CN208824231U - A kind of low-temperature denitration reaction tower and odor at low temperature denitrification apparatus - Google Patents
A kind of low-temperature denitration reaction tower and odor at low temperature denitrification apparatus Download PDFInfo
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- CN208824231U CN208824231U CN201821594650.3U CN201821594650U CN208824231U CN 208824231 U CN208824231 U CN 208824231U CN 201821594650 U CN201821594650 U CN 201821594650U CN 208824231 U CN208824231 U CN 208824231U
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Abstract
The utility model discloses a kind of low-temperature denitration reaction towers, the reaction tower is divided into urea liquid storage section, absorbing reaction section and urea spray section along flow of flue gas direction, urea injection system is equipped in the urea spray section, the denitrating tower side bottom is equipped with smoke inlet, there is multiple filling layers layer along flow of flue gas direction arranged for interval in the absorbing reaction section, it is equipped with cloth compression ring between adjacent two layers packing layer, further includes the liter gas cap being disposed therein between two layers of packing layer.The invention also discloses a kind of odor at low temperature denitrification apparatus comprising the low-temperature denitration reaction tower.The utility model has structure simple, operate it is easy, and the advantages of can guarantee denitration efficiency.
Description
Technical field
The utility model belongs to denitration equipment technology field more particularly to a kind of low-temperature denitration reaction tower and odor at low temperature is de-
Nitre device.
Background technique
At present in coke oven industry, the flue gas in coke oven contains the nitrogen oxides of high concentration (about 700mg/Nm3)
Ambient enviroment and the life of people can be seriously affected if be directly discharged in atmosphere without purified treatment with the flue dust of high concentration
Life health.Requirement with the execution of " discharge standard of air pollutants ", to the discharged nitrous oxides in coke oven flue gas
It is higher and higher.
Ozone denitration technology is that low-temperature oxidation method of denitration is a kind of, and Ozonation denitration is mainly the strong oxygen for utilizing ozone
The property changed carries out oxidation and denitration, is soluble high-valence state nitrogen oxides by insoluble lower valency nitrogen oxides, is then washing
It washs nox adsorption in tower or desulfurizing tower, achievees the purpose that removing.Patent 201721604511.X discloses a kind of sintering
Flue gas low-temperature denitrification apparatus, but the device still has the relatively low problem of denitration efficiency, therefore, how to guarantee odor at low temperature
Denitration efficiency is a technical problem that technical personnel in the field need to solve at present.
Utility model content
The application aims to solve the problem that one of the technical problems existing in the prior art.For this purpose, one of the purpose of this utility model
It is to provide a kind of structure simple, operates easy, denitration effect good low-temperature denitration reaction tower and odor at low temperature denitrification apparatus.
In order to solve the above technical problems, the utility model adopts the following technical solution:
A kind of low-temperature denitration reaction tower, the reaction tower are divided into urea liquid storage section, absorbing reaction along flow of flue gas direction
Section and urea spray section, the urea spray section is interior to be equipped with urea injection system, and the denitrating tower side bottom enters equipped with flue gas
Mouthful, there is multiple filling layers layer along flow of flue gas direction arranged for interval in the absorbing reaction section, is equipped between adjacent two layers packing layer
Cloth compression ring further includes the liter gas cap being disposed therein between two layers of packing layer.
Further, demister is additionally provided between the urea spray section and the exhanst gas outlet for reacting column overhead.
Further, the urea injection system includes the spray tube being connected to urea liquid storage section, the spray tube and urine
The pipeline that plain liquid storage section is connected is pumped equipped with tower outer circulation.
Further, the first solution distributor is equipped between the spray tube and adjacent described filler layer.
Further, the second solution is equipped between described liter of gas cap and described filler layer below liter gas cap to be distributed
Device.
A kind of odor at low temperature denitrification apparatus, including the oxidation unit and above-mentioned low temperature for carrying out ozone oxidation to flue gas
Denitration reaction tower, the outlet side of the oxidation unit are connected to the smoke inlet.
Further, the oxidation unit includes flue, is disposed in the flue along flue gas flow channel direction smelly
Oxygen jet pipe row group and mixed flow component for stirring flue gas, be equipped on the ozone jet pipe in ozone jet pipe row's group nozzle and
It is connected to ozone generator.
Further, the mixed flow component includes at least two rows of static mixing tube rows sequentially arranged along flue gas flow channel direction
Group, every row's static mixing tube row group includes the more static mixing tubes being arranged side by side, and the static mixing tube in adjacent row group interlocks
Arrangement.
Further, each ozone jet pipe is equipped with multiple nozzles, and the injection direction of the nozzle is along flue gas stream
To.
Further, axis of the axis direction of the ozone jet pipe and static mixing tube perpendicular to flue where flue gas
Direction.
Coke oven flue gas of the utility model low-temperature denitration reaction tower after ozone oxidation enters from the smoke inlet of tower body, into
Diffusion is flowed through cloth compression ring from bottom to top after entering in tower, the solution sprayed from urea injection system leans on gravity stream through a liter gas cap drainage
Under, gas from bottom to top passes through packing layer and membranaceous liquid touches, then mutual absorbing reaction, by the nitrogen oxidation in flue gas
Object is reduced into nitrogen and carbon dioxide, and the flue gas of rising is discharged into atmosphere from tower top exhanst gas outlet, and flue gas passes through cloth compression ring
Stream diffusion, urea liquid is in membranaceous liquid and smoke contacts by rising gas cap effect, to ensure that denitration efficiency, reduces cigarette
Nitrous oxides concentration in gas.
Since ozone is extremely easy in decomposition, and the reaction speed of ozone and NO are quickly, in order to guarantee the efficiency of ozone denitration, it is necessary to
Guarantee ozone once being sufficiently mixed into flue with flue gas, the odor at low temperature denitrification apparatus of the utility model is sprayed from ozone jet pipe
The flue gas flowed in ozone out and flue needs to flow through static mixing tube after mixing, and the mixed flue gas containing ozone collides static
Mixing tube changes flow direction, makes the mixed flue gas to meet mixing diffusion uniformly, can when especially static mixing tube is criss-cross arranged
Mixing efficiency is further increased, because ozone and flue gas are sufficiently mixed, and then ensure that denitration efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model low-temperature denitration reaction tower；
Fig. 2 is the structural schematic diagram of the oxidation unit of the utility model；
Fig. 3 is the vertical view attached drawing of the oxidation unit of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, a kind of low-temperature denitration reaction tower, the reaction tower along flow of flue gas direction be divided into urea liquid storage section 1,
Absorbing reaction section 2 and urea spray section 3, urea spray section 3 is interior to be equipped with urea injection system 4, and denitrating tower side bottom is equipped with cigarette
Gas entrance 5 has a multiple filling layers layer 6 along flow of flue gas direction arranged for interval in absorbing reaction section 2, between adjacent two layers packing layer 6
It further include the liter gas cap 8 being disposed therein between two layers of packing layer 6 equipped with cloth compression ring 7.Coke oven flue gas after ozone oxidation from
The smoke inlet 5 of tower body enters, and flows diffusion through cloth compression ring 7 from bottom to top into after in tower, sprays from urea injection system 4
Solution is through the drainage of liter gas cap 8 under gravity stream, and gas from bottom to top passes through packing layer 6 and contacts with membranaceous liquid, then mutually
Between absorbing reaction, the nitrogen oxides in flue gas is reduced into nitrogen and carbon dioxide, the flue gas of rising is from tower top exhanst gas outlet
It is discharged into atmosphere, flue gas flows diffusion by cloth compression ring 7, and urea liquid is in membranaceous liquid and cigarette by rising the effect of gas cap 8
Gas contact reduces the nitrous oxides concentration in flue gas to ensure that denitration efficiency.It, can basis as the number of plies of packing layer 6
Specific denitration requires to be adaptively adjusted, and the material of the use of packing layer is the prior art, and details are not described herein.
It should be noted that solution is taken out of in order to prevent in actual design, urea spray section 3 with react column overhead
Exhanst gas outlet between be also provided with demister 9, the flue gas after reaction by demister 9 remove droplet after from tower top chimney arrange
Out, into atmosphere.
It is envisioned that in practical applications, urea injection system 4 can specifically include to be connected to urea liquid storage section
Spray tube is equipped with the spout towards packing layer 6 on spray tube, sets on the pipeline 10 that spray tube is connected with urea liquid storage section 1
There is tower outer circulation to pump 11.It is equipped with the first solution distributor 12 between spray tube and adjacent packing layer 6, rise gas cap 8 and is located at liter
It is equipped with the second solution distributor 13 between the packing layer 6 of 8 lower section of gas cap, the urea liquid sprayed from spout is equal by distributor
Cloth so as to further increase the reaction efficiency with flue gas, and then improves denitration efficiency.
Referring to figures 1-3, a kind of odor at low temperature denitrification apparatus, including the oxidation unit for carrying out ozone oxidation to flue gas
And above-mentioned low-temperature denitration reaction tower, the outlet side of oxidation unit are connected to smoke inlet.Inlet end of the flue gas from oxidation unit
Pass into ozone oxidation at after higher nitrogen oxides enter denitrating tower in carry out denitration reaction.
As a kind of preferred embodiment of the utility model, oxidation unit includes flue 14, and flue 14 is interior along flue gas flow channel
Direction is disposed with ozone jet pipe row group 15 and the mixed flow component 16 for stirring flue gas, the ozone in ozone jet pipe row group 15
Nozzle 17 is equipped on jet pipe, each ozone jet pipe is connected to ozone generator (not shown), provides by ozone generator
Ozone is the prior art, details are not described herein as the specific structure of ozone generator.
Specifically, mixed flow component 16 includes at least two rows of static mixing tube row groups 161 along flue gas flow channel direction sequentially, often
Arranging static mixing tube row group 161 includes the more static mixing tubes being arranged side by side, and the static mixing tube in adjacent row group interlocks cloth
It sets.Specifically, the outlet side of flue and the smoke inlet 5 of denitrating tower are docked and connected, the two of ozone jet pipe and static mixing tube
End is welded to connect with the inner sidewall of flue 14 respectively.Flue gas enters from 14 inlet end of flue, the ozone ejected from ozone jet pipe
Static mixing tube is flowed through after mixing with the flue gas flowed in flue 14, the mixed flue gas collision static mixing tube containing ozone changes
Flow direction makes the mixed flue gas to meet mixing diffusion uniformly, and then ensure that denitration efficiency.Certainly, mixed flow component 16 can also be adopted
With other existing structures such as paddle, details are not described herein.
Preferably, the quantity of static mixing tube row group 161 is two rows, and the static state in two rows of static mixing tube row groups 161 is mixed
It closes pipe to be criss-cross arranged, can realize the abundant of ozone and flue gas in the case where it is not very big that flue gas flow rate, which reduces, in this way
Mixing.
To those skilled in the art, multiple nozzles 17, ozone jet pipe can be symmetrically arranged on each ozone jet pipe
Row's group 15 is made of more ozone jet pipes arranged side by side, and the injection direction of each nozzle is along flue gas flow direction, i.e. 17 spout of nozzle
It is designed along flue gas direction, to guarantee that ozone is mixed with flue gas.The axis direction of each ozone jet pipe and each static mixing tube is vertical
The axis direction of flue where flue gas, as the particular number of ozone jet pipe, static mixing tube and nozzle 17, this field skill
Art personnel can require to be adaptively adjusted according to specific design and denitration, and details are not described herein.
Above-described embodiment is only to clearly demonstrate examples for clearly illustrating the present invention, rather than the restriction to embodiment.
For those of ordinary skill in the art, other various forms of variations can also be made on the basis of the above description
Or it changes.Here without can not be also exhaustive to all embodiments.And the obvious variation thus amplified out
Or it changes among still in the protection scope of the utility model.
Claims (10)
1. a kind of low-temperature denitration reaction tower, which is divided into urea liquid storage section, absorbing reaction section along flow of flue gas direction
With urea spray section, the urea spray section is interior to be equipped with urea injection system, and the denitrating tower side bottom is equipped with smoke inlet,
It is characterized by: having multiple filling layers layer, adjacent two layers packing layer along flow of flue gas direction arranged for interval in the absorbing reaction section
Between be equipped with cloth compression ring, further include the liter gas cap being disposed therein between two layers of packing layer.
2. low-temperature denitration reaction tower according to claim 1, it is characterised in that: the urea spray section with react column overhead
Exhanst gas outlet between be additionally provided with demister.
3. low-temperature denitration reaction tower according to claim 1, it is characterised in that: the urea injection system includes and urea
The spray tube of liquid storage section connection, the pipeline that the spray tube is connected with urea liquid storage section are pumped equipped with tower outer circulation.
4. low-temperature denitration reaction tower according to claim 3, it is characterised in that: the spray tube and the adjacent filler
The first solution distributor is equipped between layer.
5. low-temperature denitration reaction tower according to claim 1, it is characterised in that: described liter of gas cap rises below gas cap with being located at
Described filler layer between be equipped with the second solution distributor.
6. a kind of odor at low temperature denitrification apparatus, it is characterised in that: including for flue gas carry out ozone oxidation oxidation unit with
And the described in any item low-temperature denitration reaction towers of claim 1-5, the outlet side of the oxidation unit and the smoke inlet connect
It is logical.
7. odor at low temperature denitrification apparatus according to claim 6, it is characterised in that: the oxidation unit includes flue, institute
It states in flue and is disposed with ozone jet pipe row group and the mixed flow component for stirring flue gas along flue gas flow channel direction, it is described smelly
Ozone jet pipe in oxygen jet pipe row's group is connected to ozone generator and is equipped with nozzle on it.
8. odor at low temperature denitrification apparatus according to claim 7, it is characterised in that: the mixed flow component includes along flue gas stream
At least two rows of static mixing tube row's groups that road direction is sequentially arranged, every row's static mixing tube row group are arranged side by side quiet including more
State mixing tube, the static mixing tube interlaced arrangement in adjacent row group.
9. odor at low temperature denitrification apparatus according to claim 8, it is characterised in that: the ozone jet pipe and static mixing
Axis direction of the axis direction of pipe perpendicular to flue where flue gas.
10. according to the described in any item odor at low temperature denitrification apparatus of claim 7-9, it is characterised in that: each ozone jet pipe
Multiple nozzles are equipped with, and the injection direction of the nozzle is along flue gas flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821594650.3U CN208824231U (en) | 2018-09-28 | 2018-09-28 | A kind of low-temperature denitration reaction tower and odor at low temperature denitrification apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821594650.3U CN208824231U (en) | 2018-09-28 | 2018-09-28 | A kind of low-temperature denitration reaction tower and odor at low temperature denitrification apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN208824231U true CN208824231U (en) | 2019-05-07 |
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ID=66317786
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|---|---|---|---|
| CN201821594650.3U Active CN208824231U (en) | 2018-09-28 | 2018-09-28 | A kind of low-temperature denitration reaction tower and odor at low temperature denitrification apparatus |
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| Country | Link |
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| CN (1) | CN208824231U (en) |
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2018
- 2018-09-28 CN CN201821594650.3U patent/CN208824231U/en active Active
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