CN206121483U - Selectivity low temperature denitrification facility - Google Patents
Selectivity low temperature denitrification facility Download PDFInfo
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- CN206121483U CN206121483U CN201620520216.5U CN201620520216U CN206121483U CN 206121483 U CN206121483 U CN 206121483U CN 201620520216 U CN201620520216 U CN 201620520216U CN 206121483 U CN206121483 U CN 206121483U
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- absorption tower
- reative cell
- variable frequency
- frequency pump
- controller
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Abstract
The utility model relates to a selectivity low temperature denitrification facility, including liquid storage pot, thinning tank, variable frequency pump, reacting chamber, plasma generator, absorption tower and controller, the consecutive expert of liquid storage pot, thinning tank and variable frequency pump, be equipped with the nozzle on the reacting chamber, nozzle on variable frequency pump's exit linkage to the reacting chamber, plasma generator links to each other with the reacting chamber, the import and the high -temperature flue gas pipeline intercommunication of reacting chamber, the export of reacting chamber and the entry intercommunication that absorbs tower side face bottom, upper portion is equipped with the shower head in the absorption tower, and the shower head passes through pipeline and alkali lye storage tank intercommunication, the top export on absorption tower is equipped with nitric oxide sensor, and nitric oxide sensor links to each other with the signal input part of controller, and the output of controller links to each other with variable frequency pump for the flow of control converter. The device denitration efficiency is high, and low -cost, high efficiency steady operation have been accomplished about all only being half of ordinary denitrification process to denitration investment and running cost.
Description
Technical field
The present invention relates to a kind of denitrification apparatus, especially a kind of selectivity low-temperature denitration device.
Background technology
At present, the selective catalysis reduction of the ripe denitration technology of domestic contrast（SCR）And SNCR
（SNCR）Two kinds, both approaches are all reducing process denitrations, and also a kind of method of denitration is oxidizing process denitration, such as ozone oxidation
Method, hydrogen peroxide oxidation method, permanganate oxidation method etc..
SCR denitration technology is that in the presence of catalyst under the conditions of 320～420 DEG C, the nitrogen oxides in flue gas are selected
The reduction of selecting property, generates N2, reach the purpose of denitrification.In SCR technology, V2O5It is widely used as catalyst load
Body, its optimal catalytic temperature is 302～402 DEG C, most strong in 350 DEG C or so activity.The major defect of SCR denitration technology is to urge
Agent somewhat expensive, accounts for the 40～60% of whole denitrating system device total cost.In addition, catalyst is easily poisoned, blocks, is lost
Deactivation etc., it is the another difficult point of SCR denitration system to increase the service life.
SNCR denitration technology is in the presence of without catalyst, reducing agent to be sprayed in suitable " temperature window " by flue gas
In nitrogen oxides be reduced to harmless nitrogen and water.The technology is typically using spray ammonia, carbamide or hydrogen propylhomoserin in stove as reduction
Agent reduces NOx.NOx reaction of the reducing agent only and in flue gas, typically not with oxygen reaction, the technology do not adopt catalyst, thus this
The method of kind is referred to as SNCR method（SNCR）.Because SNCR techniques are without catalyst, reaction activity is high, because
This must add reducing agent in high-temperature region.When such as denitrfying agent is ammonia, reaction temperature is 850-1100 DEG C, but flue-gas temperature is more than
Ammonia oxidized side reaction can be produced when 1050 DEG C again, NOx is oxidized to, the oxidized reaction rate of ammonia substantially adds when 1100 DEG C
Hurry up.Side reaction not only reduces denitration efficiency, but also can increase the consumption and cost of reducing agent, and economy is greatly lowered.If
The temperature of flue gas is less than 870 DEG C, then anakmetomeres number is greatly reduced, and the response speed of denitration is greatly reduced.Due to reaction temperature
Window ranges are narrower, it is difficult to precise control, the setting of response time and spray ammonia point, switching, by boiler furnace and heating surface cloth
The restriction put.The relatively low generally 30%-50% of denitration efficiency.That is it is hardly formed in burner hearth using SNCR methods stable
Reaction warm area, reaction does not thoroughly cause denitration efficiency very low.
It is low that general oxidizing process denitration is primarily present denitration efficiency, such as hydrogen peroxide oxidation method, permanganate oxidation method, aoxidizes
Efficiency is low and can produce secondary pollution, though and ozone oxidation effect preferably, investment and to run into pump too high causes to be difficult to big
Scope is promoted.
The content of the invention
The purpose of the present invention is the deficiency for existing denitration technology, there is provided a kind of selectivity low-temperature denitration device, its fortune
Row cost is greatly lowered compared with traditional handicraft, safe and efficient, with regard to obtaining very high denitration under conditions of catalyst is not used
Rate.
The key of this device design is the efficient oxidation unit that a kind of air plasma of design activates novel oxidized technology,
It can under cryogenic in selective Quick Oxidation flue gas lower valency nitrogen oxides, then absorbed by alkaline absorption solution and go
Remove.
Technical scheme
A kind of selectivity low-temperature denitration device, including fluid reservoir, thinning tank, variable frequency pump, reative cell, plasma generator,
Absorption tower and controller, fluid reservoir, thinning tank and variable frequency pump are sequentially connected logical；Reative cell is provided with nozzle, the outlet of variable frequency pump
The nozzle being connected on reative cell；Plasma generator is connected with reative cell；The import of reative cell and high-temperature flue gas pipeline communication,
The outlet of reative cell is connected with the entrance of absorption tower side bottom, and absorption tower internal upper part is provided with spray head, and spray head passes through pipeline
Connect with alkali liquor storage tank；The top exit on absorption tower is provided with the letter of NOx sensor, NOx sensor and controller
Number input is connected, and the outfan of controller is connected with variable frequency pump, for controlling the flow of converter.
Further, the top and bottom of the reative cell is equipped with more than one nozzle, reacts more abundant.
Further, the spray head of absorption tower internal upper part is two or more, and the absorption of nitrogen oxides is more abundant.
The method for carrying out denitration using said apparatus：Oxidant in fluid reservoir is measured be pumped in thinning tank carry out it is dilute
Release, high-temperature flue gas enter reative cell by high-temperature flue gas pipeline, NOx sensor will according to the amount of nitrogen oxides of detection
Signal feeds back to controller, and controller controls frequency conversion pump discharge according to the signal of input, so as to control to enter the oxidation of reative cell
The consumption of agent, oxidant mixes and is swashed by moment in the indoor large quantity of air plasma produced with plasma generator of reaction
It is living, by the lower valency nitrogen oxides in the flue gas into reative cell, subsequently enter the alkali liquor sprayed in absorption tower abundant
Absorb, the flue gas after denitration is discharged from absorption tower top exit.Above-mentioned denitration reaction temperature is low temperature（60-100℃）, because
This, cost is greatly lowered, and heat recovery can be reached the energy and made full use of by high-temperature flue gas, economic and environment-friendly.
Denitration efficiency of the present utility model is more than 95%, and denitrification investment and operating cost are only common denitrating technique
Half or so, has accomplished low cost, high-efficiency stable operation.
Description of the drawings
Fig. 1 is the structural representation of this utility model selectivity low-temperature denitration device；
Wherein, 1- fluid reservoirs, 2- thinning tanks, 3- variable frequency pumps, 4- reative cells, 5- plasma generators, 6- nozzles, 7- absorbs
Tower, 8- NOx sensors, 9- controllers, 10- spray heads, 11- alkali liquor storage tanks, 12- high-temperature flue gas pipelines.
Specific embodiment
With reference to the accompanying drawings and examples the invention will be further described.
As shown in figure 1, a kind of selectivity low-temperature denitration device, including fluid reservoir 1, thinning tank 2, variable frequency pump 3, reative cell 4,
Plasma generator 5, absorption tower 7 and controller 9, fluid reservoir 1, thinning tank 2 and variable frequency pump 3 are sequentially connected logical；The top of reative cell 4
Portion and bottom are respectively provided with 3 nozzles 6, and the outlet of variable frequency pump 3 is connected to the nozzle 6 on reative cell 4；Plasma generator 5 with it is anti-
Room 4 is answered to be connected；The import of reative cell 4 is connected with high-temperature flue gas pipeline 12, outlet and the side bottom of absorption tower 7 of reative cell 4
Entrance is connected, and the internal upper part of absorption tower 7 is provided with spray head 10, and spray head 10 is connected by pipeline with alkali liquor storage tank 11；Absorption tower 7
Top exit is provided with NOx sensor 8, and NOx sensor 8 is connected with the signal input part of controller 9, controller 9
Outfan be connected with variable frequency pump 3, for controlling the flow of converter.
When carrying out denitration to high-temperature flue gas, measured being pumped in thinning tank 2 of oxidant in fluid reservoir 1 is diluted,
High-temperature flue gas enter reative cell 4 by high-temperature flue gas pipeline 12, and NOx sensor 8 will according to the amount of nitrogen oxides of detection
Signal feeds back to controller 9, and controller 9 controls the flow of variable frequency pump 3 according to the signal of input, so as to control to enter reative cell 4
The consumption of oxidant, the large quantity of air plasma that oxidant is produced in reative cell 4 with plasma generator 5 mixed and by wink
Between activate, by the lower valency nitrogen oxides in the flue gas into reative cell, subsequently enter the alkali liquor sprayed in absorption tower 7
Fully absorb, the flue gas after denitration is discharged from the top exit of absorption tower 7.
The denitration efficiency of this utility model denitrification apparatus is more than 95%, and denitrification investment and operating cost are only common de-
Half of nitre technique or so, has accomplished low cost, high-efficiency stable operation.
Claims (3)
1. a kind of selectivity low-temperature denitration device, it is characterised in that including fluid reservoir, thinning tank, variable frequency pump, reative cell, etc. from
Electronic generator, absorption tower and controller, fluid reservoir, thinning tank and variable frequency pump are sequentially connected logical；Reative cell is provided with nozzle, frequency conversion
The outlet of pump is connected to the nozzle on reative cell；Plasma generator is connected with reative cell；The import of reative cell and high-temperature flue gas
Pipeline communication, the outlet of reative cell is connected with the entrance of absorption tower side bottom, and absorption tower internal upper part is provided with spray head, spray head
Connected with alkali liquor storage tank by pipeline；The top exit on absorption tower is provided with NOx sensor, NOx sensor and control
The signal input part of device processed is connected, and the outfan of controller is connected with variable frequency pump, for controlling the flow of converter.
2. selectivity low-temperature denitration device as claimed in claim 1, it is characterised in that the top and bottom of the reative cell is equal
It is provided with more than one nozzle.
3. selectivity low-temperature denitration device as claimed in claim 1 or 2, it is characterised in that the spray of the absorption tower internal upper part
Pouring head is two or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620520216.5U CN206121483U (en) | 2016-06-01 | 2016-06-01 | Selectivity low temperature denitrification facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620520216.5U CN206121483U (en) | 2016-06-01 | 2016-06-01 | Selectivity low temperature denitrification facility |
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| CN206121483U true CN206121483U (en) | 2017-04-26 |
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| CN201620520216.5U Expired - Fee Related CN206121483U (en) | 2016-06-01 | 2016-06-01 | Selectivity low temperature denitrification facility |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355301A (en) * | 2017-07-06 | 2017-11-17 | 华电电力科学研究院 | Peak regulation Gas Generator Set cold start movable type denitration control system and method |
| CN107789967A (en) * | 2017-11-27 | 2018-03-13 | 江苏垦乐节能环保科技有限公司 | One kind sintering flue gas low-temperature denitrification apparatus and its implementation |
| CN111167299A (en) * | 2020-03-02 | 2020-05-19 | 中晶蓝实业集团有限公司 | Flue gas denitration device based on liquid oxidizing ions and application method thereof |
| CN111185077A (en) * | 2020-03-02 | 2020-05-22 | 中晶蓝实业集团有限公司 | Flue gas denitration device and method based on gaseous oxidizing ions |
-
2016
- 2016-06-01 CN CN201620520216.5U patent/CN206121483U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355301A (en) * | 2017-07-06 | 2017-11-17 | 华电电力科学研究院 | Peak regulation Gas Generator Set cold start movable type denitration control system and method |
| CN107789967A (en) * | 2017-11-27 | 2018-03-13 | 江苏垦乐节能环保科技有限公司 | One kind sintering flue gas low-temperature denitrification apparatus and its implementation |
| CN107789967B (en) * | 2017-11-27 | 2023-12-08 | 江苏垦乐节能环保科技有限公司 | Sintering flue gas low-temperature denitration device and implementation method thereof |
| CN111167299A (en) * | 2020-03-02 | 2020-05-19 | 中晶蓝实业集团有限公司 | Flue gas denitration device based on liquid oxidizing ions and application method thereof |
| CN111185077A (en) * | 2020-03-02 | 2020-05-22 | 中晶蓝实业集团有限公司 | Flue gas denitration device and method based on gaseous oxidizing ions |
| CN111167299B (en) * | 2020-03-02 | 2024-02-27 | 中晶环境科技股份有限公司 | Flue gas denitration device based on liquid oxidizing ions and application method thereof |
| CN111185077B (en) * | 2020-03-02 | 2024-03-29 | 中晶环境科技股份有限公司 | Flue gas denitration device and method based on gaseous oxidizing ions |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170426 |
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| CF01 | Termination of patent right due to non-payment of annual fee |