, nozzle adapter, nozzle and cleaning pipe, and described cleaning pipe is fixed on the person in charge, and the person in charge's side is taken over by nozzle and is connected with nozzle.
For achieving the above object, patent of the present invention has also proposed a kind of SO that removes from flue gas
3Device, comprise blender, annotate ammonia spraying system, flue, flue gas system equipment, control centre, have ammonia inlet, air intake and outlet on the described blender, the air intake place is equipped with air heater, outlet is connected to the input of annotating the ammonia spraying system, and the output of annotating the ammonia spraying system inserts in the flue, behind the process flue gas system equipment of the rear end of flue the ammonia detector of having a surplus is installed, surplus ammonia detector is connected to control centre, and control centre is connected to the front end of ammonia inlet.
As preferably, described notes ammonia spraying system comprises the blast tube of annotating ammonia distribution header and a plurality of installations arranged side by side, and blast tube is installed in the flue.
As preferably, described blast tube comprises the person in charge, nozzle adapter, nozzle and cleaning pipe, and described cleaning pipe is fixed on the person in charge, and the person in charge's side is taken over by nozzle and is connected with nozzle.
As preferably, described blender comprises tube-like envelope, reducing pipe, shower nozzle, turbulent baffle plate, and the front end of tube-like envelope is an air intake, and the side has the ammonia inlet, and the rear end is a reducing pipe, and the inside of tube-like envelope is provided with turbulent baffle plate.
The beneficial effect of patent of the present invention: the present invention adopts the SO in ammonia and the flue gas
3SO is removed in reaction
3, and before fume emission, carry out surplus ammonia and detect, the amount of leakage adjustment confession ammonia amount according to ammonia in the flue gas makes ammonia emission control within the specific limits.By control centre's control, the mixing ammonia level is controlled at below the explosion limit.Adopt the present invention can effectively remove SO
3, and prevent SO
3Corrosion flue gas system equipment has reduced engineering cost and maintenance cost.
[description of drawings]
Fig. 1 is a kind of SO that removes from flue gas among the present invention
3The FB(flow block) of method;
Fig. 2 is a kind of SO that removes from flue gas among the present invention
3The structural representation of device;
Fig. 3 is a kind of SO that removes from flue gas among the present invention
3Device in the structural representation of blast tube;
Fig. 4 is the A-A cutaway view of Fig. 3;
Fig. 5 is a kind of SO that removes from flue gas among the present invention
3Device in the structural representation of blender;
Fig. 6 is the left view of Fig. 5.
[specific embodiment]
Consult Fig. 1, a kind of SO that from flue gas, removes
3Method, in turn include the following steps:
Logical ammonia dilution 11: air boosts by air blast, flows into blender through the air heater heating, and the ammonia of liquefied ammonia evaporation is through being metered into blender, ammonia and hot-air mixed diluting in blender, and be controlled in the explosion limit of ammonia; The blender that adopts is following current mixed structure in the same way, and is provided with turbulent baffle plate.
Annotate ammonia and spray 12: mix and dilute uniform ammonia and evenly inject flue, mix the SO in ammonia and the flue gas with flue gas by annotating the ammonia spraying system
3SO is removed in reaction
3, remove SO
3After flue gas enter flue gas system equipment; Annotate the ammonia spraying system and be made up of a plurality of blast tubes of annotating ammonia distribution header and a plurality of installations arranged side by side, the arrangement of a plurality of blast tubes is vertical with the flue gas direction, and a row or multi-row nozzle is installed on the nozzle blast tube, arranges nozzle more and manages the interlaced α angle of opening mutually.Be installed in the flue.Blast tube comprises is responsible for 3-1, nozzle adapter 3-2, nozzle 3-3 and cleaning pipe 3-4, and described cleaning pipe 3-4 is fixed on and is responsible on the 3-1, and the side of being responsible for 3-1 is connected with nozzle 3-3 by nozzle adapter 3-2.
Surplus ammonia detects 13: remove SO
3After flue gas by getting rid of in the flue gas system equipment, before fume emission, adopt surplus ammonia detector to measure the amount of leakage of ammonia in the discharging flue gas, and with measurement feedback to control centre;
Adjust ammonia amount 14: control centre adjusts for the ammonia amount automatically according to the deviation of measured value and setting.
Consult Fig. 2, a kind of SO that from flue gas, removes
3Device, comprise blender 2, annotate ammonia spraying system, flue 5, flue gas system equipment 6, control centre 8, have ammonia inlet G, air intake F and outlet H on the described blender 2, air intake F place is equipped with air heater 1, outlet H is connected to the input of annotating the ammonia spraying system, the output of annotating the ammonia spraying system inserts in the flue 5, the ammonia detector 7 of having a surplus is installed through flue gas system equipment 6 backs in the rear end of flue 5, surplus ammonia detector 7 is connected to control centre 8, and control centre 8 is connected to the front end of ammonia inlet.Described notes ammonia spraying system comprises a plurality of blast tubes 4 of annotating ammonia distribution header 3 and a plurality of installations arranged side by side, and the arrangement of a plurality of blast tubes is vertical with the flue gas direction, and a row or multi-row nozzle 3-3 of installation on the blast tube 4 arranges the nozzle α angle of staggering mutually more.Blast tube 4 interlaced ground are installed in the flue 5 side by side.
Consult Fig. 3,4, described blast tube 4 comprises is responsible for 3-1, nozzle adapter 3-2, nozzle 3-3 and cleaning pipe 3-4, and described cleaning pipe 3-4 is fixed on and is responsible on the 3-1, and the side of being responsible for 3-1 is connected with nozzle 3-3 by nozzle adapter 3-2.Blast tube 4 is installed in the flue 5, with suitable spacing blast tube 4 is installed.Enter each blast tube 4 by blender 2 diluted ammonias through annotating ammonia distribution header 3, the nozzle 3-3 on depending nozzle pipe 4 and the blast tube injects flue 5 equably with ammonia.Injection direction is parallel along the flow of flue gas direction, also reversible flow of flue gas direction, and nozzle 3-3 is interlaced, and whole cross section is evenly arranged.Blast tube 4 is provided with ammonia import B, annotates ammonia outlet D, clear mouthpiece E, and the flue gas flow path direction is that C direction or C arrange to opposite direction.Nozzle is taken over 3-2, nozzle 3-3 and is protruded in person in charge 3-1 outside.Nozzle 3-3 intersects well-balanced distribution, the certain angle of being separated by between two row's nozzle 3-3, and angle determines that according to technological requirement the ammonia that major control enters in the flue 5 is evenly distributed.Also can single row or multiple rows arrange.α is the error angle between the wrong 3-3 of nozzle among the figure.
Consult Fig. 5,6, described blender 2 comprises tube-like envelope 4-1, reducing pipe 4-2, shower nozzle 4-5, turbulent baffle plate 4-6, and the front end of tube-like envelope 4-1 is air intake F, and the side has ammonia inlet G, the rear end is reducing pipe 4-2, and the inside of tube-like envelope 4-1 is provided with turbulent baffle plate 4-6.The structure of blender 2 is following current mixing in the same way, and is added with turbulent baffle plate 4-6, and ammonia and air are mixed, and is sent to and annotates the ammonia spraying system, injects ammonia by annotating the ammonia spraying system in flue gas.The ammonia that the air that enters from air intake F and ammonia inlet G enter enters the rear portion of blender 2 again after tentatively mix the front portion of blender 2, the turbulent region that turbulent baffle plate 4-6 is housed further mixes air and ammonia.
Air boosts by air blast, flow into blender 2 through air heater 1 heating, the ammonia of liquefied ammonia evaporation enters blender 2 through measure control, hot-air and ammonia evenly mix in blender 2, and the control ammonia is below explosion limit, be sent to again and annotate the ammonia spraying system, annotating the ammonia spraying system is made up of for 4 groups the blast tube of annotating ammonia distribution header 3 and install side by side, according to arts demand plurality of nozzles 3-3 is installed on the blast tube 4, blast tube 4 is installed in the flue 5, with suitable spacing blast tube 54 is installed, enter each blast tube 4 by blender 2 diluted ammonias through annotating ammonia distribution header 3, depending nozzle pipe 4 injects flue 5 equably with ammonia, and the ammonia that injects flue 5 mixes the SO in ammonia and the flue gas with flue gas
3SO is removed in reaction
3, remove SO
3After flue gas can enter flue gas system equipment 6.At the pre-installed ammonia detector 7 of having a surplus of fume emission, be used for measuring the amount of leakage of ammonia in the discharging flue gas.Measurement feedback is adjusted for the ammonia amount by control centre 8 to control centre 8.Whole system is by control centre's 8 centralized Control.
The foregoing description is to explanation of the present invention, is not limitation of the invention, any scheme after the simple transformation of the present invention is all belonged to protection scope of the present invention.
Claims (8)
1. from flue gas, remove SO for one kind
3Method, it is characterized in that: in turn include the following steps:
Logical ammonia dilution (11): air boosts by air blast, flows into blender through the air heater heating, and the ammonia of liquefied ammonia evaporation is through being metered into blender, ammonia and hot-air mixed diluting in blender, and be controlled in the explosion limit of ammonia;
Annotate ammonia and spray (12): mix and dilute uniform ammonia and evenly inject flue, mix the SO in ammonia and the flue gas with flue gas by annotating the ammonia spraying system
3SO is removed in reaction
3, remove SO
3After flue gas enter flue gas system equipment;
Surplus ammonia detects (13): remove SO
3After flue gas by getting rid of in the flue gas system equipment, before fume emission, adopt surplus ammonia detector to measure the amount of leakage of ammonia in the discharging flue gas, and with measurement feedback to control centre;
Adjust ammonia amount (14): control centre adjusts for the ammonia amount automatically according to the deviation of measured value and setting.
2. a kind of SO that from flue gas, removes as claimed in claim 1
3Method, it is characterized in that: the blender that adopts in the described logical ammonia dilution (11) is following current mixed structure in the same way, and is provided with turbulent baffle plate.
3. a kind of SO that from flue gas, removes as claimed in claim 1 or 2
3Method, it is characterized in that: described notes ammonia sprays to be annotated ammonia spraying system and is made up of the blast tube of annotating ammonia distribution header and a plurality of installations arranged side by side in (12), blast tube is installed in the flue.
4. a kind of SO that from flue gas, removes as claimed in claim 3
3Method, it is characterized in that: described blast tube comprises the person in charge (3-1), nozzle adapter (3-2), nozzle (3-3) and cleaning pipe (3-4), described cleaning pipe (3-4) is fixed on the person in charge (3-1), and the side of being responsible for (3-1) is connected with nozzle (3-3) by nozzle adapter (3-2).
5. from flue gas, remove SO for one kind
3Device, it is characterized in that: comprise blender (2), annotate the ammonia spraying system, flue (5), flue gas system equipment (6), control centre (8), has ammonia inlet (G) on the described blender (2), air intake (F) and outlet (H), air intake (F) locates to be equipped with air heater (1), outlet (H) is connected to the input of annotating the ammonia spraying system, the output of annotating the ammonia spraying system inserts in the flue (5), the ammonia detector (7) of having a surplus is installed through flue gas system equipment (6) back in the rear end of flue (5), surplus ammonia detector (7) is connected to control centre (8), and control centre (8) is connected to the front end of ammonia inlet.
6. a kind of SO that from flue gas, removes as claimed in claim 5
3Device, it is characterized in that: described notes ammonia spraying system comprises the blast tube (4) of annotating ammonia distribution header (3) and a plurality of installations arranged side by side, and blast tube (4) is installed in the flue (5).
7. a kind of SO that from flue gas, removes as claimed in claim 6
3Device, it is characterized in that: described blast tube (4) comprises the person in charge (3-1), nozzle adapter (3-2), nozzle (3-3) and cleaning pipe (3-4), described cleaning pipe (3-4) is fixed on the person in charge (3-1), and the side of being responsible for (3-1) is connected with nozzle (3-3) by nozzle adapter (3-2).
8. as claim 5 or 6 or 7 described a kind of SO that from flue gas, remove
3Device, it is characterized in that: described blender (2) comprises tube-like envelope (4-1), reducing pipe (4-2), shower nozzle (4-5), turbulent baffle plate (4-6), the front end of tube-like envelope (4-1) is air intake (F), the side has ammonia inlet (G), the rear end is reducing pipe (4-2), and the inside of tube-like envelope (4-1) is provided with turbulent baffle plate (4-6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100613128A CN101284203A (en) | 2008-04-18 | 2008-04-18 | Method and apparatus for removing SO3 from flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100613128A CN101284203A (en) | 2008-04-18 | 2008-04-18 | Method and apparatus for removing SO3 from flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101284203A true CN101284203A (en) | 2008-10-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100613128A Pending CN101284203A (en) | 2008-04-18 | 2008-04-18 | Method and apparatus for removing SO3 from flue gas |
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| Country | Link |
|---|---|
| CN (1) | CN101284203A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102068897A (en) * | 2011-01-11 | 2011-05-25 | 中环（中国）工程有限公司 | Ammonia supply device for ammonia method desulfuration process |
| CN105854537A (en) * | 2016-05-09 | 2016-08-17 | 清华大学 | Industrial furnace sulfur trioxide pre-removing and denitration device and method |
| CN108211711A (en) * | 2017-12-06 | 2018-06-29 | 中国恩菲工程技术有限公司 | Remove smoke the method for middle sulfur trioxide |
| CN113262626A (en) * | 2021-05-17 | 2021-08-17 | 西安交通大学 | System and method for adopting high-temperature ammonia-air mixed gas to atomize alkaline slurry and cooperatively desulfurizing and denitrifying |
-
2008
- 2008-04-18 CN CNA2008100613128A patent/CN101284203A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102068897A (en) * | 2011-01-11 | 2011-05-25 | 中环（中国）工程有限公司 | Ammonia supply device for ammonia method desulfuration process |
| CN105854537A (en) * | 2016-05-09 | 2016-08-17 | 清华大学 | Industrial furnace sulfur trioxide pre-removing and denitration device and method |
| CN105854537B (en) * | 2016-05-09 | 2019-05-07 | 清华大学 | A kind of industrial furnace removes sulfur trioxide and denitrification apparatus and method in advance |
| CN108211711A (en) * | 2017-12-06 | 2018-06-29 | 中国恩菲工程技术有限公司 | Remove smoke the method for middle sulfur trioxide |
| CN108211711B (en) * | 2017-12-06 | 2022-08-19 | 中国恩菲工程技术有限公司 | Method for eliminating sulfur trioxide in flue gas |
| CN113262626A (en) * | 2021-05-17 | 2021-08-17 | 西安交通大学 | System and method for adopting high-temperature ammonia-air mixed gas to atomize alkaline slurry and cooperatively desulfurizing and denitrifying |
| CN113262626B (en) * | 2021-05-17 | 2022-06-07 | 西安交通大学 | System and method for adopting high-temperature ammonia-air mixed gas to atomize alkaline slurry and cooperatively desulfurizing and denitrifying |
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Open date: 20081015 |