CN206911092U - A kind of high-efficiency desulfurization denitrating system using ozone oxidation - Google Patents
A kind of high-efficiency desulfurization denitrating system using ozone oxidation Download PDFInfo
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- CN206911092U CN206911092U CN201720480807.9U CN201720480807U CN206911092U CN 206911092 U CN206911092 U CN 206911092U CN 201720480807 U CN201720480807 U CN 201720480807U CN 206911092 U CN206911092 U CN 206911092U
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- ozone oxidation
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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
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Abstract
The utility model discloses a kind of high-efficiency desulfurization denitrating system using ozone oxidation, including absorbing reaction tower, ozone generator, deduster, gas gas blender, ammonia water tank, aqua ammonia pump, slurry pool circulating pump, ammonium sulfate excavationg pump and recovery storage tank.The above-mentioned high-efficiency desulfurization denitrating system using ozone oxidation does not need the toxic gases such as liquefied ammonia；Operating cost is low；Without the escaping of ammonia and ammonia pollution；Ozone denitration mitigates operations staff's labor intensity without cumbersome control unit and detection unit；Reaction time is short, and speed is fast；Absorb complete, purification efficiency height；Do not produce secondary pollution；Because the product of ozone and NOx reactions is O2, do not influence to discharge in flue.But also SO can be improved2Transformation efficiency；Directly it can be washed using desulfurization washing tower, because NOx content is with respect to SO2For very little, the load of desulfurization washing tower need not be increased substantially.
Description
Technical field
A kind of high-efficiency desulfurization denitrating system using ozone oxidation is the utility model is related to, belongs to exhaust-gas treatment field.
Background technology
Traditional flue gas desulfurization and denitration technique can not meet strict emission reduction requirement, and there is also equipment for traditional technique
The shortcomings of investment is high, floor space is big, therefore development technology is simple, reliable desulfurizing and denitrifying process is significant.Ozone
As a kind of strong oxidizer, there is the strong oxidizing property for being only second to fluorine, NO readily can be oxidized to water-soluble generation HNO2With
HNO3NO2、N2O3、N2O5Etc. high-valence state nitrogen oxides.Then NH is used3Absorbed, most NOx conversion is N at last2Reach de-
The purpose removed, NOx clearance is up to more than 90%, while SOx is removed.Wherein mainly include following reaction：
NO+O3→NO2+O2
NO2+O3→NO3+O2
NO3+NO2→N2O4
N2O4+O3→N2O5
NO3+NO2→N2O5
3NO2+H2O→HNO3+NO
N2O5+H2O→2HNO3
After the completion of gas phase reaction, remaining ammonia is soluble in water, utilizes circulating pump for ammonia absorption sulfur dioxide, sulfur trioxide
Sprayed into through atomizer in flue gas, absorb SO in flue gas2And SO3And ammonium salt is formed, specific reaction is as follows:
SO2+H2O-→H2SO3
H2SO3+NH3 -→(NH4)2SO3
(NH4)2SO3+NOx-→(NH4)2SO4+N2
SO2+H2O+2NH3+1/2O2 -→(NH4)2SO4
2(NH4)2SO3+SO3+H2O-→(NH4)2SO4+2NH4HSO3
4NH3+2NO2+O2→6H2O+3N2
NH4HSO3+NH4OH→(NH4)2SO3+H2O
Desulphurization and denitration agent can in the circulatory system repeated regeneration:
(NH4)2SO3+SO2+H2O-→2NH4HSO3
2NO+4NH4HSO3→N2+2(NH4)2SO4+2H2SO3
H2SO3+NH3 -→(NH4)2SO3
(NH4)2SO3+SO2+H2O-→NH4HSO3
2NO+4NH4HSO3→N2+2(NH4)2SO4+2H2SO3
Existing denitrification apparatus has that efficiency is low, cost is high, security is poor, secondary pollution problems be present.
Utility model content
The utility model provides a kind of high-efficiency desulfurization denitrating system using ozone oxidation, solves and exists in the prior art
Efficiency it is low, cost is high, security is poor, secondary pollution problems be present.
In order to solve the above technical problems, technical scheme is as follows used by the utility model：
A kind of high-efficiency desulfurization denitrating system using ozone oxidation, including absorbing reaction tower, ozone generator, deduster,
Gas gas blender, ammonia water tank, aqua ammonia pump, slurry pool circulating pump, ammonium sulfate excavationg pump and recovery storage tank；The bottom of absorbing reaction tower
Be provided with net cigarettes outlet provided with gas approach, top, between the gas approach and net cigarettes outlet in absorbing reaction tower from top to bottom according to
Secondary arrangement is by washing demister, circulated sprinkling device, ammonia spray device and airflow uniform distribution device, gas approach in absorbing reaction tower
Lower section is provided with slurry pool；The inlet communication of the outlet of ozone generator and the outlet of deduster with gas gas blender, gas gas mix
The outlet of clutch connects with the gas approach of absorbing reaction tower；The water inlet of aqua ammonia pump connects with ammonia water tank, the water outlet of aqua ammonia pump
Mouth connects with ammonia spray device；The water inlet of slurry pool circulating pump connects with the middle and upper part of slurry pool, and slurry pool circulating pump goes out
The mouth of a river connects with circulated sprinkling device；The water inlet of ammonium sulfate excavationg pump connects with the bottom of slurry pool, and ammonium sulfate excavationg pump goes out
The mouth of a river connects with recovery storage tank.
It is denitration desulfurization reaction zone between gas approach and net cigarettes outlet in above-mentioned absorbing reaction tower；Said flow arranges
Put and improve gas-liquid contact surface area, extend flue gas and sprayed slurry time of contact, so as to improve absorption efficiency.
The nouns of locality such as the application is upper and lower, top, bottom, refer both to relative position during system normal use.
Said system is that the low-temp desulfurization denitrating system of high efficient technology is combined with Ozone oxidation method and wet absorption.
In order to further improve denitrification efficiency, ammonia spray device has the 2-5 layers of spaced set.Further preferably,
Ammonia spray device has 3 layers of spaced set, and the spacing between adjacent two layers ammonia spray device is 30-50cm.
In order to further improve denitrification efficiency, every layer of ammonia spray device includes spray heads more than 5 rows, adjacent two row
Spray head position be staggered；The spacing of adjacent two rows spray head is 18-22cm.
In order to further improve denitrification efficiency, the spacing between adjacent two spray head is 15-20cm.
In order to further improve denitrification efficiency, the spacing washed between demister and circulated sprinkling device is 50-80cm；
Spacing between circulated sprinkling device and ammonia spray device is 40-60cm；Spacing between ammonia spray device and airflow uniform distribution device
For 50-70cm.
During work, the flue gas after removing dust device dedusting enters gas gas blender, while ozone enters caused by ozone generator
Enter gas gas blender and smoke contacts and occur oxidation reaction, the NO in flue gas is oxidized to be dissolved in the NO of water2、N2O3、N2O5Deng high price
State nitrogen oxides, part sulfur dioxide are oxidized to sulfur trioxide；Oxidized flue gas enters absorbing reaction by gas approach
Tower, flue gas rise through airflow uniform distribution device, the ammonia counter current contacting down sprayed with ammonia spray device, circulated sprinkling device, slurries
Circulated sprinkling device is pumped into by circulation, realizes the cyclic absorption to nitrogen oxysulfide in flue gas, in this stage, flue gas is through ammonia
After water multilayer circulation spray, more than 90% vulcanization toxic gas and NO2Gas will be removed in this purifying area, while remaining
10% or so NOx gases continue to rise, and doctor solution is in a part of NH caused by circulation desulfurization4HSO3Given birth to after adsorbing remaining NO
Into (NH4)2SO4And H2SO3, N2；Enter demisting area after flue gas desulfurization and denitrification, droplet larger in flue gas, drop are removed through demister
Moisture in low flue gas, the clean flue gas after demisting is dehydrated are discharged from net cigarettes outlet；Absorb spray liquid and fall into slurry pool,
Accessory substance sulfate is discharged through ammonium sulfate excavationg pump.
Above-mentioned efficient flue gas desulfurization and denitrification system, can be at low ambient temperatures to NOx, SOx processing in flue gas, greatly
Big to improve denitrification efficiency, desulfuration efficiency is up to more than 99%, and denitration efficiency is up to more than 95%.Low-temperature denitrifying system works
When, ozone gas caused by ozone generator enters blender and smoke contacts and occurs oxidation reaction, and the NO in flue gas is oxidized to
It is dissolved in the NO of water2、N2O3、N2O5Etc. high-valence state nitrogen oxides, part sulfur dioxide is oxidized to sulfur trioxide, after mixed oxidization
Mixed gas enters in absorbing reaction tower the alkali liquor absorption sprayed from absorbing reaction tower bottom, ensures nitrite in slurry pool
Can be fully oxidized with sulphite etc., the absorption efficiency of nitrogen oxides and oxysulfide is improved, is taken off simultaneously so as to improve ozone
The removal efficiency of nitrogen desulfurization.Flue gas after elution is administered is discharged by absorbing reaction top of tower after demister demisting, finally by chimney
It is discharged into air.
The NM technology of the utility model is with reference to prior art.
The utility model utilizes the high-efficiency desulfurization denitrating system of ozone oxidation, has the advantages that, 1) ozone denitration
It is safe, it is not necessary to the toxic gas such as liquefied ammonia；It is irritant and SCR denitration needs liquefied ammonia or urea pyrolysis that ammonia is made
Toxic gas discharges；2) ozone denitration operating cost is low；SCR denitration needs to build ammonia area or urea pyrolysis device, substantial increase
Construction cost, SCR also have catalyst attrition；3) without the escaping of ammonia and ammonia pollution；SCR denitration has the escaping of ammonia, and neighbouring environment is produced
Influence；4) ozone denitration mitigates operations staff's labor intensity without cumbersome control unit and detection unit；Absorption tower utilizes original
Desulfurizing tower, without building new reactor.5) reaction time is short, and speed is fast, and ozone is exceedingly fast with NOx reaction speeds, it is only necessary to very
The short time, you can NOX is oxidized to the NO of high-valence state2And N2O5, therefore do not need special consersion unit, it is only necessary in cigarette
Mixed in feed channel, you can carry out；6) complete, purification efficiency height, due to NO is absorbed2With N2O5All it is material soluble in water, only
Need the spray flux of very little, you can thoroughly absorb the NOx in flue gas, be converted into NO3-N and NO2-N, therefore gas cleaning
Efficiency high；7) secondary pollution is not produced.Because the product of ozone and NOx reactions is O2, do not influence to discharge in flue.And
SO can also be improved2Transformation efficiency；8) directly can be washed using desulfurization washing tower, because NOx content is with respect to SO2
For very little, the load of desulfurization washing tower need not be increased substantially；9) floor space is small.
Brief description of the drawings
Fig. 1 is the high-efficiency desulfurization denitrating system structural representation that the utility model utilizes ozone oxidation；
In figure, 1- absorbing reaction towers, 2- ozone generators, 3- gas gas blenders, 4- ammonia water tanks, 5- aqua ammonia pumps, 6- flue gases
Import, 7- net cigarettes outlets, 8- washing demisters, 9- circulated sprinkling devices, 10- ammonia spray devices, 11- airflow uniform distribution devices, 12- slurries
Liquid pool, 13- slurry pool circulating pumps, 14- ammonium sulfate excavationg pumps, 15- dedusters, 16- recovery storage tanks, 17- neat stress, 18- original cigarettes
Gas.
Embodiment
In order to more fully understand the utility model, content of the present utility model is furtherd elucidate with reference to embodiment, but
Content of the present utility model is not limited solely to the following examples.
Embodiment 1
As illustrated, using the high-efficiency desulfurization denitrating system of ozone oxidation, including absorbing reaction tower, ozone generator, remove
Dirt device, gas gas blender, ammonia water tank, aqua ammonia pump, slurry pool circulating pump, ammonium sulfate excavationg pump and recovery storage tank；Absorbing reaction tower
Bottom be provided with gas approach, top and be provided with net cigarettes outlet, from upper between the gas approach and net cigarettes outlet in absorbing reaction tower
It is sequentially arranged under and by washing demister, circulated sprinkling device, ammonia spray device and airflow uniform distribution device, flue gas in absorbing reaction tower
The lower section of import is provided with slurry pool；The inlet communication of the outlet of ozone generator and the outlet of deduster with gas gas blender,
The outlet of gas gas blender connects with the gas approach of absorbing reaction tower；The water inlet of aqua ammonia pump connects with ammonia water tank, aqua ammonia pump
Delivery port connected with ammonia spray device；The water inlet of slurry pool circulating pump connects with the middle and upper part of slurry pool, slurry pool circulation
The delivery port of pump connects with circulated sprinkling device；The water inlet of ammonium sulfate excavationg pump connects with the bottom of slurry pool, ammonium sulfate discharge
The delivery port of pump connects with recovery storage tank.
Ammonia spray device has 3 layers of spaced set, and the spacing between adjacent two layers ammonia spray device is 40cm；Every layer of ammonia
Water spray device includes spray heads more than 5 rows, and the spray head position of adjacent two row is staggered, the spacing of adjacent two rows spray head
For 20cm；Spacing between adjacent two spray head is 18cm.The spacing washed between demister and circulated sprinkling device is 70cm；Follow
Spacing between ring spray thrower and ammonia spray device is 50cm；Spacing between ammonia spray device and airflow uniform distribution device is
60cm。
Embodiment 2
It is substantially the same manner as Example 1, except that:Spacing between adjacent two layers ammonia spray device is 45cm；Every layer
Ammonia spray device includes spray heads more than 5 rows, and the spray head position of adjacent two row is staggered, between adjacent two rows spray head
Away from for 22cm；Spacing between adjacent two spray head is 20cm.The spacing washed between demister and circulated sprinkling device is 60cm；
Spacing between circulated sprinkling device and ammonia spray device is 40cm；Spacing between ammonia spray device and airflow uniform distribution device is
50cm。
In above-mentioned each example during the high-efficiency desulfurization denitrating system work of ozone oxidation, the flue gas after removing dust device dedusting enters gas
Gas blender, while ozone caused by ozone generator enters gas gas blender and smoke contacts and occurs oxidation reaction, in flue gas
NO be oxidized to be dissolved in the NO of water2、N2O3、N2O5Etc. high-valence state nitrogen oxides, part sulfur dioxide is oxidized to sulfur trioxide；Quilt
The flue gas of oxidation enters absorbing reaction tower by gas approach, and flue gas rises through airflow uniform distribution device, with ammonia spray device, circulation
The ammonia counter current contacting that spray thrower down sprays, slurries are pumped into circulated sprinkling device by circulation, realize to nitrogen sulphur oxygen in flue gas
The cyclic absorption of compound, in this stage, flue gas through ammoniacal liquor multilayer circulation spray after, more than 90% vulcanization toxic gas and
NO2Gas will be removed in this purifying area, while the NOx gases of residue 10% or so continue to rise, and doctor solution is in circulation desulfurization
Caused a part of NH4HSO3(NH is generated after adsorbing remaining NO4)2SO4And H2SO3, N2；Enter demisting after flue gas desulfurization and denitrification
Area, remove larger droplet in flue gas through demister, reduce the moisture in flue gas, the clean flue gas after demisting is dehydrated from
Net cigarettes outlet is discharged；Absorb spray liquid and fall into slurry pool, accessory substance sulfate is discharged through ammonium sulfate excavationg pump.
Above-mentioned efficient flue gas desulfurization and denitrification system, can be at low ambient temperatures to NOx, SOx processing in flue gas, greatly
Big to improve denitrification efficiency, desulfuration efficiency is up to more than 99%, and denitration efficiency is up to more than 95%.Low-temperature denitrifying system works
When, ozone gas caused by ozone generator enters blender and smoke contacts and occurs oxidation reaction, and the NO in flue gas is oxidized to
It is dissolved in the NO of water2、N2O3、N2O5Etc. high-valence state nitrogen oxides, part sulfur dioxide is oxidized to sulfur trioxide, after mixed oxidization
Mixed gas enters in absorbing reaction tower the alkali liquor absorption sprayed from absorbing reaction tower bottom, ensures nitrite in slurry pool
Can be fully oxidized with sulphite etc., the absorption efficiency of nitrogen oxides and oxysulfide is improved, is taken off simultaneously so as to improve ozone
The removal efficiency of nitrogen desulfurization.Flue gas after elution is administered is discharged by absorbing reaction top of tower after demister demisting, finally by chimney
It is discharged into air.
Claims (8)
- A kind of 1. high-efficiency desulfurization denitrating system using ozone oxidation, it is characterised in that：Occur including absorbing reaction tower, ozone Device, deduster, gas gas blender, ammonia water tank, aqua ammonia pump, slurry pool circulating pump, ammonium sulfate excavationg pump and recovery storage tank；Absorb anti- Answer the bottom of tower to be provided with gas approach, top and be provided with net cigarettes outlet, between the gas approach and net cigarettes outlet in absorbing reaction tower It is sequentially arranged from top to bottom by washing demister, circulated sprinkling device, ammonia spray device and airflow uniform distribution device, in absorbing reaction tower The lower section of gas approach is provided with slurry pool；The import of the outlet of ozone generator and the outlet of deduster with gas gas blender connects Logical, the outlet of gas gas blender connects with the gas approach of absorbing reaction tower；The water inlet of aqua ammonia pump connects with ammonia water tank, ammoniacal liquor The delivery port of pump connects with ammonia spray device；The water inlet of slurry pool circulating pump connects with the middle and upper part of slurry pool, and slurry pool follows The delivery port of ring pump connects with circulated sprinkling device；The water inlet of ammonium sulfate excavationg pump connects with the bottom of slurry pool, ammonium sulfate row The delivery port for going out pump connects with recovery storage tank.
- 2. the high-efficiency desulfurization denitrating system of ozone oxidation is utilized as claimed in claim 1, it is characterised in that：Ammonia spray device has The 2-5 layers of spaced set.
- 3. the high-efficiency desulfurization denitrating system of ozone oxidation is utilized as claimed in claim 2, it is characterised in that：Ammonia spray device has 3 layers of spaced set, the spacing between adjacent two layers ammonia spray device is 30-50cm.
- 4. the high-efficiency desulfurization denitrating system of ozone oxidation is utilized as claimed in claim 2, it is characterised in that：Every layer of ammonia spray Device includes spray heads more than 5 rows, and the spray head position of adjacent two row is staggered；The spacing of adjacent two rows spray head is 18- 22cm。
- 5. the high-efficiency desulfurization denitrating system of ozone oxidation is utilized as claimed in claim 4, it is characterised in that：Adjacent two spray head Between spacing be 15-20cm.
- 6. the high-efficiency desulfurization denitrating system using ozone oxidation as described in claim 1-5 any one, it is characterised in that：Water The spacing removed between day with fog and circulated sprinkling device is 50-80cm.
- 7. the high-efficiency desulfurization denitrating system using ozone oxidation as described in claim 1-5 any one, it is characterised in that：Follow Spacing between ring spray thrower and ammonia spray device is 40-60cm.
- 8. the high-efficiency desulfurization denitrating system using ozone oxidation as described in claim 1-5 any one, it is characterised in that：Ammonia Spacing between Water spray device and airflow uniform distribution device is 50-70cm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110420557A (en) * | 2019-08-19 | 2019-11-08 | 广东佳德环保科技有限公司 | A kind of wet desulphurization denitration absorption plant |
| CN112439318A (en) * | 2019-09-05 | 2021-03-05 | 大连海事大学 | High-efficient SOx/NOx control integration system of low temperature tail gas |
| CN113101795A (en) * | 2021-03-26 | 2021-07-13 | 吴崇铭 | Direct flue gas coupling system for microalgae cultivation and treatment method thereof |
| CN113101791A (en) * | 2021-03-26 | 2021-07-13 | 吴崇铭 | System and method for removing VOCs (volatile organic compounds) by flue gas desulfurization, denitrification and oxidation at low temperature |
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2017
- 2017-05-03 CN CN201720480807.9U patent/CN206911092U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110420557A (en) * | 2019-08-19 | 2019-11-08 | 广东佳德环保科技有限公司 | A kind of wet desulphurization denitration absorption plant |
| CN112439318A (en) * | 2019-09-05 | 2021-03-05 | 大连海事大学 | High-efficient SOx/NOx control integration system of low temperature tail gas |
| CN113101795A (en) * | 2021-03-26 | 2021-07-13 | 吴崇铭 | Direct flue gas coupling system for microalgae cultivation and treatment method thereof |
| CN113101791A (en) * | 2021-03-26 | 2021-07-13 | 吴崇铭 | System and method for removing VOCs (volatile organic compounds) by flue gas desulfurization, denitrification and oxidation at low temperature |
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