CN206215009U - A kind of SO3 and NOx cooperation-removals device - Google Patents
A kind of SO3 and NOx cooperation-removals device Download PDFInfo
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- CN206215009U CN206215009U CN201621053463.5U CN201621053463U CN206215009U CN 206215009 U CN206215009 U CN 206215009U CN 201621053463 U CN201621053463 U CN 201621053463U CN 206215009 U CN206215009 U CN 206215009U
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Abstract
The utility model discloses a kind of SO3With NOx cooperation-removal devices, including low-sulfur acid denitrating system and SO3Removing system, low-sulfur acid denitrating system includes ammonia-spraying grid and SCR reactors, if setting dry catalyst interlayer in SCR reactors, ammonia-spraying grid front portion is connected with former fume pipe, rear portion is connected and is connected with the top of SCR reactors by the first fume pipe, and ammonia pipe is connected with ammonia-spraying grid；SO3Removing system includes SO3Reactor, compressed air cylinder and lye tank, SO3The anterior connection of reactor is simultaneously connected by the second fume pipe with the bottom of SCR reactors, and rear portion is connected with neat stress pipe, SO3Atomizer is installed, atomizer is connected and is connected with compressed air cylinder and lye tank respectively by air hose and alkali liquor pipe in reactor.A kind of SO of the present utility model3There is low cost with NOx cooperation-removal devices, easy for operation simple, operating cost is low, practical value beneficial effect high.
Description
Technical field
The utility model is related to a kind of SO3With NOx cooperation-removal devices.
Background technology
The energy consumption per unit that China " 12 " planning outline is proposed declines 16%, CO2 emission drop
Low by 17%, total emissions of major pollutants reduces 8-10%.
" 12 " are the critical periods of China's socio-economic development transition, realize that low carbon development, Green Development are " 12
Five " theme of development.But due to the particularity of China's energy resource structure, within considerable time, once can based on coal
Source supply pattern will not occur essence change.Generally speaking, during " 12 ", energy demand can also keep rapid growth
Situation, according to State Grid's project study center on《Long-term generating capacity and electricity needs development prediction in China》, by
In the end of the year 2013, China's coal electricity installed capacity is 8.47 hundred million kilowatts.Hundred million kilowatts of the year two thousand thirty coal Denso machine 12.5-14 of prediction；The year two thousand fifty
Hundred million kilowatts of coal Denso machine 14-15.Large-scale coal fired power generation can be brought than now more serious environmental problem.
Coal-burning boiler in all parts of the country or will add denitrification apparatus at present, wherein more than 90% is SCR denitration
Device, purpose is pollutant NOx in removing flue gas in itself for denitration, improves air quality, but, the NH that denitrification apparatus are produced4HSO4
Low-temperature air preheater is often blocked and corroded, operation normal to boiler causes great difficulty, sometimes have to shut down inspection
Repair.In addition, SO3Itself it is also a kind of harmful pollutant, SO3If escaped into air, chimney blue smoke can be caused to drag
Tail, had both influenceed sky visibility, can produce injury to human body again, and the inconvenience of life is brought to local resident, also often suffered to work as
The complaint of ground resident.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of SO3With NOx cooperation-removal devices, SO3Assisted with NOx
Same removing means, can remove the pollutants such as NOx, and SO can be eliminated again3Deng pollutant, the application prospect in coal-burning power plant of China is wide
It is wealthy.
A kind of SO of the present utility model3With NOx cooperation-removal devices, including low-sulfur acid denitrating system and SO3Removing system,
The low-sulfur acid denitrating system includes ammonia-spraying grid and SCR reactors, if setting dry catalyst interlayer, institute in the SCR reactors
State ammonia-spraying grid front portion and be connected with former fume pipe, rear portion is connected with the first fume pipe and anti-with the SCR by the first fume pipe
Answer the top of device to be connected, ammonia pipe is connected with the ammonia-spraying grid；The SO3Removing system includes SO3Reactor, compression
Air tank and lye tank, the SO3Reactor front portion is connected with the second fume pipe and is reacted with the SCR by the second fume pipe
The bottom of device is connected, and rear portion is connected with neat stress pipe, the SO3Atomizer, the atomizer are installed in reactor
Air hose and alkali liquor pipe are connected with, and are connected with the compressed air cylinder and lye tank respectively by air hose and alkali liquor pipe.
Further, the lye tank is connected with lye pump, and passes sequentially through lye pump, alkali liquor pipe with the atomizer
It is connected.
In the application, after the device of the SCR denitration of extraordinary catalyst is disposed with, a set of SO is further added by3Removing equipment, makes
Flue gas further removes SO after NOx is removed3, both ensured NOx qualified discharges, (the NH of boiler export flue gas is reduced again4)2SO4
And NH4HSO4, the stifled ash and corrosive pipeline of low temperature air preheater are largely avoid, the security of boiler operatiopn is improve, also improve
The service life of SCR denitration device.
In the application, low-sulfur acid denitrating system uses ammoniacal liquor or liquefied ammonia as reducing agent, by evaporator, ammonia sky blender
Enter ammonia-spraying grid by ammonia pipe after vaporization to mix with former flue gas, subsequently into SCR reactors, what is set in SCR reactors contains
There is V2O5Under the catalyst interlayer effect of catalyst, the NOx conversion in former flue gas is generated into N2And water, equation is as follows：
4NO+4NH3+O2→4N2+6H2O (main reaction)
6NO+4NH3→5N2+6H2O (side reaction)
6NO2+8NH3→7N2+12H2O (main reaction)
2NO2+4NH3+O2→3N2+6H2O (side reaction)
And in conventional scr reactor, catalyst contains V2O5, the SO in flue gas2When by the catalyst, can be in catalysis
In the presence of agent, with the O in flue gas2With reference to production SO3, and generate (NH with NH3 reactions more than needed4)2SO4And NH4HSO4,
2SO2+O2→2SO3
SO3+NH3+H2O→NH4HSO4
SO3+2NH3+H2O→(NH4)2SO4
Wherein ammonium hydrogen sulfate NH4HSO4There are gaseous state (350 DEG C of ＞), liquid (147-350 DEG C) and solid-state dust (147 DEG C of ＜)
Three states.Its characteristic is very viscous dust, and particle diameter is superfine, and this corrosivity ammonium hydrogen sulfate can cause a large amount of ash contents to settle
Cause blocking, and cold temperature end corrosion in air preheater with interlayer is stuck in metal surface.The life-span of air preheater is reduced,
In addition, this blocking can increase the resistance of flue, increase the power consumption of air-introduced machine, or even force blowing out to clear up preheater and block up
Ash.
The catalyst of specially treated is set in present apparatus SCR reactors, it is low partially in selecting catalyst according to different smoke components
Few V2O5Content, and WO is added in the catalyst3And MoO3Etc. co-catalyst component, improve SO2Oxidation activity so that catalysis
Agent both has larger denitration activity, while SO2Oxygenation efficiency is relatively low,
By the flue gas after denitration, go out SCR reactors and enter SO3Reactor, the device is by solution of sodium bisulfite
Alkaline solutions such as (or) sodium sulfites, by wear-resisting atomizer, equably sprays into SO3In reactor, alkaline solution and flue gas
SO3Generation selective reaction is so as to remove SO3.Last clean flue gas leaves SO3Reactor, drains into back-end ductwork.SO3It is de-
Except efficiency is essentially from two reaction mechanisms：Quick liquid phase reactor and the solia particle due to generating high-specific surface area, make
Obtaining may be with SO3The quick gas-solid reaction of generation.The technology is to SO3Removing it is more thorough, removal efficiency up to more than 90%,
Can be by SO3Very low concentration (＜ 3ppm) is removed to, NH is largely avoid4HSO4Generation.
The device has little to no effect (efficiency of combustion influences ＜ 0.1%) on the thermal efficiency of boiler, and easy to adjust, fortune
Row expense is low, and the protective effect to boiler tail equipment is very big.
A kind of SO of the present utility model3There is low cost with NOx cooperation-removal devices, easy for operation simple, operation
Expense is low, practical value beneficial effect high.
Brief description of the drawings
Fig. 1 is a kind of SO of the utility model3With the structural representation of NOx cooperation-removal devices.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
As shown in Figure 1, a kind of SO of the present embodiment3With NOx cooperation-removal devices, including low-sulfur acid denitrating system and SO3It is de-
Except system, low-sulfur acid denitrating system includes ammonia-spraying grid 1 and SCR reactors 2, if setting dry catalyst interlayer in SCR reactors 2
3, the front portion of ammonia-spraying grid 1 is connected with former fume pipe 4, and rear portion is connected with the first fume pipe 5 and anti-with SCR by the first fume pipe 5
Answer the top of device 2 to be connected, ammonia pipe 6 is connected with ammonia-spraying grid 1；SO3Removing system includes SO3Reactor 7, compressed air
Tank 8 and lye tank 9, SO3The front portion of reactor 7 is connected with the second fume pipe 10 and by the second fume pipe 10 and SCR reactors 2
Bottom is connected, and rear portion is connected with neat stress pipe 11, SO3Atomizer 12 is installed in reactor 7, atomizer 12 is connected with
Air hose 13 and alkali liquor pipe 14, and be connected with compressed air cylinder 8 and lye tank 9 respectively by air hose 13 and alkali liquor pipe 14, alkali
Liquid case 9 is also associated with lye pump 15, and passes sequentially through lye pump 15, alkali liquor pipe 14 and be connected with atomizer 12.
A kind of SO of the present embodiment3There is low cost with NOx cooperation-removal devices, easy for operation simple, running cost
With low, practical value beneficial effect high.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined
May be appreciated other embodiment.
Claims (2)
1. a kind of SO3With NOx cooperation-removal devices, it is characterised in that：Including low-sulfur acid denitrating system and SO3Removing system, it is described
Low-sulfur acid denitrating system includes ammonia-spraying grid and SCR reactors, if being set in the SCR reactors in catalyst interlayer, the spray
Ammonia grid front portion is connected with former fume pipe, and rear portion is connected with the first fume pipe and by the first fume pipe and the SCR reactors
Top be connected, ammonia pipe is connected with the ammonia-spraying grid；The SO3Removing system includes SO3Reactor, compressed air
Tank and lye tank, the SO3Reactor front portion is connected with the second fume pipe and by the second fume pipe and the SCR reactors
Bottom is connected, and rear portion is connected with neat stress pipe, the SO3Atomizer, the atomizer connection are installed in reactor
There are air hose and alkali liquor pipe, and be connected with the compressed air cylinder and lye tank respectively by air hose and alkali liquor pipe.
2. a kind of SO according to claim 13With NOx cooperation-removal devices, it is characterised in that：The lye tank is connected with
Lye pump, and pass sequentially through lye pump, alkali liquor pipe and be connected with the atomizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621053463.5U CN206215009U (en) | 2016-09-12 | 2016-09-12 | A kind of SO3 and NOx cooperation-removals device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621053463.5U CN206215009U (en) | 2016-09-12 | 2016-09-12 | A kind of SO3 and NOx cooperation-removals device |
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| Publication Number | Publication Date |
|---|---|
| CN206215009U true CN206215009U (en) | 2017-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621053463.5U Expired - Fee Related CN206215009U (en) | 2016-09-12 | 2016-09-12 | A kind of SO3 and NOx cooperation-removals device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109046016A (en) * | 2018-09-14 | 2018-12-21 | 昆明理工大学 | A kind of method of relieving haperacidity End gas production high-concentration sulfuric acid |
-
2016
- 2016-09-12 CN CN201621053463.5U patent/CN206215009U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109046016A (en) * | 2018-09-14 | 2018-12-21 | 昆明理工大学 | A kind of method of relieving haperacidity End gas production high-concentration sulfuric acid |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170606 |