CN206660927U - A kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus - Google Patents
A kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus Download PDFInfo
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- CN206660927U CN206660927U CN201720433837.4U CN201720433837U CN206660927U CN 206660927 U CN206660927 U CN 206660927U CN 201720433837 U CN201720433837 U CN 201720433837U CN 206660927 U CN206660927 U CN 206660927U
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Abstract
The utility model discloses a kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus.Ozone denitrification apparatus is provided with the flue of the coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus, ozone is prepared using ozone generator, ozone gas is uniformly arrived in flue section by distribution device, flue gas blender is set in the duct, makes ozone and contains NOXFlue gas be sufficiently mixed in flue and oxidation reaction occur, the full and uniform mixing within the extremely short time of ozone and flue gas can effectively be ensured, ozone utilization rate and nitric oxide production efficiency are improved, the time required to significantly shortening reaction, has ensured the high efficiency of ozone denitration.
Description
Technical field
It the utility model is related to coal-fired flue-gas process field, more particularly to a kind of coal-burning boiler with ozone denitrification apparatus
Low-temperature flue gas processing unit.
Background technology
At present, the major technique that denitrating flue gas uses is that SCR technology, SNCR technologies or two kinds of technical tie-ups use, but
These technologies there are certain requirements to flue-gas temperature, when coal burning system has been in heater stage or underrun stage, SCR or
SNCR reaction efficiencies decline to a great extent, and it is exceeded to will result directly in discharged nitrous oxides.
Gas denitrifying technology can be divided into the major class of dry and wet two, the wherein SCR in Dry denitration at present
（SCR）And SNCR（SNCR）Technology is that market is most widely used（Account for 60% denitrating flue gas market）, technology most into
Ripe denitration technology, its principle are the spray reducing agents such as ammonia or urea into flue gas, at high temperature directly（Or the collaboration of catalyst
Under）Redox reaction occurs with the NOx in flue gas, NOx is reduced into nitrogen and water.But the technology also has its huge limitation
Property, because chemical reaction needs to carry out at high temperature, and for medium small boiler and Industrial Boiler, exhaust gas temperature is far not
The high temperature required for chemical reaction can be reached, therefore low-temperature denitration of flue gas technology is just as the necessary of Environmental Protection Market.
Denitration of boiler smoke is the requirement of current environmental protection, existing low-NO_x combustion technology, SCR technology and SNCR technologies
The requirement of all users can not be met, denitrating flue gas effect is bad, and standard requirement is extremely difficult to after fume emission.
Low-temperature denitration of flue gas technology is with low-temperature oxidation technique（LoTOx）It is the most easy and effective, due to the nitrogen oxidation in flue gas
It is NO that thing, which mainly forms,（Account for 95%）, NO is insoluble in water, and the NO of high-valence state2、N2O5Etc. water-soluble generation HNO2And HNO3, it is molten
Solution ability greatly improves, it is easy to the means such as sprays by alkali lye and deviates from from flue gas it.NO in flue gas is converted into height
Valence state, stronger oxidant need to be introduced, in numerous oxidants, ozone is the strong oxidizer of most environment-protecting clean, in Efficient Conversion
NO is not to any secondary pollution is left during high-valence state, in addition different from OH, HO2Deng, working environment is severe, freely
The base time-to-live is very short, and energy consumption is higher, O3Life cycle it is relatively long, O will be produced after a small amount of oxygen or air ionization3, so
It is sent into afterwards in flue gas, energy consumption can be significantly reduced.Desulphurization denitration, which is carried out, currently with ozone has engineering example abroad,
China is also in the exploratory stage.
Ozone denitration technology more adapts to environmental protection increasingly strict requirements than traditional flue gas desulfurization and denitration technique, and equipment is thrown
Provide the advantages that low, floor space is small, simple system；Other oxidising agents are substituted with ozone, control denitration anti-by special process
Process is answered, the product that alkali liquor absorption reacts is existed in solid form, realizes gaseous contaminant（Nitrogen oxides）Solidification at
Reason, does not produce secondary pollution；Not only there is good removal effect to NOx using the high-level oxidation technology of ozone, and to cigarette
Other noxious pollutants in gas, such as heavy metal Hg also have certain removal ability；It is de- that oxidative absorption etc. is carried out at low temperature
Nitre process, the energy recovery for being advantageous to boiler utilize, and reduce engineering construction difficulty.Taken off using domestic existing more ripe wet method
Sulphur technique is simultaneously improved, and is made desulphurization denitration while is carried out.
Utility model content
In order to solve the above technical problems, the utility model devises a kind of coal-burning boiler low temperature with ozone denitrification apparatus
Flue gas processing device.
The utility model adopts the following technical scheme that：
A kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus, including electrostatic precipitator and desulfurization
Tower, flue is communicated between electrostatic precipitator and desulfurizing tower, is provided with ozone denitrification apparatus at flue, ozone denitrification apparatus include according to
It is the ozone generator of secondary connection, ozone gas main pipeline, ozone gas pipeline distributor, the horizontal subtube of ozone gas, smelly
The vertical subtube of carrier of oxygen and playpipe, ozone gas pipeline distributor connect the more horizontal subtubes of ozone gas, every
The horizontal subtube of ozone gas connects the vertical subtube of an ozone gas, and flue is inserted in the vertical subtube bottom of ozone gas,
More playpipes are vertically distributed with the vertical subtube bottom insertion flue portion of ozone gas, and every injection pipe end is set
Put hat baffle plate, the uniform multiple oblique spouts of the circumferencial direction at the top of playpipe.
Preferably, the angle of the opening direction and ozone of the tiltedly spout in playpipe between flow direction is in sharp
Angle.
Preferably, the angle of the tiltedly opening direction of spout and ozone in injection branch pipe between flow direction is in
30-60 degree.
Preferably, the internal diameter of the tiltedly spout is 1-5mm.
Preferably, the more playpipes are along the vertical subtube vertical direction spaced set of ozone gas.
Preferably, it is provided with flow control valve on the vertical subtube of the every ozone gas.
Compared with prior art, should be set at the flue with the coal-burning boiler low-temperature flue gas processing unit of ozone denitrification apparatus
Ozone denitrification apparatus is equipped with, ozone is prepared using ozone generator, ozone gas is uniformly arrived by distribution device by flue
Section, flue gas blender is set in the duct, makes ozone and contains NOXFlue gas be sufficiently mixed and aoxidize in flue
Reaction.By the NO in flue gasXIt is oxidized to the NO easily absorbed2And N2O5.Ammonia process desulfurization washing tower is recycled, to NO2And N2O5Enter
Row absorbing reaction, generation nitric acid ammonia and nitrous acid ammonia.After being finally enriched with, concentrate together with sulfate again, drying, as nitrogenous fertilizer plus
To utilize.
Its key reaction formula is：
NO+O3=NO2+O2
2NO2+O3=N2O5+O2
2NO2+2NH3+H2O=NH4NO2+NH4NO3
N2O5+2NH3+H2O=2NH4NO3
Ensure that the output flow of each distribution pipe and pressure are balanced using ozone conveying main pipe so that the ozone of each distribution pipe is defeated
Output is consistent；By the use of the branched pipeline for being provided with spray-hole as distribution pipe, the perforate gross area is less than ozone conveying main pipe
Sectional area, ensure ozone and the jet velocity and pressure in flue gas mixed process；Using flue gas blender is set in pipeline, ensure
Ozone mixes uniform quick with flue gas.Ozone denitration is adaptable by force, floor space is small, the spy of decorum flexible adjustment
Point, nitric oxide that can be in the efficient oxidation flue gas simultaneously using follow-up desulphurization plant remove and effectively solve boiler smoke nitrogen
Oxide contaminant problem.Ozone denitration technology the efficiency mainly utilization rate by ozone in oxidation reaction process and reaction time
Limitation.
The utility model can effectively ensure the full and uniform mixing within the extremely short time of ozone and flue gas, improve ozone
Utilization rate and nitric oxide production efficiency, the time required to significantly shortening reaction, the high efficiency of ozone denitration is ensured.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present utility model；
Fig. 2 is a kind of structural representation that ozone denitrification apparatus is located at flue outer portion in the utility model；
Fig. 3 is a kind of structural representation that ozone denitrification apparatus is located at flue inside points in the utility model；
In figure：1st, ozone generator, 2, ozone gas main pipeline, 3, ozone gas pipeline distributor, 4, ozone gas
Horizontal subtube, 5, the vertical subtube of ozone gas, 6, flow control valve, 7, playpipe, 8, oblique spout, 9, shape for hat baffle plate, 10,
Electrostatic precipitator, 11, flue, 12, desulfurizing tower.
Embodiment
Below by specific embodiment, and with reference to accompanying drawing, the technical solution of the utility model is made further specifically to retouch
State：
Embodiment：Such as accompanying drawing 1, shown in accompanying drawing 2 and accompanying drawing 3, a kind of coal-burning boiler low temperature cigarette with ozone denitrification apparatus
Flash Gas Compression Skid System, including electrostatic precipitator 10 and desulfurizing tower 12, are communicated with flue 11, its feature between electrostatic precipitator and desulfurizing tower
It is that ozone denitrification apparatus is provided with the flue, ozone denitrification apparatus includes ozone generator 1, the ozone gas being sequentially communicated
Body main pipeline 2, ozone gas pipeline distributor 3, the horizontal subtube 4 of ozone gas, the vertical subtube 5 of ozone gas and injection
Pipe 7, the ozone gas pipeline distributor connection horizontal subtube of six roots of sensation ozone gas, the horizontal subtube connection of every ozone gas
The vertical subtube of a piece ozone gas, the vertical subtube bottom insertion flue of ozone gas, the vertical subtube bottom of ozone gas
Ten six roots of sensation playpipes are vertically distributed with insertion flue portion, and every injection pipe end sets hat baffle plate 9, sprays tube top
The uniform multiple tiltedly spouts 8 of the circumferencial direction in portion, the folder of the opening direction and ozone of oblique spout in playpipe between flow direction
Angle is in 45 degree, and the internal diameter of oblique spout is 3mm, and ten six roots of sensation playpipes are equidistantly set along the vertical subtube vertical direction of ozone gas
Put, flow control valve 6 is provided with the vertical subtube of every ozone gas.
Ozone denitration dress is provided with the flue of the coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus
Put, ozone is prepared using ozone generator, ozone gas is uniformly arrived in flue section by distribution device, set in the duct
Flue gas blender is put, makes ozone and contains NOXFlue gas be sufficiently mixed in flue and oxidation reaction occur.By in flue gas
NOXIt is oxidized to the NO easily absorbed2And N2O5.Ammonia process desulfurization washing tower is recycled, to NO2And N2O5Carry out absorbing reaction, generation
Nitric acid ammonia and nitrous acid ammonia.Finally it is enriched with, concentrates together with sulfate again, after drying, is used as nitrogenous fertilizer.
Its key reaction formula is：
NO+O3=NO2+O2
2NO2+O3=N2O5+O2
2NO2+2NH3+H2O=NH4NO2+NH4NO3
N2O5+2NH3+H2O=2NH4NO3
Ensure that the output flow of each distribution pipe and pressure are balanced using ozone conveying main pipe so that the ozone of each distribution pipe is defeated
Output is consistent；By the use of the branched pipeline for being provided with spray-hole as distribution pipe, the perforate gross area is less than ozone conveying main pipe
Sectional area, ensure ozone and the jet velocity and pressure in flue gas mixed process；Using flue gas blender is set in pipeline, ensure
Ozone mixes uniform quick with flue gas.Ozone denitration is adaptable by force, floor space is small, the spy of decorum flexible adjustment
Point, nitric oxide that can be in the efficient oxidation flue gas simultaneously using follow-up desulphurization plant remove and effectively solve boiler smoke nitrogen
Oxide contaminant problem.Ozone denitration technology the efficiency mainly utilization rate by ozone in oxidation reaction process and reaction time
Limitation.
The utility model can effectively ensure the full and uniform mixing within the extremely short time of ozone and flue gas, improve ozone
Utilization rate and nitric oxide production efficiency, the time required to significantly shortening reaction, the high efficiency of ozone denitration is ensured.
Embodiment described above is a kind of preferable scheme of the present utility model, not the utility model is made any
Formal limitation, there are other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (6)
1. a kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus, including electrostatic precipitator and desulfurizing tower,
Flue is communicated between electrostatic precipitator and desulfurizing tower, it is characterized in that, ozone denitrification apparatus, ozone denitration are provided with the flue
Ozone generator, ozone gas main pipeline, ozone gas pipeline distributor, the ozone gas that device includes being sequentially communicated are horizontal
The vertical subtube of subtube, ozone gas and playpipe, ozone gas pipeline distributor connect horizontal point of more ozone gas
Pipeline, the horizontal subtube of every ozone gas connect the vertical subtube of an ozone gas, the vertical subtube bottom of ozone gas
Flue is inserted, more playpipes, every spray is vertically distributed with the vertical subtube bottom insertion flue portion of ozone gas
Penetrate pipe end and hat baffle plate is set, the uniform multiple oblique spouts of the circumferencial direction at the top of playpipe.
2. a kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus according to claim 1, it is special
Sign is, the angle of the opening direction and ozone of the tiltedly spout in playpipe between flow direction is at an acute angle.
3. a kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus according to claim 2, it is special
Sign is that the angle of the tiltedly opening direction of spout and ozone in injection branch pipe between flow direction is in 30-60 degree.
4. a kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus according to claim 1, it is special
Sign is that the internal diameter of the tiltedly spout is 1-5mm.
5. a kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus according to claim 1, it is special
Sign is, the more playpipes are along the vertical subtube vertical direction spaced set of ozone gas.
6. a kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus according to claim 1, it is special
Sign is, flow control valve is provided with the vertical subtube of the every ozone gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720433837.4U CN206660927U (en) | 2017-04-24 | 2017-04-24 | A kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus |
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| CN201720433837.4U CN206660927U (en) | 2017-04-24 | 2017-04-24 | A kind of coal-burning boiler low-temperature flue gas processing unit with ozone denitrification apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108636085A (en) * | 2018-04-24 | 2018-10-12 | 北京宜泽环保科技有限责任公司 | A kind of high-pressure discharging device and exhaust treatment system |
| CN112479295A (en) * | 2020-10-26 | 2021-03-12 | 国电龙源电力技术工程有限责任公司 | System and method for evaporating desulfurization wastewater by using waste heat in flue |
-
2017
- 2017-04-24 CN CN201720433837.4U patent/CN206660927U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108636085A (en) * | 2018-04-24 | 2018-10-12 | 北京宜泽环保科技有限责任公司 | A kind of high-pressure discharging device and exhaust treatment system |
| CN112479295A (en) * | 2020-10-26 | 2021-03-12 | 国电龙源电力技术工程有限责任公司 | System and method for evaporating desulfurization wastewater by using waste heat in flue |
| CN112479295B (en) * | 2020-10-26 | 2024-03-15 | 国能龙源电力技术工程有限责任公司 | System and method for evaporating desulfurization wastewater by utilizing waste heat in flue |
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